What is the frequency of x-rays of 10 nm wavelength? 6 x 1016 hz 3 x 1016 hz 3.00 hz 6 x 108 hz

You throw a small rock straight up from the edge of a highway bridge that crosses a river. the rock passes you on its way down, 7.00 s after it was thrown. what is the speed of the rock just before it reaches the water 28.0 m below the point where the rock left your hand? ignore air resistance.

How many neutrons does element x if it’s atomic number is 28 and its mass number is 87

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