Astudent pushes a box with a total mass of 50kg. what is the net force on the box if it accelerates 1.5 m/s^2?

Arod of some material 0.20 m long elongates 0.20 mm on heating from 21 to 120°c. determine the value of the linear coefficient of thermal expansion [in (degrees c)^-1] for this material.

Explain why you think this diagram shows what happened to the carbon in the biodome.

The built in flash in a compact camera is usally capable of giving correct exsposure for distance up to how many meters?