Why is earths outer core hotter than earths oceanic crust

What effect does nuclear radiation have on atoms?

A100-watt light bulb radiates energy at a rate of 100 j/s. (the watt, a unit of power or energy over time, is defined as 1 j/s.) if all of the light emitted has a wavelength of 525 nm , how many photons are emitted per second?

The rules of engagement (roe) working group is often used to (select all that apply.)