Consider two points in an electric field. The potential at point 1, V1, is 37 V. The potential at point 2, V2, is 164 V. An electron at rest at point 1 is accelerated by the electric field to point 2. Required:
a. Find the numerical value of the change of the electric potential energy in electron volts (eV).
b. Express v2, the speed of the electron at point 2, in terms of AU, and the mass of the electron me.
c. Find the numerical value of v2 in m/s

Ihave a density of 1.61g/cm^3 and a mass of 28g. find the missing value

1. what is the relationship between wavelength and the penetrating power of an electromagnetic wave? a) the penetrating power has no relationship to the wavelength. b) the penetrating power increases as the wavelength increases. c) the penetrating power decreases as the wavelength increases. d) the penetrating power decreases as the wavelength decreases. 2. as ice melts and turns into water, the speed of sound through the material would most likely do what? justify your answer. a) the speed would not change because the material is always water. b) the speed of sound would increase because the density of water is less than that of ice. c) the speed of sound would increase because energy is added to ice in order to make it melt. d) the speed of sound would decrease because sound travels faster through solids than liquids. 3.which of these waves need a medium to travel through? a) sound b) x-rays c) infrared rays d) visible light

It takes a lot of energy to get the temperature of water to increase and eventually boil because water has a high heat.