Photons (Electromagnetic radiation) are released when electrons drop from a higher energy lever to a lower energy level. Therefore the opposite insinuated by the last statement is wrong.

4 0

3 years ago

Is the change in velocity divided by the time needed for the change to occur.

Montano1993 [528]

Answer: yes

Explanation:

6 0

3 years ago

A ball is dropped from rest from a high window of a tall building and falls for 4 seconds. Neglecting air resistance, the final

Semenov [28]

Answer:

The final velocity of the ball is 39.2 m/s.

Explanation:

Given that,

A ball is dropped from rest from a high window of a tall building.

Time = 4 sec

We need to calculate the final velocity of the ball

Using equation if motion

$v=u+gt$

Where, v = final velocity

u = initial velocity

g = acceleration due to gravity

t = time

Put the value into the formula

$v=0+9.8\times4$

$v=39.2\ m/s$

Hence, The final velocity of the ball is 39.2 m/s.

6 0

4 years ago