Specific heat refers to the mount of heat required to change 1 gram of a substance

The specific heat capacity is the amount of energy needed to raise the temperature of a unit mass of a material by 1 degree Celsius. For 1 gram of a substance, the specific heat capacity is the amount of heat that has to be applied to the substance to see a temperature increase of 1 degree Celsius. Notice that, the specific heat capacity for 1 gram can also be defined as the amount of heat 1 gram of that substance has to loose in order for it's temperature to drop by 1 degree Celsius.

what is the speed of a softball that travels 20m in 2secs

speed = 20/2 = 10 m/s

c) up is the direction the magnetic force is acting on the charge.