Answer:
4) C.mass
5) C. Potential Energy
Explanation:
4) Kinetic energy (KE) of an object is the energy that it possesses due to its motion. If a mass is in motion ,it has a kinetic energy .
By definition

what matters in Kinetic energy is the mass and the velocity only .
there fore the answer is
C.mass
5) Potential energy is the energy stored in an object, due to the object's position or arrangement.
By definition

in potential energy the height matters.higher the height , higher the energy
therefore the answer is
C.Potential Energy
Answer:
6 m/s
Explanation:
if the bus and you are moving in the same direction, then you add your speeds together
Solar roller is a cool name
The frequency of note C3 is 131
.
<u>Explanation:</u>
Frequency is the measure of repetition of same thing a certain number of times. So frequency is inversely proportional to the wavelength. As wavelength is distance between two successive crests or troughs in a sound wave.
And frequency is the completion of number of cycles in a given time in sound waves. The frequency and wavelength are inversely proportional to each other with velocity of sound being the proportionality constant.
Thus, here the speed of sound is given as 343 m/s, the wavelength of the note is also given as 2.62 m, then frequency will be as follows:

Thus,

So the frequency of note C3 is 131
.