What is the relationship between the magnetic and electric fields along the path of a moving electromagnetic wave?
A. The angle between them varies as the wave moves.
B. They vibrate at different times.
C. They form a right angle with each other.
D. They form a 180° angle with each other.

Determine the age of a fossil if it had only one eighth of its original carbon-14 content remaining?

Arefrigerator uses r-134a as the working fluid and operates on the ideal vapor-compression refrigeration cycle except for the compression process. the refrigerant enters the evaporator at 120 kpa with a quality of 34 percent and leaves the compressor at 70°c. if the compressor consumes 450 w of power, determine (a) the mass flow rate of the refrigerant, (b) the condenser pressure, and (c) the cop of the refrigerator. (0.00644 kg/s, 800 kpa, 2.03)

Four identical lab carts each have a mass of 200 kg. different masses are added to the carts and the velocities are measured. all carts move to the right.