the initial kinetic energy of an object moving on a horizontal surface is K. Friction between the object and the surface causes the velocity of the object to decrease uniformly to zero in time t. What is the kinetic energy of the object at time = t/2?​

In a stagnant pool of water, a crayfish may spend much of its time lying with one side of its carapace near the surface of the water. in this position, it will move the walking legs on that side in a rhythmic back-and-forth motion. explain the likely function of this behavior.

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.

Will mark as brainliest how does a catapult increase the trajectory of an object? ps. answer as if u were a 5th grader