The root-mean-squared speed of a sample of a pure substance in the gas phase is effected by a)temperature of the sample. So, correct option is A.
Genuinely, the root mean square (RMS) is the square foundation of the mean square, which is the number-crunching mean of the squares of a gathering of values. RMS is likewise called a quadratic mean and is an exceptional instance of the summed up mean whose example is 2. Root mean square is likewise characterized as a changing capability in view of a vital of the squares of the qualities which are quick in a cycle.
As such, the RMS of a gathering of numbers is the square of the number-crunching mean or the capability's square which characterizes the persistent waveform.
RMS is given by the below formula,
[tex]v_r_m_s[/tex] =√3KT/m
where K is Boltzmann constant,
T is the temperature,
and m is called as mass of the gas particle.
Hence, correct option is A.
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(Complete question) is:
Which of the following parameters affect the root-mean-squared (rms) speed of a sample of a pure substance in the gas phase?
a)temperature of sample
b)boltzmann constant
c)both a and b
d)None of the above.
what is the magnitude of the acceleration of a skydiver who is currently falling at one-fifth his eventual terminal speed?
The magnitude of the acceleration of the skydiver will be 9.4m/s²
What is Acceleration?Acceleration is the rate of change in velocity.
It involves a change in speed and direction. When acceleration involves a change in speed only there is; Positive acceleration which occurs when an object speeds up. Negative acceleration occurs when an object slows down. Acceleration is a change of velocity over a period of time, expressed by the equation below.
A=Δv/t
At terminal velocity v, acceleration;
a = g
where,
g = Acceleration due to gravity (9.8m/s²)
ma = mg - m[tex](\frac{1}{2}) ^{2}[/tex]g
a = g(1 - [tex]\frac{1}{25}[/tex])
a = [tex]\frac{24}{25}[/tex]g
a = [tex]\frac{24}{25}[/tex] x 9.8
a = 9.4m/s²
The acceleration of the skydiver who is currently falling at one-fifth his eventual terminal speed is 9.4m/s²
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A mass oscillates on a spring with a period T and an amplitude 0.48 cm. The mass is at the equilibrium position x = 0 at t = 0, and is moving in the positive direction. Where is the mass at the times (a) t = T/8, (b) t = T/4, (c) t = T/2 and (d) t = 3T/4? (e) Plot your results for parts (a)through (d) with the vertical axis representing position and the horizontal axis representing time.
On a spring, mass oscillates with an amplitude and a time T. at T=3t/4 the mass will be at 0.48cm away from its mean postion.
What is SHM?Simple harmonic motion is described as the periodic motion of a point across a single direction with an acceleration that is always toward a fixed point in that lines and a distance from that point that is proportional to that acceleration.
Briefing:Mass at the time t = 3T/4
Given T=T, A=0.48cm
φ = -π/2 , x=0, t=0
ω = 2π/T
The position of SHM is given by:
x(t) = Acos(ωt+φ)
x(3T/4) = 0.48cos((2π/T)(3T/4)+(-π/2))
x = 0.48cos(π) = -0.48
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the theory that explains why and how continents move is called; the first motion of an earthquake begins at the; tectonic plates are blocks of; the first motion of an earthquake begins at the ______________________; a terrane becomes part of a continent in a process called; why so many earthquakes right now; the most conclusive proof for continental drift was provided by; convection, ridge push, and slab pull work together to produce what?
The theory that explains about the movement of continents is called continental drift. It states that the earth's continents have moved over time, relative to each other.
Earthquake is one of the major natural disasters. It causes a huge loss of life and property around the world. It occurs due to the shaking of the surface of the earth due to the sudden release of energy in the earth's crust. The first motion of an earthquake begins at the focus. It is the place inside the earth's crust where the earthquake originates.
A terrane becomes a part of a continent in a process called accretion.
Alfred Wegener produced evidence in 1912 that continents are in motion but as he could not explain what forces could move them geologists rejected his ideas. Almost 50 years later, Harry Hess confirmed Wegener's ideas by using the evidence of seafloor spreading to explain his statements.
Convection, ridge push and slab pull work together to produce constant plate tectonic motion.
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the state of stress on a thin-walled cylindrical vessel can be found through equilibrium equations and the assumption that the stresses in the wall thickness have a uniform distribution. summing the forces in the longitudinal direction can obtain the axial stress. this axial stress can be represented by which of the following equations?
In a thin wall pressure vessel, two stresses exist: the longitudinal stress and the hoop stress .
A cylinder is said to be "thin walled" if its radius to thickness (r/t) ratio is at least 10. The internal pressure that is still present in this region of the cylinder is depicted by the pressure field below. The pressure remains steady during the whole cut of the cylinder. Thick wall pressure vessels are determined by the relationship between the mean radius of the vessel and the wall thickness. If this ratio is greater than 10, the vessel is categorized as a thin wall pressure vessel.
A pressure vessel with a thick wall is one in which the ratio is less than 10.
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Now use a handle in the middle to make the pipe narrower in the middle. Record the readings of the flux meter: Flow rate: 5000L/s, area: 1.1m2Which of these quantities stayed the same when you change the size of the pipe and why? Please also move the speed gauge around to see how the speed varies at different locations inside the pipe.
Flow rate stayed the same but why...?
The flow rate is given as 5000L/s, which means that 5000 liters of fluid pass through a cross-sectional area of 1.1m2 per second. If the size of the pipe is changed by using a handle to make it narrower in the middle, the cross-sectional area of the pipe will also change.
However, if the flow rate remains the same, it means that the volume of fluid passing through the pipe per unit of time is still constant.
To maintain the same flow rate, the velocity of the fluid must increase as the cross-sectional area decreases, and vice versa. This can be observed by moving the speed gauge around to different locations inside the pipe and measuring the speed of the fluid at those locations.
As the cross-sectional area of the pipe decreases, the velocity of the fluid will increase, and as the cross-sectional area increases, the velocity of the fluid will decrease.
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In a physics lab, light with a wavelength of 580 nm travels in air from a laser to a photocell in a time of 17.3 ns . When a slab of glass with a thickness of 0.810 m is placed in the light beam, with the beam incident along the normal to the parallel faces of the slab, it takes the light a time of 21.5 ns to travel from the laser to the photocell.What is the wavelength of the light in the glass? Use 3.00×108 m/s for the speed of light in a vacuum. Express your answer using two significant figures.
The the wavelength of the light in the glass is 325.69 nm.
Calculation:-
∧ = 580 nm, t 17.3ns, thickness 0.810 m, 21.5ns, c = 3 x 10⁸m/s.
The new wavelength will be ∧glass = ∧ air x[tex]\frac{ velocity of light glass}{velocity of light in air}[/tex]
The light through the slab of glass 0.8 m takes more time (21.5-17.5) = 4 ns Without slab time taken by the laser light tair = 0.8/3 x 10⁸ = -267 ns
With the stab time taken by the laser light = tglass = 4+2.67-6.67ns
Speed of laser light in glass =0.8/6.67 x 10⁻⁹ = 1.1994 x 10⁸ m/s
Wavelength ∧ glass = 490x1.994 x 10⁸/3 x 10⁸ = 325.69 nm.
Wavelength is the distance between identical points in adjacent cycles of a waveform signal propagating in space or along a wire. Wavelength can be defined as the distance between two consecutive peaks or valleys. Measured in the direction of the wave. Wavelength is the distance between two wave crests and the same for wave troughs.
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Which unit of measure represents frequency and is expressed as the number of cycles per second?
A. Joule
B. Weber
C. Gauss
D. Hertz
Frequency is measured in Hertz, which is defined as the quantity of cycles per second. The best choice is D. Frequency is measured in hertz, a SI unit (Hz). Hertz is hence the standard symbol for the frequency unit.
The frequency of an event is its repetitions per unit of time. As a contrast to spatial frequency, it is also sometimes referred to as temporal frequency, and as a contrast to angular frequency, it is sometimes referred to as ordinary frequency. The International System of Units' unit of frequency, the hertz, equals one occurrence (or cycle) per second. One hertz equals one second, and the hertz is a SI-derived unit whose expression in terms of SI base units is s.
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If a spiral galaxy didn't contain any dark matter at all,
A. its rotation curve would still be flat at large distances.
B. its rotation curve would be decreasing with distance beyond the center of the galaxy.
C. its rotation curve would continue to increase with distance, in correlation to the encircled mass.
B
Its rotation curve would be decreasing with distance beyond the center of the galaxy. Option B.
The stellar mass distribution does not take into account the rotation curve of the galaxy. If a spiral galaxy contained no dark matter at all, its rotation curve would decrease away from the center of the galaxy. This and other evidence have led us to develop our dark matter theory.
Dark matter can only be detected astronomically by its gravitational influence on stars and gases. Dark matter rotates the outer part of the galaxy faster than starlight suggests. This causes the galaxies in the cluster to orbit faster than expected from the combination of galactic starlight. Spiral galaxy rotation curves are the most important tool for determining the mass distribution of spiral galaxies.
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calculate the acceleration due to gravity on the surface of the sun. you can find the relevant data in appendix c of the text.
Use these uncertainties to estimate the biggest and smallest possible values you could get for gravity:
g (low) = 2h / ( t + Δt )²
g(high) = 2h / ( t - Δt )²
What is a simple definition of gravity?The force that pulls items toward the center of a planet and other entity is called gravity. Each of the planets are kept in orbits around the sun by gravity.
Briefing:First, choose an area where you can dump your small thing. Drop from a height that is sufficient to reduce the relative proportion of time needed to start and stop the stopwatch but not excessive enough to start affecting the outcome due to air resistance One narrative is a decent middle ground.
The fall distance of the object is measured in meters. The entire course uses metric measurements only!
At least twenty times, time the thing falling.
Use the relationship to get the earth's acceleration owing to gravity (derived from calculus))
g = 2h / t2
where t is the median fall time and h is the fall height.
To calculate your random uncertainty, use your spread in t values:
Δt = (largest duration – lowest duration) / 2.
g (low) = 2h / ( t + Δt )²
g (high) = 2h / ( t - Δt )²
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Two 460g blocks of wood are 2.0 m apart on a frictionless table. A 12g bullet is fired at 400m/s?
toward the blocks. It passes all the way through the first block, then embeds itself in the second block. Th e speed of the first block immediately after ward is 6.2m/s.
What is the speed of the second block after the bullet stop
When two 460g blocks of wood are placed on a frictionless surface, 2.0 m apart, and the bullet stops, the second block moves at a speed of 2.5 m/s. 400m/s is the velocity of a 12g bullet.
comparison of frictionless synonyms continuous creamy easy effortless flat fluid gentle glossy mild tranquil polished serene
M = 460 g for the block's mass
Blocks are separated by x metres.
The bullet's weight is 12 g.
initial bullet speed = u = 400 m/s
final block velocity was 6.2 m/s.
The bullet's speed as it travels through the first block will initially be determined as follows:
mv + mu = Mv
(12)(400) = 12v+460(6.2) (6.2)
v = 162 m/s
V' = m/(m+M)*162
V' = 12/(12+460) *100
V' = 0.0254*100
V' = 2.5m/s
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A desktop computer is to be cooled by a fan whose flow rate is 0.34 m^3/min. Determine the mass glow rate of air through the fan at an elevation of 3400 m where the air density is 0.7 kg/m^3. Also, if the average velocity of air is not to exceed 110 m/min, determine the diameter of the casing of the fan. Answers: 0.238 kg/min, 6.3 cm
The mass flow rate to cool the desktop computer s 0.238kg/min and if the average velocity does not exceed 110m/min the diameter of fan casing is 6.3 cm.
What is mass flow rate?
The mass of a substance that moves per unit of time is known as the mass flow rate in physics and engineering. In SI units, it is measured in kilograms per second; in US customary measures, it is measured in slugs or pounds per second. The standard symbol is m (pronounced "m-dot"), though (Greek lowercase mu) is also occasionally used. See, for instance, Schaum's Outline of Fluid Mechanics, where mass flow rate is sometimes referred to as mass flux or mass current.
Since its known to us that;
Flow rate V = 0.34 [tex]m^{3}/min[/tex]
density of air ρ = 0.7 [tex]kg/m^{3}[/tex]
average velocity of air [tex]v_{avg}[/tex]= 110 m/min
Mass flow rate is given by
m = ρ x V
m = 0.7 x 0.34
m = 0.238 kg/min
Since Flow rate can be written as
V = A.[tex]v_{avg}[/tex]
Where A denotes Area of cross-section
0.34 = [tex]\frac{\pi d^{2}}{4}[/tex][tex]v_{avg}[/tex]
0.34 =[tex]\frac{\pi }{4} (d^{2})[/tex] x 110
d = 0.0626 m
d= 62.6 = 63 mm
Thus, we conclude that mass flow rate to cool the desktop computer s 0.238kg/min and if the average velocity does not exceed 110m/min the diameter of fan casing is 6.3 cm.
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Problem Statement: Two 8-kg blocks A and B resting on shelves are connected by a rod of negligible mass. Knowing that the magnitude of a horizontal force P applied at C is slowly increased from zero, determine the value of P for which motion occurs, and what that motion is, when the coefficient of static friction between all surfaces is (a) js = 0.40, (b) ps = 0.50. Figure: с P 100 mm B 8 kg -200 mm 25° AO 8 kg
In comparison to protons and neutrons, electrons have a very low mass (9.10938356 10 31 kg). An electron weighs about 1837 times as much as a proton, with a mass of (1.67262191027kg). Atoms' nuclei almost entirely account for their mass. There are only protons and neutrons present inside the nucleus.
In physics, what is insignificant?
Negligible refers to the ability to ignore or neglect. There are occasions when a force in physics is so little that its impact on the overall phenomenon is negligible. When you throw an apple up, for instance, the apple draws the earth, yet the earth does not move because the force the apple exerts is very little or inconsequential.
Why is mass so small?
If object A weighs 1 gram and object B weighs 1 kilogram, then object A is said to have a negligible mass in comparison to object B because it weighs so little. In mathematical problems, we typically neglect trivial values to avoid adding complexity.
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list and briefly define the 7 perspective/models of psychology
Cognitive, behavioral, psychodynamic, humanistic, biological, sociocultural, and evolutionary views are the perspective of psychology
How does psychology define and explain it from many angles?There are various psychological perspectives on and explanations for human behavior. When examining how people think, feel, and behave, psychologists draw on a range of views.
4 main psychological viewpoints
Psychoanalytical Viewpoint.Humanistic viewpointPerspective on traits.Social Cognitive Viewpoint.The majority of ideas and studies that aim to comprehend the cognitive, emotional, and behavioral processes that humans encounter on a daily basis are built around these objectives.
Cognitive, behavioral, psychodynamic, humanistic, biological, sociocultural, and evolutionary views are the main ones in psychology that have recently arisen.
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Generally, the maximum static friction force is greater than the kinetic frictional force. In which of these situations is this invalid? None of the other answers is correct since the rule is never violated. One of the bodies is moving with a very low velocity over the surface of the other. The normal pressure is very low. The normal pressure is very high.
None of the other answers is correct since the rule is never violated.(Option A).
Static and dynamic friction, When two systems are in contact with each other and at rest, the friction between them is called static friction. When two systems are in contact and moving relative to each other, the friction between them is called kinetic friction.The force required to induce motion (ie, overcome static friction) is greater than the force required to sustain motion (ie, overcome kinetic friction). Therefore, the sliding friction coefficient (μk) is smaller than the static friction coefficient (μs).
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12. Calculate the potential difference that would be shown by the voltmeters shown in the circuits below. PLEASE ANSWER FAST
Answer: It is D
Explanation:
Divide the potential difference by the current to obtain the wire resistance. 20. Power A circuit has 12 of resistance and is connected to a 12-V battery.
when light passes from a material with a high index of refraction into material with a low index of refraction: is the meaning of?
When light passes from a material with a high index of refraction into material with a low index of refraction, it is the meaning of a)incident angle. So, correct option is a.
Refraction of light is quite possibly of the most regularly noticed peculiarity, however different waves like sound waves and water waves additionally experience refraction. Refraction makes it feasible for us to have optical instruments, for example, amplifying glasses, focal points and crystals. It is likewise a direct result of the refraction of light that we can shine light on our retina.
The refractive file, additionally called the record of refraction, depicts how quick light goes through the material.
The refractive index is dimensionless in nature. For a given material, the refractive record is the proportion between the speed of light in a vacuum (c) and the speed of light in the medium (v). On the off chance that the refractive record for a medium is addressed by n, it is given by the accompanying recipe:
n=c/v
where n is refractive index, c is the speed of light in vacuum and v is the speed of light in other medium.
Hence, correct option is a.
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(Complete question) is:
when light passes from a material with a high index of refraction into material with a low index of refraction: it is the meaning of?
a)incident angle
b)speed of light
c)refraction angle
d)all of the above
complete the following statement using the choices below. air moves out of the lungs when the pressure inside the lungs is . group of answer choices less than the pressure in the atmosphere equal to the pressure in the atmosphere greater than the intra-alveolar pressure greater than the pressure in the atmosphere
Air moves out of the lungs when the pressure inside the lungs is greater than the pressure in the atmosphere equal to the pressure in the atmosphere less than the pressure in the atmosphere greater than the pressure in the atmosphere greater than the intra-alveolar pressure.
When a force is applied to a substance's limits in a given amount of space, it is known as pressure. Newton per square meter, sometimes known as a pascal, is the accepted SI unit for pressure (Pa). Mathematically:
p = F/A
where
the pressure, p
F is the standard force.
The boundary's surface area is A.
In most cases, a substance's molecules colliding with the system's borders is what produces pressure, also known as the force applied per unit area to a substance's boundaries. The walls attempt to move outward as a result of the pressures that molecules try to push upon impact with them. The pressure that a system puts on its surroundings is brought about by the forces generated by all of these encounters. applying intense pressure.
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a lightweight rope is wrapped around a 100 lb drum, passes over a frictionless pulley, and is attached to a weight w (see below). the coefficient of friction between the drum and the surfaces is 0.50. determine the maximum amount of weight that can be supported by this arrangement.
The forces that are present when there is physical contact are referred to as the contact force and the forces that are present when there is no physical contact as the field force or non-contact force.
On the hanging weight since it is the constant speed we can assume that object is in equilibrium and
Tension = m*g
Where m = mass and g = acceleration due to gravity
On the drum since it is also moving with constant angular speed net torque on it will be zero.
τ - TR =0
Where τ = torque, T= tension and R= Radius of drum = 0.5 m
Replacing the expression for Tension of the rope in above equation:
τ(torque) = mgR
Solving for m using R = 0.5m, g = 10 m/ s2 and τ = 358 N.m
m = = 179 kg
Therefore the mass is -179 kg of the torque produced by the rope.
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The dynamo theory states that Earth's magnetic field is created in the ...
The dynamo theory states that Earth's magnetic field is created in the planet's outer core.
The dynamo theory proposes a mechanism by which a celestial body such as the Earth or a star generates a magnetic field.
Dynamo theory describes the process through which a rotating, convecting and electrically conducting fluid acts to maintain a magnetic field. This theory is used to explain the presence of anomalously long-lived magnetic fields in astrophysical bodies.
There are three requisites for a dynamo to operate:
An electrically conductive fluid medium, Kinetic energy provided by planetary rotation, An internal energy source to drive convective motions within the fluid.
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If an object's velocity is doubled, its momentum isA) halved.B) unchanged.C) doubled.D) quadrupled.E) dependent on its acceleration.
If you increase either mass or velocity, the momentum of the object increases proportionally. If you double the mass or velocity you double the momentum.
what is momentum?
As momentum depends on both velocity and the direction of the body's motion, it is quantified by "mass velocity". Since velocity is a vector and mass is a scalar, momentum is a vector quantity. Mass times speed equals momentum.
"The motion of an item equal to the product of its mass and its velocity" is referred to as momentum. When something is said to have momentum, it refers to its unique mass and direction of motion.
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part a part complete what is the amplitude of this wave? express your answer in centimeters to two significant figures. a
The particle's maximum displacement from its mean position is measured by its amplitude, which in the graph equals 6 cm. The wavelength is 1.20 nm, and the frequency is 1.67 hz.
A periodic wave's wavelength, or the distance over which the wave's shape repeats, is its spatial period. It is the separation between adjacent spots on a wave that correspond to the same phase. Displacement refers to the idea that something has moved or been shifted. The term "displacement" refers to a shift in an object's position. The following equation serves as a mathematical definition of it: is used to describe the final position's value.
f = 1/T f = 1/0.6 f = 1.67 mHz is the frequency.
Wavelength and frequency are combined to form the wave's speed.
v = f (lamda) lamda = v/f
lamda = v/f
lamda = 2/1.67
lamda = 1.20m
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The complete question is -
part a part complete what is the amplitude of this wave? express your answer in centimeters to two significant figures.
A) What is the amplitude of this wave?
B) What is the frequency of this wave? Express your answer to three significant figures and include the appropriate units.
C) What is the wavelength of this wave?
A series of four direct shear tests were conducted on a dry sand. The initial size of the specimens were 50 mm by 50 mm (in horizontal plane) and 20 mm high. The following test results were reported. Test Number Vertical stress (kPa) 50 100 200 400 Shear Stress at Failure (kPa) 35.5 71 142 284 Plot the test results in normal stress-shear stress space, draw the best-fit Mohr-Coulomb failure envelope, and report the friction angle. [Note: assume that the cohesion intercept is zero.] Friction angle (degrees)
35.375 degrees is the friction angle. Four direct shear tests were performed for on a dry sand. The specimens were 50 mm by 50 mm in size at first.
Angle of internal friction, often known as friction angle, is a parameter indicating how well a unit of rock or soil can sustain a shear force. When failure simply results from a shearing stress, an angle (), measured between the normal force (N) and resultant force (R), is reached ( S ). A shear test is intended to exert stress on a test sample so that it slides out of alignment with the applied forces along a plane.
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there are two equations used to calculate the heat gained/lost by a substance. match each equation to its correct application. heating or cooling during a phase change: q = nΔHochangeheating or cooling within a phase if mass is given: q = msΔT
Phase changes can be accompanied by heating or cooling: q = nHochange, If the mass is known, heating or cooling will occur within a phase. q = msΔT
What does the word "heated" mean?the method or tools used to heat something, especially a building: heating costs/oil/efficiency. A shift in heat is always accompanied by a phase change.
What is heating or temperature?Heat is a measurement of change, never a quality that an item or system possesses. It is categorized as a step input as a result. Temperature can be expressed in Celsius (°C), Kelvin (K), Fahrenheit (°F), or Rankine units and indicates overall average kinetic energy of particles inside a substance or system (R).
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General Questions: In a collision between a huge SUV and a small hybrid car, the SUV exerts a larger force on the hybrid than the hybrid exerts on the SUV. A True O B. False C. It depends on whether the collision is a head-on collision or a rear-end collision. D. It depends on which car moves faster
'In a collision between a huge SUV and a small hybrid car, the SUV exerts a larger force on the hybrid than the hybrid exerts on the SUV' is false.
Every action has an equal and opposite response, according to Newton's third law of motion.
The above law says that, forces on both the vehicles are equal and opposite.
So, the force exerted by a huge SUV and a small hybrid car are the same. And SUV does not exert a larger force as it is huge.
Impact on both the vehicles is also same as the impulse is nothing but the force multiplied by the time of contact. The time of contact is same for both vehicles.
Thus, the above statement is false.
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What is the distance between Earth and sun if light travels at 300000 km/s and takes 8 mins to reach Earth?; How long can light travel in 300000 km?; Does light travel 300000 km per second?; What is the distance of the sun from the Earth * 7 light minutes 8 light minutes 9 light minutes 10 light minutes?
On average, the Sun is located around 93,000,000 miles (150 million kilometers) from Earth. It is so far away that it takes roughly 8 minutes for the Sun's light, which is moving at a speed of 186,000 miles per second (300,000 kilometers per second), to reach us.
If sunlight needs 8.3 minutes to reach Earth, how far away is Earth from the Sun?The Sun is only 8.3 light minutes away from Earth, or 1.5781e-5 light years, since light travels from the photosphere of the Sun to the Earth in only 8.3 minutes.
In 300000 kilometers, how far can light travel?The distance light travels in a year is measured in light-years. Light travels 5.88 trillion miles and 186,000 miles per second through interstellar space.
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the output of the supply must be electrically isolated from the source and must contain some type of switching converter. the system is to use a feedback control to maintain proper output voltage throughout the full range of input voltages and frequencies.
The supply's output must have some sort of switching converter and must be electrically insulated from the source. Throughout the whole range of input voltages and frequencies, the system is to apply a feedback control to ensure proper output voltage.
Voltage, also referred to as electric tension, electric pressure, or (electric) potential difference, is the difference in electric potential between two places. It is equivalent to the labor required to transfer a test charge between two places in a static electric field. The derived unit for voltage in the metric system is referred to as a volt. One volt equals one joule (of work) for one coulomb, which is how to work per unit charge is defined in SI units (of charge). Power and current were employed in the earlier SI definition for the volt; starting in 1990, the quantum Hall and Josephson effect was applied; and most recently (as of 2019), fundamental physical constants were added to the definitions of all SI units and their derivative units.
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If you are learning to juggle it would be good to slow the ball's acceleration. You can do this by using: A. Lighter balls B. Heavier balls C. More balls D. None of the above
The answer is None of the above.
What is acceleration?
Acceleration is the rate at which velocity changes over time, both in terms of speed and direction. A point or object travelling in a straight path is accelerated if it accelerates or decelerates.
The acceleration imparted to objects as a result of the combined influence of gravitation and centrifugal force.
During juggling, there is no way to slow down ball's acceleration. Gravity acts as a downward acceleration force as soon as a ball is thrown into the air. The only way a juggler may slow down a pattern is by changing the height of his throws because the acceleration of gravity is constant.
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Each metal is illuminated with 400 nm (3.10 eV) light. Rank the metals on the basis of the maximum kinetic energy of the emitted electrons. (If no electrons are emitted from a metal, the maximum kinetic energy is zero, so rank that metal as smallest.) Rank from largest to smallest. To rank items as equivalent, overlap them. The correct ranking cannot be determined.
The metals on the basis of the maximum kinetic energy of the emitted electrons is Cesium > potasium > Beryllium = aluminum = Megnesium = Platinum.
From Einstein photo electic effect equation
E = 3.1 eV
E = Wo+ Kmax
Kmax = E - Wo
For Be: E< Wo, Kmax = 0
There is no emission of photo electron
For K : Kmax = 3.1 -2.3 = 0.8 eV
For Al : E< Wo, Kmax = 0
There is no emission of photo electron
For Mg: E< Wo, Kmax = 0
There is no emission of photo electron
For Cs: Kmax = 3.1 -2.1 = 1.0 eV
For Pt : E< Wo, Kmax = 0
There is no emission of photo electron
Cesium > potasium > Beryllium = aluminum = Megnesium = Platinum
Einstein photo electic effect:
Einstein said that energy is a beam of particles related to frequency according to Planck's formula. When this beam is directed at a metal, photons collide with atoms. If the photon frequency is high enough to knock off an electron, the collision will produce the photoelectric effect.
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The Ups & Downs of Thermometers (liquid)
Fill in the missing blanks in the paragraph:
The level of the liquid in the thermometer goes (up, down) when (heated, cooled) because molecules are moving (faster, slower) and take up (more, less) space.
Need help? Use this animation (click Hot, Cold & Room Temp. tabs & read text on left)
The level of the liquid in the thermometer goes up when heated because molecules are moving faster, and take up more space.
What is a thermometer?A thermometer is described a device that measures temperature or a temperature gradient. A thermometer has two important elements:
a temperature sensor in which some change occurs with a change in temperature and a sensor which is a medium of converting this change into a numerical value.The purpose of a thermometer is that it is an instrument that measures temperature and can measure the temperature of a solid such as food, a liquid such as water, or a gas such as air.
The working of a thermometer is described as follows:
When the tip of the mercury thermometer touches the material/ or surface it is measuring, the material conducts heat energy to the mercury causing the mercury to expands as it turns into a liquid and begins to rise up the tube. The place where the mercury stops on the scale is where you can take the reading of the temperature.
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An ideal gas with enough molecules to make NkB equal to 5.5 J/K undergoes an isothermal expansion at 475 K .
Part B: How much heat is absorbed by the gas if the final pressure value is such that pfpi= 0.16 ?
0.27 10 23 particles are equal to 6.022 10 23 22.4. Consequently, there are 0.27 1023 molecules in 1 liter of any gas at S.T.P.
What make up an ideal gas' molecules?
The molecules of an ideal gas have no volume.
The molecules of the gas take up volume because they spread out over a broad area of space, whereas the molecules of an ideal gas are modeled as point particles with no volume on their own.
What three premises apply to an ideal gas?
There are four guiding principles that determine if a gas is "ideal": The volume of the gas particles is quite small. The gas particles are of similar size and do not interact with one another through intermolecular forces (attraction or repulsion). The random motion of the gas particles is consistent with Newton's Laws of Motion.
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