Afood department is kept at 2128c by a refrigerator in an environment at 308c. the total heat gain to the food department is estimated to be 3300 kj/h and the heat rejection in the condenser is 4800 kj/h. determine the power input to the compressor, in kw and the cop of the refrigerator.
the chemical reaction of cavendish involving zinc would be a reaction between hydrochloric acid and zinc yielding zinc chloride and hydrogen gas.
potential energy = mass * gravitational constant * height
what we don't know: potential energy
what we know:
gravitational constant (9.8 m/s)
ep = mgh
ep = 4 * 9.8 * 2
ep = 78.4 joules
the potential energy of the rock is 78.4 joules, based on the given information! hope this you!
we know that displacement is the length of straight line joining the initial position with the final position. as lisa walks around the block once, she comes back to her initial position here she started from, hence the initial and position of lisa is same. so her displacement is zero.
we know that distance is the length of the actual path followed by object between initial and final position. as lisa walks around the block once, she travels 1 mile. hence the distance traveled by lisa is 1 mile.
displacement : 0
distance : 1 mile
in spring mass system we know that angular frequency is given as
f = 8.38 hz
now we know that speed of shm at its extreme position is given by
here we know that
a = 17.5 cm
so maximum speed is 9.21 m/s