Jessica and Linda, level 200 mechanical engineering students conducted an experiment to estimate the acceleration due to gravity. In the experiment, Jessica drops a ball at a distance of 1.5 metres above the floor. Linda measures the time to fall and obtains an estimate of 0.5 s. a) What do they estimate the acceleration due to gravity to be? b) Let s be the ball’s position relative to the floor. Using the value of the acceleration due to gravity that they obtained, and assuming that the ball is released at t = 0, determine s(in metres) as a function of time.

Ammonia enters the expansion valve of a refrigeration system at a pressure of 10 bar and a temperature of 18oc and exits at 6.0 bar. the refrigerant undergoes a throttling process. determine the temperature, in oc, and the quality of the refrigerant at the exit of the expansion valve.

Which of the following is the phase that results when the moon is on the opposite side of the earth from the sun? a. quarter moon b. crescent moon c. new moon d. full moon

Urgent pls a. coal consumption levels off and remains flat. b. petroleum, natural gas, and renewables show an increase in consumption c. more nonrenewable resources continued to be consumed than renewable. d. there is little projected increase in nuclear energy use. e. carbon dioxide emissions are projected to decline as we approach 2040. global energy consumption is defined as the total energy used by an individual or organizations from around the world. use the graph above to analyze the projected energy consumption from now until 2040. which statements in the prompt apply? a) a, b, d b) b, c, d c) a, c, d d) a, b, c, d