Answer:
A. The sum of all the forces acting on an object.
Answer:
-20N
Explanation:
The racquet ball will bounce back with the same force.
This is in compliance with newton's third law of motion:
"action and reaction are equal but opposite"
If the ball hits the wall with an action force of 20N, the reaction force will be -20N.
The negative indicates an oppositely directed force.
He’s gonna be charged with aggravated robbery with deadly assault an a weapon
Answer:
A satellite orbiting earth 1
Your shoulder 3
f=m x a 2
A soccer ball 2
A magician 3
When you paddle 3
A picture 1
Earth 1
A rocket 1
A speed skater 2
Explanation:
Law 1 states an object at rest , stay at rest and an object in motion stays in motion unless acted on by another force.
Law 2 states that the acceleration of an object depends on its mass and force applied.
Law 3 states every action creates an equal and opposite reaction.
The missing question is: how many photons are produced per second?
Answer:
Explanation:
The energy of a photon is given by
where
h is the Planck constant
c is the speed of light
is the wavelength of the photon
In this problem, the photons have wavelength
, so each photon has an energy of
The total energy emitted by the bulb in 1 second is
E = 100 J
Therefore, the number of photons emitted per second is
