Agardener pushes her 90 kg wheelbarrow in a straight line out of her garage and across the yard in 18 s. if her average velocity is 1.5 m/s, what is her displacement? a. 0.8 km b. 12 km toward the garden c. 18 m toward the garage d. 27 m away from the garage

Which notation is used to represent an alpha particle? a. b. c. d.

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final

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.