Margaret, a researcher, desires to conduct a field experiment to determine the effects of a shopping mall's ambience on consumer purchase behavior. However, she has to deal with other influencing factors such as noise, crowd, and space distribution. She desires to avoid them by using randomization. In this context, noise, crowd, and space are variables. internal construct extraneous linear

Find the momentum for a 2.6-kg brick parachuting straight downward at a constant speed of 8.4 m/s .

Aball with a mass of 275 g is dropped from rest, hits the floor and rebounds upward. if the ball hits the floor with a speed of 2.40 m/s and rebounds with a speed of 1.70 m/s, determine the following. (a) magnitude of the change in the ball's momentum (let up be in the positive direction.)

Two kilograms of air within a piston–cylinder assembly executes a carnot power cycle with maximum and minimum temperatures of 800 k and 300 k, respectively. the heat transfer to the air during the isothermal expansion is 60 kj. at the end of the isothermal expansion the volume is 0.4 m3. assume the ideal gas model for the air. determine the thermal efficiency, the volume at the beginning of the isothermal expansion, in m3, and the work during the adiabatic expansion, in kj.