A science teacher ran a marathon. She showed her students the silver blanket she was given after the race to keep her warm. A group of students investigated how the colour of the blanket affected how much infrared radiation was absorbed.

Give one reason why the infrared lamp was placed the same distance from both cans.

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz.

If the work required to stretch a spring 3 ft beyond its natural length is 15 ft-lb, how much work is needed to stretch it 27 in. beyond its natural length?

Ben (55kg) is standing on very slippery ice when junior (25kg) bumps into him. junior was moving at a speed of 8 m/s before the collision and ben and junior embrace after the collision. find the speed of ben and junior as they move across the ice after the collision. give the answer in m/s. describe the work you did to get the answer.