Two similar gold spheres are separated by a distance of
.34 m. The first sphere (A) has a charge of -4.0 x 10^-8C
and the second sphere (B) has a charge of -5.0 x 10^-13
C. If the electrostatic Force on B due to A is 2.5 N, what is
the magnitude of the electrostatic force on A due to B?

A.10.N

B.5.0 N

C.1.2 N

D.2.5 N

Which accounts for an increase in the temperature of a gas that is kept a constant volume

4r-134a enters the condenser of a residential heat pump at 800 kpa and 50°c at a rate of 0.022 kg/s and leaves at 750 kpa subcooled by 3°c. the refrigerant enters the compressor at 200 kpa superheated by 4°c determine (a) the isentropic efficiency of the compressor, (b) the rate of heat supplied to the heated room, and (c) the cop of the heat pump. also, determine (d) the cop and rate of heat supplied to the heated room if this heat pump operated on the ideal vapor-compression cycle between the pressure limits of 200 and 800 kpa. (0.757, 4.37 kw, 5.12, 6.18, 3.91 kw)

The record distance in the sport of throwing cowpats is 81.1 m. this record toss was set by steve urner of the united states in 1981. assuming the initial launch angle was 45° and neglecting air resistance, answer the following. (a) determine the initial speed of the projectile. m/s