What must happen to a wave’s frequency if the wave length increases but the wave speed remains the same? the frequency of the wave will not change the frequency of the wave will increase the frequency of the wave will decrease the frequency of the wave will double

1kg of water needs to recieve 4200j of energy to go from 90 degrees to 91 degrees. what is the specific heat capacity of water? what are the units?

Which is an example of an exothermic process?

An electron moving at 5.06 103 m/s in a 1.23 t magnetic field experiences a magnetic force of 1.40 10-16 n. what angle does the velocity of the electron make with the magnetic field? there are two answers between 0° and 180°. (enter your answers from smallest to largest.)