a proton is traveling at 2*10⁴m/s and enters a magnetic field ofw0.2T. if the velocity of the proton is 4*10⁴m/s perpendicular to the field. what is the radius of path that the proton will move in?(Mass of proton =1.67*10¯²⁷kg)​

6–55 refrigerant-134a enters the condenser of a residential heat pump at 800 kpa and 358c at a rate of 0.018 kg/s and leaves at 800 kpa as a saturated liquid. if the compressor consumes 1.2 kw of power, determine (a) the cop of the heat pump and (b) the rate of heat absorption from the outside air.

1.what is where an object is located 2. what is how fast an objects speed is changing 3. what is how fast an object is moving

In science and physics what is the standard unit of measure for speed?