6-marker physics paper 1

“The arrow shows the direction of movement of the objects. The arrows are not drawn to scale

explain how momentum is conserved in the collision”

• momentum = mass X velocity

• momentum is conserved as the total momentum before id is equal to the momentum after

• When Q and R collide, time is the same for both

• Energy is transferred as R is not moving, as it has no velocity (stationary), and Q has velocity

• R gains momentum as Q loses it → every action has its equal and opposite reaction

• Q had momentum, then loses it to R and R gains it, but they both have momentum

“X-rays and radio waves are part of the electromagnetic spectrum and have different uses

Compare them, include uses and different ways electrons are involved”

• X-rays are used for medical screening and to examine the inside of metal objects. X-rays are formed when electrons gain energy and move un an energy level before de-exciting and falling back down an energy level and emitting X-rays.

• radio waves - communication and TVs and radios. produced when electrons vibrate in a circuit - they produce a wave with a frequency that is transmitted to the receiver

“Gamma radiation is