A 2.0 kg cart moving in a straight line hits a piece of modeling clay (1.0 kg) that is at rest. The clay sticks to the cart and both move to the left at 1.0 m/s. What was the initial velocity of the cart and in which direction? (Remember to include - to indicate direction if necessary.) v= m/s

Using the work energy theorem. what is the velocity of a 850kg car after starting at rest when 13,000j of work is done to it.

Global warming will produce rising sea levels partly due to melting ice caps but also due to the expansion of water as average ocean temperatures rise. to get some idea of the size of this effect, calculate the change in length of a column of water 1.00 km high for a temperature increase of 1.00ºc. note that this calculation is only approximate because ocean warming is not uniform with depth. (answer in ×10^{-3} −3 m)

Ascientific blank must be testable and capable of being proven false?