With the device starting from a still position (0 m/s), you drop it, allowing gravity to accelerate it towards the ground at 9.8 m/s2. assuming it takes 1.5 seconds for the device to hit the ground, what is it’s velocity? [v = a*t]

Identify the amplitude on the diagram and give the correct description. question 3 options: a because amplitude is the distance from wave crest to wave crest. b because the wavelength shows amplitude. c because amplitude is the distance between a crest (or trough) and rest. d because wavelength show amplitude. (brainiest if you get it right! ) ~kayla

1.what is where an object is located 2. what is how fast an objects speed is changing 3. what is how fast an object is moving

Air is to be preheated by hot exhaust gases in a cross-flow heat exchanger before it enters the furnace. air enters the heat exchanger at 95 kpa and 20°c at a rate of 0.6 m^3/s. the combustion gases (cp = 1.10 kj/kg°c) enter at 160°c at a rate of 0.95 kg/s and leave at 95°c. determine the rate of heat transfer to the air and its outlet temperature.