Determine an expression for the position vector of a particle that starts on the positive y axis at t=0 (i. e., at t=0, (x0,y0)=(0,r)) and subsequently moves with constant ω. express your answer in terms of r, ω, t, and unit vectors i^ and j^.

How can you increase the strength of an electromagnet?

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.

With which of the following is the weak nuclear force associated? a.lightingb.nuclear decayc.ocean tidesd.stactic cling