What happens when a star's core runs out of hydrogen and why does this occur?

In order to convert sunlight energy into usable energy the cell needs

An 8.0-kg object moving 4.0 m/s in the positive x direction has a one-dimensional collision with a 2.0-kg object moving 3.0 m/s in the opposite direction. The final velocity of the 8.0-kg object is 2.0 m/s in the positive x direction.

In what ways are plasmas similar to gases? What makes plasmas different than gases?

White light is spread out into its spectral components by a diffraction grating. if the grating has 2 010 grooves per centimeter, at what angle does red light of wavelength 640 nm appear in first order

Where have you heard the word calorie before what do you think a calorie is

Which statement about how light travels is true? A Light waves need a medium to travel, and they travel at the same speed even if the light source is moving.

Explain why the car reaches a top speed even though the thrust Force remains constant at 3500N

4. A helicopter is flying at a height of 1.5km. If it has 50MJ of G. P. E., what is the mass of the helicopter?

Unless otherwise posted, what is the speed limit in a school zone? florida

If you put in 10 J of work to push 1 c of charge against and electric field what will be its voltage with respect to its starting position? when released, what will be it's kinetic energy if it flies past it's starting position?