Asample of 0.800 kg of water is held at a temp of 100°c. how much energy must be added to completely turn the liquid water to water vapor? ( the latent heat of vaporization for water is 2260 kj/kg; the latent heat of fusion for water is 333 kj/kg.) a. 1810 kjb. 266 kjc. 256 kjd. 2830 kj

What object a collides with object b and bounces back its final momentum is?

As you are trying to move a heavy box of mass m, you realize that it is too heavy for you to lift by yourself. there is no one around to , so you attach an ideal pulley to the box and a massless rope to the ceiling, which you wrap around the pulley. you pull up on the rope to lift the box. use g for the magnitude of the acceleration due to gravity and neglect friction forces. once you have pulled hard enough to start the box moving upward, what is the magnitude f of the upward force you must apply to the rope to start raising the box with constant velocity? express the magnitude of the force in terms of m, the mass of the box.

The sun’s mass is 2.0×10^ 30 kg, its radius is 7.0×10 5 km, and it has a rotational period of approximately 28 days. if the sun should collapse into a white dwarf of radius 3.5×10 3 km, what would its period be if no mass were ejected and a sphere of uniform density can model the sun both before and after?