All objects descend toward the Earth's surface with a constant acceleration of g start text, g, end text in the absence of air resistance. g = 9.8 m s 2 g applies to Earth's surface.
When something descends without any air resistance, that is called free fall.Objects that are claimed to be falling freely do not actually experience much air resistance; instead, gravity is the only force acting on them as they fall. Regardless of their mass, all objects will fall with the same rate of acceleration under these circumstances.
What is an object's constant acceleration in free fall?The acceleration of a free falling object can be solved using algebra. The acceleration is constant and equal to the gravitational acceleration g, which at sea level on Earth is 9.8 meters per square second.
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What happens when light rays pass from air to water?; What is the bending of light rays due to a change in?
When light rays enters from air to water, its speed decreases. It bends towards the normal.
Refraction is the bending of light because of a change in medium. There may be two ways of bending light- towards the normal or away from the normal.
Optical density is the concept that determines the way the light will bend while changing the medium. A medium in which the speed of light is less is called an optically denser medium, and a medium in which the speed of light is more is called an optically rarer medium.
When light enters from an optically rarer medium to an optically denser medium, its speed decreases, and it bends toward the normal. When light enters from an optically denser medium to an optically rarer medium, its speed increases, and it bends away from the normal.
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The matter in this series of images is going threw a change. Draw a conclusion about the type of change shown. Is it a physical change or a chemical change
The matter in this series of images is going through a change and a conclusion about the type of change is shown which indicates that it is a chemical change.
What is a Chemical change?This is referred to as the type of change which occurs when the substance's composition is changed and it also occurs when a substance combines with another to form a new substance or when one is broken down into two or more different substances.
The image shown indicates that fire was lit and the substance was subjected to heat which therefore means that there will be gases produced as bubbles are likely to be seen also which indicates a new substance being formed and it is a characteristic of a chemical change which is therefore the reason why it was chosen as the correct choice.
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gfcis operate by comparing the amount of current flowing in the ___ circuit conductors of a 240-volt circuit. when these are not the same, the gfci device trips.
gfcis operate by comparing the amount of current flowing in the outlet circuit conductors of a 240-volt circuit. when these are not the same, the gfci device trips.
What is gfcis ?This refers to an electrical safety device that immediately breaks an electrical circuit with leakage current to the ground. It protects equipment and reduces the risk of serious harm from an ongoing electric shock. It is also known as a residual-current device/ residual-current circuit breaker or ground fault circuit interrupter.
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An audio speaker producing a steady sound at an outdoor concert is 42 ft away from you. If you move to a position where the speaker is 77 ft distant, by what factor will the amplitude of the sound change?
One of the phenomena whose strength changes with the square root of the inverse of the distance from the source is sound.
define amplitude ?
A periodic variable's amplitude measures its change over a single period (such as time or spatial period). A non-periodic signal's magnitude in relation to a standard value is its amplitude. There are several definitions of amplitude (see below), all of which depend on how much the extreme values of the variable deviate from one another. The phase of a periodic function is frequently referred to as the amplitude in older publications.
=(42/77)^2
=(0.545)^2
=0.297025
Thus, the sound increases in volume by around 8% from its initial level.
(The noise level has been lowered by 10.98 dB.)
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time quantum is defined in: group of answer choices shortest job scheduling algorithm priority scheduling algorithm round robin scheduling algorithm multilevel queue scheduling algorithm
In the round robin scheduling algorithm, time quantum is specified. As part of a theory that contends that time is not continuous, a chronon is a discrete and indivisible "unit" of time that is proposed.
A preemptive scheduler permits a certain process to operate for a brief period of time known as a quantum (or time slice). The process is put back in the ready queue after this amount of time and another one is put into the run state (i.e., the scheduler ensures that the processes take turns to run). Round Robin Scheduling fixes the time quantum before scheduling the processes such that no one process receives more CPU time than one time quantum at a time. The response time of the processes is too long if time quantum is too large, which could not be acceptable in an interactive environment.
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ball a is dropped from the top of a building. one second later ball b is dropped from the same building. meglect air resistance
The distance widens if there is no air resistance or an equal amount of air resistance. This is owing to the fact that, although having identical accelerations, Ball A's speed will always be different from Ball B's since Ball A has been accelerating for longer than Ball B by one second.
What is Acceleration?The rate at which speed and direction of velocity vary over time. A point or object going straight ahead is accelerated when it accelerates or decelerates. Even if the speed is constant, motion on a circle accelerates because the direction is always shifting.
What is Speed?A scalar quantity, speed is defined as the quantity of the change in an object's position over time or per unit of time.
Hence, although having identical accelerations, Ball A's speed will always be different from Ball B's since Ball A has been accelerating for longer than Ball B by one second.
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This painting represents the Milky Way Galaxy as it would appear edge-on from a distance. Label the indicated features; be sure to pay attention to where the leader lines are pointir Drag the labels to the appropriate blanks on the diagram. You may use a label more than once. View Available Hint(s) Reset Help bulge globulan clusters halo disk
The indicated features from top to bottom:
spiral armbulgediskIt is called a spiral galaxy because it looks like a spinning windmill when viewed from above or below. The Sun is in one of the spiral arms about 25,000 light-years away from the center of the galaxy.
Our solar system is in a galaxy called the Milky Way which is tightly packed with 100 to 400 billion other stars many of which have planets of their own. The Milky Way got its name because it looks like a stream of spilled milk across the sky. An elliptical galaxy is a type of galaxy with an almost featureless image that is nearly elliptical and smooth.
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Problem 12.15 Determine the electrical conductivity of a Cu-Ni alloy that has a yield strength of 100 MPa. Refer to Eigures 12.9 an 8.16. (1-m) the tolerance is +/-5% Click if you would like to Show Work for this question: Open Show Work Electrical resistivity (10-8 82 m) Composition (wt% Ni) Figure 12.9 Room-temperature electrical resistivity versus composition for copper-nickel alloys. 400 Tensile strength (MPa) Tensile strength (ksi) Yield strength (MPa) Yield strength (ksi) do o 10 40 50 10 40 50 20 30 Nickel content (wt%) (a) 20 30 Nickel content (wt%) (b) Elongation (% in 2 in.) 0 10 40 20 30 Nickel content (wt%) (e) Figure 8.16 Variation with nickel content of (a) tensile strength, (b) yield strength, and (e) ductility (EL) for copper- nickel alloys, showing strengthening
The electrical conductivity of a Cu-Ni alloy that has yield strength of 100MPa is 47 ohm-meter.
Electrical conductivity is indicated by the image σ and has SI units of siemens per meter (S/m). In electrical designing, the Greek letter κ is utilized. Now and again the Greek letter γ addresses conductivity. In water, conductivity is in many cases detailed as unambiguous conductance, which is an action contrasted with that of unadulterated water at 25°C.
We know very well that electrical conductivity is just converse of resistivity multiplied by the yield strength.
From the given diagram, we can understand that maximum value of electrical resistivity is 47×10⁻⁸ (ohm-meter)⁻¹.
So, electrical conductivity =electrical resistivity ×yield-strength
=>electrical conductivity =(47×10⁻⁸ ×100×10⁶)
=>electrical conductivity =47 ohm-meter.
Hence, value of electrical conductivity is 47 ohm-meter.
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(Complete question) is:
Problem 12.15 Determine the electrical conductivity of a Cu-Ni alloy that has a yield strength of 100 MPa. Refer to Figures 12.9 an 8.16. (1-m) the tolerance is +/-5% Click if you would like to Show Work for this question:
Which factors affect the gravitational force between two objects distance and velocity mass and distance mass and weight?; What factors affect the gravitational force between two objects?; How are gravitational forces affected by distance between and masses of two objects?; Does mass affect gravity?
How much gravitational attraction there is between two objects depends on their masses and distance from one another. The relationship between an object's mass its gravitational pull is inverse.
Exactly what does gravitational force mean?The attraction that the earth has over a body is known as the gravitational force. Examples of motion brought on by gravity influence include the downhill motion of water in streams and streams, upward and motion of things that are thrown, like balls, and also the downward motion of fruit and leaf falling to the ground.
Why do you use the word gravitational?The gravitational force, generally known as gravity, affects every material object in the universe. Any two separate mass objects or particles will gravitate toward one another due to the force of gravity. Gravity affects things of all sizes, including galaxy clusters and subatomic particles.
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Part A
An ideal gas expands at a constant total pressure of 3.1 atm from 450 mL to 810 mL . Heat then flows out of the gas at constant volume, and the pressure and temperature are allowed to drop until the temperature reaches its original value.
Calculate the total work done by the gas in the process.
Express your answer to two significant figures and include the appropriate units.
Part B
Calculate the total heat flow into the gas.
Express your answer to two significant figures and include the appropriate units.
The work that is done by the gas can be obtained as 110 J.
There is not enough information in the question to determine part B.
What is the work done?We know that a gas is said to do work whenever the gas expands. The expansion of a gas mans that the gas is able to increase its volume and we can see from the question that the volume of the gas was quite able to move from a value of 450 mL to 810 mL .
How then can be be able to obtain the work that has been done by the gas in this case? We are aware that we do have the following parameters from the question;
Pressure of the gas = 3.1 atm
Initial volume of the gas = 450 mL or 0.45 L
Final volume of the gas = 810 mL or 0.81 L
The we have the formula;
W =PΔV
W = work done
P = pressure of the gas
ΔV = change in the volume of the gas
Thus;
W = 3.1 (0.81 - 0.45)
W = 1.12 atm L or 110 J
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What is the net force on skydiver falling?; What is the net force on a skydiver falling with a constant velocity of 10 m/s downward?; What happens when a skydiver jumps?; What's the highest someone has skydived?
If his velocity remains constant, there will be no net force acting on him since any force acting on him will be precisely cancelled out by a force acting in the opposite direction.
What is the net force that causes skydivers to fall?The falling skydiver experiences an upward push and acceleration. If an object is falling downward and there is an upward net force acting on it, the object will slow down. The skydiver slows down as a result. Once more, the skydiver approaches a terminal velocity as the air resistance diminishes along with the speed.
What is a skydiver's net force when they reach their terminal velocity?ZERO When an object reaches its terminal velocity, the upward force from air resistance and the force of gravity are equal.
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based on this passage, which of the following might be true about the early history of modern physics? select it had a very practical component select it was uninteresting to most people select none of these select it was often combined with many topics studied in philosophy select it was underdeveloped and primitive
True statement about the early history of modern physics is option A: it had a very practical component.
The early history of physics could explain everything out of others, thus it had a practical component. The minds of almost all thinkers are left with the patterns of scientific reasoning and apotheosis in modern physics. From the time of the early renaissance to the nineteenth century, physics represented the ultimate expression of scientific investigation for almost all thinkers. The unchanging principles of all motion and life on earth are being derived from its static laws. By the nineteenth century, it seemed that most of science had already been "cleared up," and only a few remaining details remained.
This cosmology was overthrown by the idea of a universal morphing of kinds, which completely altered it. The very view of science held by most people was among the things that had to change in light of Darwin’s work.
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4. The bar has a mass of 10 kg and is subjected to a couple moment of M=50 N·m and a force of P=80 N, which is always applied perpendicular to the end of the bar. The stiffness of spring is k=30 N/m and its free length is 0.5 m. The spring remains in the vertical position due to the roller guide at B. Determine the total work done by all the force acting on the bar when it has rotated downward from (=0( to 90 (. (15 points)
The total work done by all the force acting on the bar when it has rotated downward from 0 to 90° is 4500 N·m.
Solving for total work done:The total work done by all the forces acting on the bar can be calculated using the equation for work done by a torque and a spring force.
m = 10 kg
M= 50 N·m
P=80 N
k=30 N/m
x₀ = 0.5 m
θ = 90°
The work done by the torque is given by:
work_torque = M * θ
where,
M= the couple moment
θ = theta is the angle of rotation (90 degrees).
The work done by the spring force is given by:
work_spring = 1/2 * k * (x² - x₀²)
where,
k = the spring constant
x = the displacement of the spring
x₀ = the free length of the spring.
Since the spring is in a vertical position due to the roller guide at B, it will not displace and x=x₀=0.5m, and no work done by spring force.
Therefore, the total work done by all the forces acting on the bar is:
work_total = work_torque
M * θ = 50 N·m * 90 degrees
= 4500 N·m
Hence, the total work done by all the force acting on the bar is 4500 N·m when it has rotated downward from 0 to 90°.
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Help please!
Zach drives his car with an average velocity of 24 m/s toward the east. How long will it take him to drive 560 km on a perfectly straight highway?
if you are charged with speeding 25 mph or more over the speed limit or at a speed 95 mph or greater
A Class B misdemeanor is committed when a driver exceeds the speed limit by twenty-six (26) to thirty-four (34) miles per hour. Court supervision is an option for sentences.
For a breach of this offence, you may receive a sentence of conditional release, probation, or up to two (2) years of court supervision. a misdemeanor that carries a fine or brief jail sentence as punishment. Common crimes like moving offences are typically adjudicated amicably, without a trial. The New Dictionary of Cultural Literacy, Third Edition Copyright by Houghton Mifflin Harcourt Publishing Company. (felony.) Aggressive driving practice's include speed. The general growth in aggressive driving has been attributed to a number of issues, with traffic congestion being one of the most commonly cited.
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The complete question is -
if you are charged with speeding 25 mph or more over the speed limit or at a speed 95 mph or greater. Which is committed when a driver exceeds the speed limit.
An inventive child named Nick wants to reach an apple in a tree without climbing the tree. Sitting in a chair connected to a rope that passes over a frictionless pulley (see figure below), Nick pulls on the loose end of the rope with such a force that the spring scale reads 310 N. Nick's true weight is 290 N, and the chair weighs 160 N. Nick's feet are not touching the ground.
(b) Show that the acceleration of the system is upward. (Do this on paper. Your instructor may ask you to turn in this work.)
Find its magnitude.
m/s2
(c) Find the force Nick exerts on the chair.
N
b) The magnitude of the acceleration of system is [tex]3.7m/s^2[/tex].
c)The force exerted by nick on the chair is 89.483 N.
Given,
weight of nick = 290 N
Weight of chair = 160 N
Spring scale force ,T = 310 N
then,
Total weight = 290+160= 450 N
b)
then the total mass be
Mass ,[tex]m = \frac{weight}{force}= \frac{450}{9.8} = 45.918 Kg[/tex]
By adding the forces of both ropes, the upward force can be calculated.
Net upward force = 310 + 310 = 620 N
The downward force can be calculated by adding the forces generated by Nick and its chair.
Net downward force = 290 + 160 = 450 N
Then, the resultant force be,
F = Net upward force - Net downward force = 620 - 450 = 170 N
To determine acceleration use formula,
[tex]F=ma\\\\45.918*a = 170\\\\a = \frac{170}{45.918} = 3.7 m/s^2[/tex]
Because net upward force exceeds net downward force, the resultant force is directed upwards thus the acceleration is also upward.
c)
The force exerted by nick on the chair can be calculated by
F = n + T - 290\\\\
ma=n+T-290
Here, consider only nick's weight then mass will be
[tex]m=\frac{290}{9.8}=59.591 kg[/tex]
[tex]59.591*3.7=n+310-290\\\n=89.483 N[/tex]
Thus, the force exerted by nick on the chair is 89.483 N
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a piston presses down on a sealed cylinder filled with gas until the gas occupies a space that is half as big as before. as a result, the pressure on the gas is
A piston presses down on a sealed cylinder filled with gas until the gas occupies a space that is half as big as before. as a result, the pressure on the gas becomes doubled.
When the piston is pushed down in a cylinder filled with gas What happens to the volume of the gas inside?
When the pressure on the piston is doubled, it moves down until the pressure exerted by the gas equals the pressure exerted by the piston. At this point, the volume of the gas is halved. If the pressure on the piston is again doubled, the volume of gas decreases to one-fourth of its original volume.
What happens to the pressure in a sealed container if the amount of gas in the container increases?
Pressure increases.
Why does the pressure inside a container of gas increase if more gas is added to the container?
The pressure inside a container of gas increases when more gas is added to the container because the volume of the container doesn't change, and the added gas adds more molecules to push against the sides of the container. It is the movement of the gas molecules pushing against the container that causes pressure.
Thus, pressure is doubled.
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Two electric model trains are sitting on a long stretch of track. One train has a mass of 5.50 kg and rolls into the second train which is at rest. The second train is much smaller, with a mass of 550.0 g. After the bump, the large and small trains have velocities of 3.2727 cm/s and 7.2727cm/s , respectively. What is the original velocity of the large train before the bump?
The original velocity of the large train before the bump will be 3.999 cm/s.
Velocity can be defined as the rate of change distance with respect to time.
Its SI unit is m/s.According to the law of conservation of momentum,
m₁u₁ + m₂u₂ = m₁v₁ + m₂v₂
m₁ = mass of the first model electric train = 5.50 kg = 5500 g
u₁ = initial velocity of the first model train
m₂ = mass of the second model electric train = 550.0 g
u₂ = 0 m/s as it is at rest
v₁ = final velocity of the first model train after collision = 3.2727 cm/s
v₂ = final velocity of the second model train after collision = 7.2727 cm/s
By putting the values in the main equation, u₁ can be calculated,
5500*u₁ + 550*0 = 5500*3.2727 + 550*7.2727
5500*u₁ = 17999.85 + 3999.985
5500*u₁ = 21999.835
u₁ = 21999.835/5500
u₁ = 3.999 cm/s
The original velocity of the large train before the bump will be 3.999 cm/s.
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a fixed amount of a monatomic ideal gas is taken through the following cyclic process. originally (a) it is near atmospheric pressure (100 kpa) with a volume of 0.50 m3 and a temperature of 375 k. then it is isothermally compressed to half its volume (b). then its volume triples (c) during an isobaric expansion.
The qualitative sketch of the process on the PV plane is attached below:
What is ideal gas equation?The ideal gas law (also called the perfect gas law), the relationship between pressure P, volume V, and temperature T of a gas in the boundary region between low pressure and high temperature. Gas molecules move almost independently. each other. In such cases, all gases obey an equation of state known as the ideal gas law.
PV = nRT, where n is the number of moles of gas and R is the universal (or complete) gas constant, 8.31446261815324 joules/kelvin/mol (the universal gas constant is defined as Avogadro's number NA multiplied by Boltzmann's constant k) . ) In the International System of Units, energy is measured in joules, volume in cubic meters (m3), force in newtons (N), and pressure in pascals (Pa). where 1 Pa = 1 N/m2. A force of 1 Newton moving a distance of 1 meter does 1 Joule of work. Therefore, the dimension of both products PV and nRT is work (energy).
The qualitative sketch of the process is drawn on the PV plane.
At A,
P₁ = 100 kPa
V₁ = 0.50 m³
T₁ = 375 K
At B,
T₂ = 375 K
V₂ = 0.25 m³
P₁V₁ = P₂V₂
So, P₂ = (100× 10³ ×0.50)/ 0.25
= 200 kPa
At C,
P₃ = 200 kPa
V₃ = 0.75 m³
We know, V₂/ T₂ = V₃/ T₃
So,
T₃ = V₃T₂/ V₂
= (0.75 × 375)/ 0.25
= 1125 K
At D,
P₄ = 100 kPa
T₄ = 1125 K
V₄ = P₃V₃/ P₄
= (200 × 0.75)/ 100
= 1.5 m³
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The complete question is:
an 15-cmcm-long bicycle crank arm, with a pedal at one end, is attached to a 24-cmcm-diameter sprocket, the toothed disk around which the chain moves. a cyclist riding this bike increases her pedaling rate from 65 rpmrpm to 91 rpmrpm in 12 ss. assume constant angular acceleration.
The angular acceleration of the crank arm is 2.167 rad/s².
In physics, angular acceleration is the rate at which angular velocity changes over time. There are two types of angular acceleration. They are spin angular acceleration whereas orbital angular acceleration.
As opposed to orbital angular acceleration, which is the angular acceleration of a point particle about a fixed origin. Spin angular acceleration describes the angular acceleration of a rigid body as to its centre of rotation. The unit of measurement for angular acceleration is the angle per unit time squared and it is typically denoted by the symbol alpha.
When the angular speed changes from increasing counterclockwise to decreasing clockwise in two dimensions, the pseudoscalar known as angular acceleration is assumed to have a positive sign.
The angular acceleration of the crank arm is:
a = (91rpm - 65rpm)/ 12s = 2.167 rad/s²
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A variety of natural processes can affect Earth's atmospheric temperature in a relatively short period of time. Which of the following would contribute to an overall cooling of Earth's atmospheric temperature?
Increasing the albedo of the Earth's surface & increasing the abundance of volcanic aerosols, contribute to an overall cooling of Earth's atmospheric temperature. Correct answer: letters B y D.
Because, the increased albedo of the Earth's surface helps reflect more incoming solar radiation back into space, which reduces the amount of solar energy absorbed by the atmosphere. Volcanic aerosols also help cool the atmosphere by reflecting incoming solar radiation and blocking some of the outgoing longwave infrared radiation emitted by the Earth's surface.
The Role of Albedo and Volcanic Aerosols in Cooling Earth's Atmospheric TemperatureThe albedo of the Earth's surface is a measure of how much of the sun's energy is reflected back into space. Increasing the albedo of the Earth's surface can be achieved through various methods, such as planting more reflective vegetation and reducing the amount of dark pavement and buildings.
Volcanic aerosols can also contribute to cooling the Earth's atmosphere. When a volcano erupts, it releases large amounts of ash and other particles into the atmosphere. These particles can scatter and absorb the sun's energy, reducing the amount of energy that reaches the Earth's surface.
Additionally, these particles can act as cloud condensation nuclei, increasing the amount of clouds in the atmosphere. These clouds can act as a blanket, reflecting more of the sun's energy back into space and further cooling the atmosphere.
A variety of natural processes can affect Earth's atmospheric temperature in a relatively short period of time. Which of the following would contribute to an overall cooling of Earth's atmospheric temperature?
Choose one or more:
A. Increasing the abundance of methane in the atmosphere
B. Increasing the albedo of the Earth's surface
C. Increasing the abundance of carbon dioxide in the atmosphere
D. Increasing the abundance of volcanic aerosols
E. Increasing the abundance of sunspots
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dams at two different locations are needed to form a lake. when the lake is filled, the water level will be at the top of both dams. the dam
The force of the water on Dam #2 is 8 times than the force on Dam #1. Hence, option (c) is correct.
What is force?The definition of force in physics is: The push or pull on a massed object changes its velocity.
Let the height and wide of dam #1 is H and d respectively.
Then, the height and wide of dam #2 is 2H and 2d respectively.
Average force acting on the dam #1 = 1/2( pressure at the surface of the lake + pressure at the bottom of the lake) × area of the dam#1
= 1/2(0 + Hρg)×Hd
= H²ρgd/2
Average force acting on the dam #2 = 1/2( pressure at the surface of the lake + pressure at the bottom of the lake) × area of the dam#2
= 1/2(0 + 2Hρg)×2H × 2d
= 8H²ρgd/2
Hence, the force of the water on Dam #2 is 8 times than that on Dam #1.
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Your question is incomplete, but most probably full question was:
Dams at two different locations are needed to form a lake. when the lake is filled, the water level will be at the top of both dams. The Dam #2 is twice as high and twice as wide as Dam #1. How much greater is the force of the water on Dam #2 than the force on Dam #1? (Ignore atmospheric pressure; it is pushing on both sides of the dams.) A. 2 B. 4 C. 8 D. 16
if the magnitude of the net force acting on the particle is f , how long does it take the particle to acquire its final velocity, 2v in the positive y direction? express your answer in terms of m , f , and v . if you use a numerical coefficient, use three significant figures.
The final velocity, 2v in the positive y direction, is 2.24mv/F. The final velocity is in terms of mass, velocity, and force.
Given:
Initial velocity, Vi
Final velocity, Vf = 2v
Mass, m
Acceleration, a
The force is given by:
F=ma
The direction of force is in y direction and the acceleration is given by:
a=Fcosθ/m
From th first equation of motion:
Vf=Vi + at
The initial velocity is zero. Therefore, the final velocity is:
2v=0+ (Fcosθ/m)(t)
2mv / (Fcosθ) = t
If theta is equal to 26.6 degrees.
The final velocity is:
v = 2.24mv/F
Hence. the final velocity, 2v in the positive y direction, is 2.24mv/F. The final velocity is in terms of mass, velocity, and force.
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You put on sunglasses and looks at the outside view. The sky is a little dark, but the reflection from a pond is much darker. Why?
A. Pond reflection is polarized
B. The light outside has changed.
C. Sunglasses are not polarized.
D. Skylight is polarized.
When you put on sunglasses and looks at the outside view, the sky is a little dark, but the reflection from a pond is much darker because Pond reflection is polarized. Option (A) is correct.
What is polarization?In the field of physics, polarization is referred to as a phenomena brought on by the fact that electromagnetic radiation is a wave.
Moving across space, electric and magnetic fields interact to form light. Light waves vibrate electrically and magnetically in perpendicular to one another. The magnetic field and electric field both move perpendicular to one another in different directions.
As a result, the direction of motion is perpendicular to both the plane occupied by the electric field and the plane of the magnetic field that is perpendicular to it.
These magnetic and electric vibrations can take place on a variety of planes. Unpolarized light is a type of light wave that vibrates in more than one plane. The sun, a lamp, and a tube light are all examples of unpolarized light sources.
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If the bond energies of X2 and C-X are 151.9 kJ and 2763 kJ, respectively, and the bond energies of C-C and C-c are 338 kJ and 604 kJ, respectively, give an estimate of AE for the reaction below: C2H4 + X2 => c2H4X2 (in kJ). (Enter your answer as the nearest whole number without units)
= [ 4 (C-H) + 1 (C=C) + 1 (X2) ] - [ 2 (C-X) + 1 + (C-C) + 4 (C-H)
= [ (C=C) +(X2) ] - [ 2 (C-X) + 1 (C-C) ]
= [ 604 +151.9 ] - [ 2 (276.3) + (338)]
= -134.7 KJ
= -135 KJ
Bond energies depend on the number of bonds between atoms. Even though π bonds are weaker than σ bonds, a double bond, which consists of a σ and π is bond, is stronger than a single bond because there are bonds.
A quantity of strength, equal to the distinction among the energies of the Bond energies depend on the number of bonds between atoms. Atoms and the energies of the separated atoms, is released, usually as warmness. that is, the bonded atoms have a lower strength than the character atoms do.
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when striking, the pike, a predatory fish, can accelerate from rest to a speed of 4.0 m/s in 0.14 s .
The acceleration of the predatory fish is 28.57 m/s².
What is the acceleration of predatory fish?
The acceleration of the predatory fish is the rate of change of velocity of the predatory fish with time.
Mathematically, the formula for acceleration is given as;
a = Δv / Δt
where;
Δv is the change in velocity of the predatory fishΔt is the change in time of motion of the predatory fishThe given parameters include the following;
the change in velocity of the predatory fish = 4 m/sthe change in time of motion of the predatory fish = 0.14 sa = (4 m/s) / (0.14 s)
a = 28.57 m/s²
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The complete question is below:
when striking, the pike, a predatory fish, can accelerate from rest to a speed of 4.0 m/s in 0.14 s . find the acceleration?
a student initally stands on a circular platform that is free to rotate without friction about its center. The student jumps off tangentially, setting the platform spinning. Quantities that are conserved for the student-platform system as the student jumps include which of the following? I. Angular momentum II. Linear momentum III. Kinetic energy
The angular momentum is conserved in the conditions.
• A student initially stands on a circular platform and that is free to rotate without friction about its center. The student jumps off tangentially, setting the platform spinning the angular momentum will be conserved because both the angular momentum and linear momentum are vectors, the direction must be considered. As in the given question, the direction of the linear momentum is constantly changing as the circular platform is rotating, and the direction of the angular momentum is always the same.
• That's why the linear momentum changes but the angular momentum does not.
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when the car hit grounds, it pushes down the dirt and its front end sticks in the ground because of ____.
when the car hit the ground, it pushes down the dirt, and its front end sticks in the ground because of kinetic energy.
Kinetic energy is the type of energy that an item or particle has as a result of its motion. When work, which transfers energy, is performed on an item by exerting a net force, the object accelerates and obtains kinetic energy. Kinetic energy is a property of a moving object or particle that is affected by both its speed and its mass. Translation (or motion along a path from one location to another), rotation on an axis, vibration, or any combination of motions are all possible.
It depends on the vehicle and the shape of the bump. The exhaust will most likely be pulled off, door sills twisted, cross member broken, and anything that hangs down will be ripped off.
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When block is placed on a wedge as shown in figure, the block starts sliding down and the wedge also starts sliding on ground. All surfaces are rough. The centre of mass of (wedge + block) system will move
A. leftward and downward
B. rightward and downward
C. leftward and upwards
D. only downward
Rightward and downwards. option B is the correct answer
Internal friction between the wedge and the block means that it won't affect the center of mass' motion. The external friction force exerted on the wedge by the ground causes the center of mass to shift to the right. The center of mass of a block moves downward due to the gravitational force (mg) acting on it.
Frictional Force:
When surfaces of two objects come into contact, the force called friction is what stops motion. In other words, friction weakens a machine's mechanical advantage and decreases the output to input ratio. In a car, reducing friction requires one-fourth of the energy required. Friction in the clutch and tires, however, also has an impact on how well the car can maintain its place on the road. One of the most significant occurrences in the physical universe is friction, a phenomenon that affects everything from machines to molecular structures to matches.
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the predictions of special relativity can sound implausible at first. which of the following provide observational evidence that the theory is correct? the predictions of special relativity can sound implausible at first. which of the following provide observational evidence that the theory is correct? subatomic particles in accelerators exhibit effects of time dilation and mass increase at high speeds. time dilation can be observed in airplanes. light is always observed to travel at the same speed. all of the above are correct.
All of the given options are correct:
Subatomic particles in accelerators exhibit effects of time dilation and mass increase at high speeds.Light is always observed to travel at the same speed.Time dilation can be observed in airplanes.The special theory of relativity or special relativity is a physical theory which states the relationship between space and time. This is often termed as STR theory. Special theory of relativity is based on two postulates –
Laws of Physics are invariant: The states of changed physical systems are not affected, whether these changes of state be referred to the one or the other of two systems in uniform translatory motion relative to each other.The Principle of Invariant Light Speed :Light is always propagated in empty space with a definite velocity c which is independent of the state of motion of the emitting body.In relative theory, reference frames play a vital role. It is used to measure a time of events by using a clock. An event is nothing but an occurrence that refers to a location in space corresponding to the reference frame. For instance, the explosion of a fire flower can be considered as an event.
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