The stopwatch will be the most useful in determining the kinetic energy of a 50 g battery- powered car traveling a distance of 10 m.
<h3>What is kinetic energy?</h3>
Kinetic energy is the energy of a body possessed due to motion.
This means that for an object to possess kinetic energy, it must be in motion.
The kinetic energy is measured in Joules, which is a product of the mass of the substance and the time taken to travel a distance.
A stopwatch is an instrument used to measure time as one of the components of kinetic energy.
Therefore, the stopwatch will be the most useful in determining the kinetic energy of a 50 g battery- powered car traveling a distance of 10 m.
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Answer:
B
Explanation:
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Answer: :)
1.) The Doppler effect is, the change in sound or light that occurs whenever there is motion between the source and its observer. The siren of the fire engine has a lower pitch as it moves away because the waves are now spread out causing a lower frequency and a lower pitch.
2.) Wave frequency is related to wave energy. Since all that waves really are is traveling energy, the more energy in a wave, the higher its frequency. The lower the frequency is, the less energy in the wave.
Answer:

Explanation:
The distance of Earth from the Sun is
and of Mars from the Sun is
. Let assume that both planets have circular orbits. The centripetal accelaration can be found by using the following expression:

Since planet has translation at constant speed, this formula is applied to compute corresponding speeds:

Earth:


Mars:


Now, centripetal accelarations can be found:
Earth:


Mars:


The ratio of Earth's centripetal acceleration to Mars's centripetal acceleration is:


Answer:
Electric current is directly proportional to potential energy and inversely proportional to resistance.
Explanation: