Answer:
they mostly use them as predictions if items they are not sure about or to show ideas in a smaller form
Explanation:
The change in momentum, Δp, of the body is 23520 Kgm/s
<h3>Momentum </h3>
- The momentum of a body is defined as the product of its mass and velocity
Momentum, p = m×v
<h3>Change in momentum </h3>
Change in momentum is equal to the final momentum minus the intiala momentum
Change in momentum = mv - mu
Mass of car = weight/g
where g = 10 m/s^2
Mass of car = 15680/10
Mass of car = 1568 Kg
Change in momentum = 1568 Kg × 20 - 1568 Kg × 5
Change in momentum, Δp = 23520 Kgm/s
Therefore, the change in momentum, Δp, of the body is 23520 Kgm/s
Learn more about momentum at: brainly.com/question/7538238
Answer: The sum of protons and neutrons in the nucleus
Explanation: The Formula For Atomic Mass or Mass Number is
Atomic mass= Protons + Neutrons
Answer:
c)
Explanation:
A collision is said to be elastic when the total kinetic energy is the same after the collision. The speed of objects that are stuck together will always be less than the initial speed of the object that was in motion given that the other particle was at rest. It is because the kinetic energy of the system was due to the moving object. The objects have a greater overall mass when they are stuck. If the kinetic energy is the same and the mass increases, the velocity must decrease.