Acommon unit used to measure the energy of small particles is the electron volt (ev ev ), which is equal to the magnitude of the charge on the electron (measured in coulombs c c ) multiplied by 1 volt (v v ). in chapter 17, you will learn that coulombs multiplied by volts is equivalent to mass multiplied by length squared and divided by time squared. 1)which of the following quantities could be written in ev ev and why explain your answer? case a: gravitational potential energy mgh m g h , where m m is the mass of the object, g g is the acceleration due to gravity (length divided by time squared), and h h is the height of the object measured with respect to a reference position. case b: electric potential energy qδv q δ v , where q q is the charge of the particle in coulombs and δv δ v is the potential difference in volts through which the particle is being accelerated. case c: rest energy mc2 m c 2 , where m m is the mass of the object, and c c is the speed of light (length divided by time).

the part of the wave he is travelling on is the crest

radiation

explanation:

heat is transmitted by radiation

air exerts forces on falling objects near earth’s surface.

explanation:

the term 'free falls' refer to object that are falling towards the earth, in a situation in which gravity is the only force acting on the object.

for an object in free fall, the acceleration is constant (g, the gravitational acceleration), and so the velocity of the object constantly increases.

for objects near earth's surface, there is always another force acting on the object: the resistance due to the air. this force is opposed to the direction of fall of the object, and it is proportional to the velocity of the object, so as the object falls down, this force increases up to a point when it balances the force of gravity, and the object continues its motion at constant velocity (called terminal velocity). since in this case gravity is not the only force acting on the object, we are not in a situation of free fall.

there are no components of a physical goal mentioned on the list of choices that you've provided.