You are riding your bike to the mall. you travel the first mile in ten minutes. the last mile takes you 15 minutes. this is an example of: a. average velocity, b. positive acceleration, c. instantaneous speed, or d. negative acceleration

Aray of light traveling parallel to the principal axis of a concave mirror will be reflected through the mirror's

5g of ammonium nitrate was dissolved in 60g of water in an insulated container. the temperature at the start of the reaction was 23.0°c and at the end it was 19.0°c. calculate the energy absorbed by the reaction.

An ideal otto cycle has a compression ratio of 10.5, takes in air at 90 kpa and 40°c, and is repeated 2500 times per minute. using constant specific heats at room temperature, determine the thermal efficiency of this cycle and the rate of heat input if the cycle is to produce 90 kw of power.