(a) time taken for the car to accelerate from v to 2v = t = [tex]\frac{2V-V}{a}[/tex]
(b) velocity of the car moving at 2t seconds = ΔV = 2at
(a) we know that,
a=[tex]\frac{V_{F}-V_{0} }{t}[/tex]
where, [tex]V_{F}[/tex] is the final velocity
[tex]V_{0}[/tex] is the initial velocity
a = acceleration
t = time
Time taken to accelerate from V to 2V:
t = [tex]\frac{2V-V}{a}[/tex]
(b) We know that,
a=[tex]\frac{V_{F}-V_{0} }{t}[/tex]
where, [tex]V_{F}[/tex] is the final velocity
[tex]V_{0}[/tex] is the initial velocity
a = acceleration
t = time
how fast is the car moving at 2t seconds after starting,
we can represent [tex]V_{F}[/tex] - [tex]V_{0}[/tex] = ΔV
at time = t= 2t, it becomes
a=[tex]\frac{V_{F}-V_{0} }{t}[/tex] = a = ΔV/2t
t= ΔV/2a
ΔV = 2at
What is acceleration?Rate of change of velocity with time, both in terms of speed and direction is known as acceleration.
What is speed?the rate at which an object's location changes in any direction. The distance traveled in relation to the time it took to travel that distance is how speed is defined. Since speed simply has a direction and no magnitude, it is a scalar quantity.To learn more about acceleration visit:
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Copernicus's model of the universe differs from Ptolemy's because Copernicus believed
Copernicus's model of the universe differs from Ptolemy's because Copernicus believed the Sun is at the center of the universe and majority of the bodies in the universe revolves around the Sun.
What is the Universe?The universe is defined as the open place that contains the planets, stars, galaxies, and all other forms of matter and energy.
There are different models of the universe including which contains the Copernicus's model and Ptolemy's model.
The Copernicus's model of the universe differs from Ptolemy's because Copernicus believed the Sun is at the center of the universe and majority of the bodies in the universe revolves around the Sun.
While the Ptolemy's model of the universe differs from the Copernicus's model because Ptolemy believed that the Earth is at the center of the universe and everything in the universe revolves around the Earth.
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If you drop an object, it will accelerate downward at a rate of 9.8 meters per second per second. if you instead throw it downwards, its acceleration (in the absence of air resistance) will be?
In the absence of air resistance or any other force on it, an object's acceleration is the acceleration of gravity ... 9.8 m/s² downward.
It doesn't matter if the object rolled off a table, or fell out of an eagle's mouth, or got shot straight up out of a cannon, or LeBron threw it at the basket for a 3-pointer, or Justin Tucker kicked it for a field goal, or Tiger Woods chipped it for a bogey, or Billy Joe MacAllister heaved it straight down off the Tallahatchie Bridge with all his strength.
It doesn't matter how it got STARTED moving, or how fast it's going right now, or what direction it's going now.
If there's no air resistance, and no OTHER force on the object that can speed it up or slow it down, then it's in "free fall", and it's accelerating at 9.8 m/s² downward.
The size and direction of its MOTION doesn't matter. But the size and direction of its acceleration is 9.8 m/s² straight down.
a. Besides protons, what other particles make up an atom? Write 2 - 3 sentences identifying the attractive force acts between a proton and each of these other particles.
b. Identify the element whose atoms have 11 protons. It is a metal, nonmetal, or metalloid? Write 1 - 2 sentences describing how an atom of this element changes when it forms an ionic bond.
Electric force is present between proton and electron of an atom.
What is the attractive force present between a proton and electron?The attractive force between the electrons and the proton of the nucleus is called the electric force. This force attract electron towards the nucleus so that it can't escape from the atom easily so this force is very important for the atom.
How an atom of this element changes when it forms an ionic bond?An atom of this element changes when it forms an ionic bond because the number of electron decreases due to losing of electron in order to get stability. We know that ionic bond forms between atoms when electron is lost or gain by the atom.
So we can conclude that electric force is present between proton and electron of an atom.
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Bootes is a constellation found near __________________
-The Big Dipper
-Orion
-Taurus
Answer:
The Big Dipper
Explanation:
Bootes is near the "Big Dipper" which is itself part of Ursa Major.
Please help! I need this due for homework.
Explanation:
I don't know the exact word which u have to put in the blank spaces.
But Newton's Third Law States:
If a force is exerted there will always be an equal and opposite reactive force.
If a particle with a charge of 2 coulombs moves through a potential difference of 12 volts, its change in kinetic energy will a have magnitude of__________.
The work done per unit charge is 24 joule
what is work done?
Measure of energy transfer that occurs when an object is moved over a distance by an external force at least part of which is applied in the direction of the displacement.
The potential difference across the two points is directly proportional to the work done per unit charge.
V=W/Q
where,
V=potential difference
W=work done
Q=charge
W=Q×V
given:
Q=2 coulomb
V=12 volt
W=2×12
W=24 joule
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Does the principle of optical reversibility hold for reflection as well as refraction? explain
Yes , principle of optical reversibility hold for reflection as well as refraction
Reflection involves a change in direction of waves when they bounce off a barrier. Refraction of waves involves a change in the direction of waves as they pass from one medium to another. Refraction, or the bending of the path of the waves, is accompanied by a change in speed and wavelength of the waves.
The principle of reversibility of light states that light follows the same path if the direction of the travel of light is reversed.
This means that if a light ray travels from medium 1 to medium 2 and has angle of incidence and angle of refraction as i and r respectively, then if the light is incident from medium 2 at an angle r, then the angle of refraction in medium 1 will be i.
The principle of reversibility presumes that the attenuation of a light ray during its passage through an optical medium because of reflection, refraction, and absorption is not affected by a reversal of the direction of the ray.
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When marking the fixed points on a thermometer, it is observed that at 0oC,
the mercury thread is of length 1cm and 6cm at 100oC. What temperature would
correspond to a length of 4cm?
The temperature corresponds to a length of 4cm is 80°C.
To find the answer, we need to know about the thermometers.
How to find the temperature corresponds to 4cm?An instrument for measuring and indicating temperature, typically one that consists of a short, hermetically sealed glass tube with graduation markings and a mercury or alcohol-filled bulb at one end that expands along the tube as it measures temperature is called Thermometer.Given that the temperature coincides with the 1cm line is 0 degree Celsius, and that of 6cm is 100 degrees Celsius.Thus, the separation between these two temperatures will be,[tex]d=6cm-1cm=5cm[/tex]
This separation is 5cm, for 100-unit difference of temperature.Thus,[tex]1cm=\frac{100}{5}=20^0C[/tex]
Thus, 4cm corresponds to a temperature,[tex]T=4*20=80^0C[/tex]
Thus, we can conclude that the 4cm line corresponds to a temperature of 80°C.
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Determine the shortest frequency of light required to remove an electron from a sample of ti metal if the binding energy of titanium is 3. 14 × 10^3 kj/mol
The shortest frequency of light required to remove an electron from a sample of ti metal if the binding energy of titanium is 3. 14 × [tex]10^{3}[/tex] kj/mol will be v = 0.47 * [tex]10^{37}[/tex] Hz
Binding energy, amount of energy required to separate a particle from a system of particles or to disperse all the particles of the system. Binding energy is especially applicable to subatomic particles in atomic nuclei, to electrons bound to nuclei in atoms, and to atoms and ions bound together in crystals.
Work function is defined as the minimum amount of energy needed to remove an electron from the atom. So, the minimum energy required to remove an electron is called the Work function.
plank's constant = 6.62 × [tex]10^{-34}[/tex] [tex]m^{2}[/tex] kg/s
Binding energy = 3. 14 × [tex]10^{3}[/tex] kj/mol
Energy = plank's constant * frequency
3. 14 × [tex]10^{3}[/tex] = 6.62 × [tex]10^{-34}[/tex] * v
v = 3. 14 × [tex]10^{3}[/tex] / 6.62 × [tex]10^{-34}[/tex]
v = 0.47 * [tex]10^{37}[/tex] Hz
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What is the instantaneous value of a 10 ampere peak sine wave at 0, 30, 45, 60, and 180 degrees?
The instantaneous value of a sinusoidal waveform is the value of the alternating function at any particular instant.
The instantaneous value of a 10 ampere peak sine wave at 0, 30, 45, 60, and 180 degree are 0 A, 5 A, 7.07 A, 8.66 A, 0 A respectively.
From the question,
Instantaneous value is given as 10 A
The instantaneous value of a sine waveform is determined by the relation,
Instantaneous value = Peak value x sin θ
Substituting values in the above equation;
For 0°⇒
instantaneous value = 10 x sin 0°
= 10 x 0
= 0 A
For 30°⇒
instantaneous value = 10 x sin 30°
= 10 x (1/2)
= 5 A
For 45°⇒
instantaneous value = 10 x sin 45°
= 10 x (1/√2)
= 10 x 0.707
= 7.07 A
For 60° ⇒
instantaneous value = 10 x sin 60°
= 10 x (√3 / 2 )
= 10 x 0.866
= 8.66 A
For 180° ⇒
instantaneous value = 10 x sin 180°
= 10 x 0
= 0 A
Hence the instantaneous value of a 10 ampere peak sine wave at 0, 30, 45, 60, and 180 degree are 0 A, 5 A, 7.07 A, 8.66 A, 0 A respectively.
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Gold’s natural state has a shape and a define volume that is gold’s natural state
Answer:
Gold's natural state has a definite shape and a definite volume. Gold's natural state is solid.In nature, gold most often occurs in metallic form, alloyed with silver.steel is
almost entirely of iron atoms,
but it is denser than iron.
Suggest
reason for this.
Steel is denser than iron because it has carbon atoms entangled inside the latticework of iron atoms.
What is the difference between iron and steel?Iron is first and foremost an element, whereas steel is an alloy of iron and carbon. The amount of iron is higher in this alloy, though. Steel can be alloyed with various other metals to create materials with various qualities. For instance, stainless steel is produced when chromium is added to steel. It resists rusting quickly and is enduring. Steel is extensively used in the building sector. This is so because steel has better compression and tension properties than iron and is stronger than iron.By examining the carbon percentage, another difference can be seen. Steel is iron that includes less than two percent carbon, whereas pig iron contains more than two percent carbon. Pig iron is produced in a blast furnace by processing iron ore and coke. Steel is produced by further processing this pig iron to lower the carbon content in multiple furnaces. Steel may now be treated further to produce a variety of alloys. Elements such as silicon, manganese, and chromium are added to create alloys.Looking back in time, it is unclear exactly when the technology for manufacturing iron was developed. However, according to some archaeological discoveries, iron was reportedly utilized to make tools in Egypt about 3000 BC. A little later, about 1000 BC, the Greeks produced weapons made of hardened iron. Thus, up until 1400 AD, all other types of made iron could be grouped under the heading of wrought iron. The size of the furnaces used in smelting only rose after the fourteenth century. The upper portion of these furnaces was pushed with iron. It was turned into metallic iron and then exposed to carbon-rich vapors via a blast so that it would absorb them.Steel is denser than iron because it has carbon atoms entangled inside the latticework of iron atoms.
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Steel have carbon atoms which are interlocked within the lattice work of the iron atoms that's why steel is more denser than iron.
What are Alloy steel?
It is a type of steel in which the steel is combined with several elements such as Nickel, molybdenum, vanadium, chromium, silicon.
By adulteration in elements make them hard , tough, increase their strength, wear resistance.
These steel are used in electrical furnace . Steel is also an alloy.
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What happens as the aperture of a camera gets larger?
Options:
A. Less light passes through
B. More light is refracted
C. Less light is refracted
D. More light passes through
Answer: more light passes through
Explanation:
a lamp marked 100w 250v is lit up for 10hours, costs 2I what is the cost of lighting the lamp
Answer:
2k
Explanation:
100W X 10h = 1000Wh = 1KWh thus cost is 2k
Which of the following describe advantages of using radio waves over other electromagnetic waves to transmit information to Earth? Select ALL that apply.
A
Radio waves travel faster.
B
Radio waves take less energy to produce.
C
Radio waves transmit more types of information.
D
Radio waves have a lower frequency, which makes them safer for humans.
E
Radio waves have higher energy, which makes their signal easier to capture.
The correct options are:
D
"Radio waves have a lower frequency, which makes them safer for humans."
B
"Radio waves take less energy to produce."
Why do we radio waves over other electromagnetic waves to transmit information to Earth?
Radio waves are electromagnetic waves with frequencies on the range from 10 KHz to 10 THz.
Now, remember that all electromagnetic waves have the same speed, which is the speed of light, and the energy of a wave is proportional to its frequency.
Particularly, we can see that radio waves have small frequencies (smaller than infrared light) so these waves carry very little energy.
With that in mind, the correct options are.
D
"Radio waves have a lower frequency, which makes them safer for humans."
B
"Radio waves take less energy to produce."
These are the two main reasons of why we use radio waves.
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What is the magnitude of the magnetic field at the point the center of a long, straight solenoid; the solenoid carries current 0.300 A and has 4.00 * 103 windings per meter
The magnitude of the magnetic field at the point at the center of a long, straight solenoid if the solenoid carries a current of 0.300 A and has 4.00 ×10³ windings per meter would be 1.512 ×10⁻³ N/Amps m
What is a magnetic field?A magnetic field could be understood as an area around a magnet, magnetic material, or an electric charge in which magnetic force is exerted. The SI unit of the magnetic field is tesla.
The magnetic field at the point at the center of a long, straight solenoid can be calculated by using the formula
B = μnI
where B is the magnetic field
μ is the Permeability constant having a value of 1.26 × 10⁻⁶ T/m
n is the number of winding per meter
I represent the current
By substituting the respective value in the formula
B=( 1.26 × 10⁻⁶ )× (4.00 ×10³)×0.300
B =1.512 ×10⁻³ N/Amps m
Thus, the magnitude of the magnetic field at the point at the center of a long, straight solenoid would be 1.512 ×10⁻³ N/Amps m.
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What's true about the elliptical path that the planets follow around the sun?
Answer:
well, it is not a solid path and thats a teeny tiny fact
Officials want to reduce the possibility of oil leaks into bodies of freshwater drinking sources. therefore, the government insists that oil refineries undergo monthly inspections. for what reason would the government regulate monthly inspections at oil refineries? save the refinery money increase domestic oil production protect the public from pollution encourage foreign oil imports to drive down prices
Answer:
protect public from pollution
Explanation: got it right
An object is thrown upwards with a speed of 16 m/s. how long does it take it to reach a height of 7.0 m on the way up? neglect air resistance.
Given:
initial velocity,u=16m/s
final velocity,v=0m/s
acceleration due to gravity,a=9.8 m/s²
height,h=7m
To find:
time taken,t
we can find the time taken by using second equation of motion as well as first equation of motion,so we use first equation of motion.
v=u+at
substitute the values,we get
0=16+(-9.8)×t
-16=-9.8×t
t=-16/-9.8
t=16/9.8
t=1.63s
Therefore,the time to reach the height of 7m is 1.63s
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A clock on a moving spacecraft runs 1s slower per day relative to an identical clock on earth. What is the relative speed of the spacecraft?
The craft is moving at a speed of v = 0.024c or around 7 million metres per second or 16 million miles per hour.
The time dilation factor is equal to 3600/3599 if we only want 3599 seconds of the craft's time to pass for every hour (3600 seconds) of Earth time. However, there is a connection as well.
γ = [tex]\frac{3600}{3599}[/tex] = Dilation factor
Also, γ = 1/ √[tex]1-v^{2}[/tex]/[tex]c^{2}[/tex]
which we can solve algebrically to yield,
[tex]\frac{v}{c}[/tex] = √1-1/γ[tex]^{2}[/tex]
we get,
[tex]\frac{v}{c}[/tex] = 0.024
v= 0.024c
Accordingly, the craft is moving at a speed of v = 0.024c, or around 7 million metres per second or 16 million miles per hour.
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Ten seconds after starting from rest, a car is moving at 60 m/s. what is the carâs acceleration?
Ten seconds after starting from rest, a car is moving at 60 m/s. what is the cars acceleration? 6 m/s^2
What is acceleration?
Average acceleration= (final velocity-initial velocity)/time
The rate at which an object's velocity with respect to time changes is referred to as acceleration in mechanics. It is a vector quantity to accelerate (in that they have magnitude and direction). The direction of the net force acting on an object determines the direction of its acceleration. According to Newton's Second Law, an object's acceleration is the result of two factors working together: the object's mass, which varies depending on the materials it is made of, and the net balance of all external forces acting on it. The magnitude of an object's acceleration is inversely proportional to the object's mass.
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An object travels 12 m in the 1st second of travel, 12 m again during the 2nd second of travel, and 12 m again during the 3rd second. Its acceleration is therefore ___ m/s2.
0 m/s^2.
An object travels 12 m in the 1st second of travel, 12 m again during the 2nd second of travel, and 12 m again during the 3rd second. Its acceleration is therefore 0 m/s2.
Given
In First second object travels 12 m
in second second it travels 12 m
In 3rd second it travels 12 m
After observation, the object travels the same distance in the same amount of time, indicating constant velocity motion in a straight line with no acceleration.
Therefore acceleration = 0 m/s^2
What is acceleration?Rate of change of velocity with time, both in terms of speed and direction is known as acceleration. A point or object going straight ahead is accelerated when it accelerates or decelerates.To learn more about acceleration visit:
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During which stage of technological design did shuman identify that using oil and coal would be a problem?
First stage of technological design did shuman identify that using oil and coal would be a problem.
What is part of the first stage in the process of technological design?
The technological design process involves the steps of identifying an issue, researching it, coming up with potential solutions, choosing the best one, building a model, testing it, making adjustments as necessary, and communicating the final answer.
What is part of the fourth stage in the process of technological design?
The four stages of technological design include identifying a need, designing and implementing a solution, and evaluating the solution.
Steps in the Technological Design Process-
Identify the problem. For any new technology to come into existence, there needs to be a need or a desire. Research the problem.Generate possible solutions.Select the best solution.Learn more about Technological Design Process
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A mass m is attached to an ideal massless spring with spring constant k. In experiment 1 the mass oscillates with amplitude a, and period t. A student grabs the mass and brings it to rest before starting experiment 2. In experiment 2, the mass is set to oscillate with a larger amplitude of 3a. What is the period of the oscillation in experiment 2?.
The answer is time period of spring mass system does not depend on its amplitude.
Does the oscillation's amplitude affect the period?The period does not depend on the Amplitude. The greater the amplitude, the more the distance to be covered, but it will do so more quickly. The period won't change since the effects of distance and speed cancel each other out. As the amplitude rises, the mass moves farther with each cycle. Therefore, increasing the amplitude has no overall impact on the oscillation's period.
What is oscillation?A kind of energy called sound is created when objects vibrate. For it to spread, a medium is needed. As a result, sound cannot travel through a vacuum because there is nothing for the sound waves to travel through. The object's back and forth movement creates the sound. Sound vibration is the name for this. Additionally called oscillatory motion. Oscillation describes the regular rhythmic back-and-forth movement.
What is amplitude and time period of oscillation?The time required to complete a task is referred to as a period. An occurrence is referred to as periodic if it happens frequently. The period is the length of time it takes for a periodic event to repeat itself. The particle's time period is determined by how long it takes it to complete one vibration cycle.
A sound wave's amplitude measures the height of the wave. When a sound is made, the maximum displacement of the medium's vibrating particles from their mean position determines the amplitude of the sound wave. It is the separation between the wave's crest or trough and its mean location.
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Briefly explain how einstein's special theory of relativity explains the perpendicular (right hand screw like) behavior of moving charges without recourse to invoking the concept of a magnetic field.
Einstein's special theory of relativity explains that the electric and magnetic fields are both can formulate together in mathematically.
It is given Einstein's special theory of relativity.
It is find the Einstein's special theory of relativity explains the perpendicular behavior of moving charges without recourse to invoking the concept of a magnetic field.
What is Einstein's special theory of relativity?
As we know that one charge creates a field and its that field that actually exerts a force on the other charge. Here we it gives the relationship of two fields like electric field and magnetic field and gives the formula for electromagnetic objects.
Special relativity fixes the problem by the points that the magnetic force in one frame of reference easily be an electric force in other and also some of the combination of them in a frame.
Thus, Einstein's special theory of relativity explains that the electric and magnetic fields are both can formulae together in mathematically.
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The height of the 500-mb pressure level plotted at North Platte (LBF) in western Nebraska was ______ m above sea level (denoted 555).
The height of the 500-mb pressure level plotted at North Platte (LBF) in western Nebraska was 5,570 meters m above sea level.
What is pressure?
Pressure is the force applied perpendicular to the surface of an object per unit area over which that force is distributed.
Pressure level plotted at North PlatteRecalling that the heights plotted at individual stations on 500-mb maps are in tens of meters (place a 0 to the right of the three plotted digits).
The coded height at North Platte, in west-central Nebraska, ("557") indicated 500 mb occurred at 5,570 meters above sea level.
Thus, The height of the 500-mb pressure level plotted at North Platte (LBF) in western Nebraska was 5,570 meters m above sea level.
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1. The weight of body in air is 20N displaced 5N when emerged into water. The mass of body in water is ??
Answer:
5 N
Explanation:
Archimedes' principle indicates that the upward buoyant force that is exerted on a body immersed in a fluid, whether fully or partially submerged, is equal to the weight of the fluid that the body displaces.
In this case, The weight of an object in air is 20N and it weighs x N when fully immersed in water. So, the weight of the water displaced is given as;
20 − x = 5
Therefore, the weight of the body in water is 5 N.
What is the maximum theoretical efficiency possible for an engine operating between 100°c and 400°c?
44.58% is the maximum theoretical efficiency possible for an engine operating between 100°c and 400°c
The ratio of useful work completed to heat produced is used to determine an engine's efficiency. is the task finished.
Please be aware that the phrase "work done" refers to the force applied to the clutch or driveshaft. This implies that the work produced by thermodynamic expansion is reduced by the friction and other losses.
Given
T1 = 100 +273 = 373K
T2 = 400 + 273 = 673 K
Formula for efficiency = (T2 -T1/T2) × 100
Put the values of T1 and T2
We get
Efficiency = (673 - 373 /673) × 100
Efficiency = 44.58%
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What effect does the magnetic field have on the speed of the proton? does the proton move faster in one region than the other? why or why not?
Answer:
1. A proton's magnetic moment arises from a fundamental quantum property called spin, which causes the proton to behave as a tiny bar magnet with a north and a south pole. When placed in an external magnetic field, the proton's spin can either align with the field or flip to orient itself against the field
2. The force can change the direction (velocity) of the proton but not its speed (magnitude).
Suppose a consumption function is given as c = $500 0.75yd. the marginal propensity to consume is:______
In the the case above, if the consumption function is: C = $500 + 0.75 × YD, from the equation, the The marginal propensity to consume is option C) 0.75.
What is MPC?The marginal propensity to consume which is MPC is the aspect of each extra money that is dollar of a household's income that is said to be used, consumed or spent.
Note that Consumer behavior in regards to saving or spending has a very vital impact on the economy of a country.
From the formula given, the breakdown is:
YD = disposable income.
Autonomous consumption = $500.
The marginal propensity to consume = 0.75.
Therefore, In the the case above, if the consumption function is: C = $500 + 0.75 × YD, from the equation, the The marginal propensity to consume is option C) 0.75.
See full question below
Suppose that the consumption function is: C = $500 + 0.75 × YD
(Scenario: Consumption Spending) The marginal propensity to consume is:
A) $500.
B) 0.
C) 0.75
D) 0.2.
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