K.e = ½mv² = ½×150×72 = 75×72 = 5400joules
When ice melts, its temperature doesn't change ... ice at 32 degrees becomes water at 32 degrees.
When water boils, its temperature doesn't change ... water at 212 degrees becomes steam at 212 degrees.
The row that says both of these is row-D .
A smaller bell size would have a higher pitch relative to a larger bell because the smaller surface area makes for smaller vibrations in the metal, which have a higher frequency.
Electric motors require electricity to move the motor parts and do work (like an electric fan).
Elecgric generators actually burn diesel fuel to spin a motor around and around and around to GENERATE, or MAKE, electricity that you can then use to power your fans and lights in your house.