Calculate the output voltage Vo for the op amp circuit , where l = 1 mA and R = 7 kΩ. (Assume ideal op amp) The output voltage vo for the given op amp circuit is V.

Does work output exceed work input when a machine is used? a) yes, it does, as machines create energy. b) it depends on the type of machine used. c) no, it doesn’t, as machines are inefficient. d) no, it doesn’t, as machines cannot create energy.

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