Two motorcycles are traveling due east with different velocities. however, four seconds later, they have the same velocity. during this four-second interval, cycle a has an average acceleration of 1.2 m/s2 due east, while cycle b has an average acceleration of 3.9 m/s2 due east. by how much did the speeds differ at the beginning of the four-second interval?

Sound is a disturbance that travels through a medium as a

Find the dimensions and area of the largest rectangle that can be inscribed in the upper half of the ellipse. (give your answers in terms of a and b. enter the dimensions as a comma-separated list.)

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.