Um balão tem sua trajetória representada pela equação S = 4 x t²-24 x T + 36 A)em que instante o balão passa pela origem(S=0)da trajetoria

B)determine a velocidade no instante T=3s

me ajudem pls

To a of 4 x hz is 1. 0. mm nm nm

Acommercial refrigerator with refrigerant-134a as the working fluid is used to keep the refrigerated space at -35°c by rejecting waste heat to cooling water that enters the condenser at 18°c at a rate of 0.25 kg/s and leaves at 26°c. the refrigerant enters the condenser at 1.2 mpa and 50°c. if the compressor consumes 3.3 kw of power, determine (a) the mass flow rate of the refrigerant, (b) the refrigeration load, (c) the cop, and (d) the minimum power input to the compressor for the same refrigeration load.

Your friend increases her force on the desk by 30n . she doesn't change the direction of her push . what happens to the net force on the desk .will the desk accelerate