Hydrogen atoms are placed in an external magnetic field. the protons can make transitions between states in which the nuclear spin component is parallel and antiparallel to the field by absorbing or emitting a photon. what magnetic-field magnitude is required for this transition to be induced by photons with frequency 23.1 mhz?

1-10. need . physics. circular motion. 35 points

Awater-filled u-tube manometer is used to measure the pressure inside a tank that contains air. the water level in the u-tube on the side that connects to the tank is 5 ft above the base of the tank. the water level in the other side of the u-tube (which is open to the atmosphere) is 2 ft above the base. determine the pressure within the tank.

Matter is needed to transfer thermal energy bya. conductionb. convectionc. radiation d. both a & b.