What is a vector?

a. a scalar quantity
b. a quantity that has magnitude and direction
c. a magnitude that can be measure
d. a direction

What is tan(61)? а. 1.80 b. 0.49 c. 0.61 d. 0.87

How does the amount of energy required to hold each proton and neutron in the nucleus compare to the energy released when they are removed?

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.