Ablock is sent up a frictionless ramp along which an x axis extends upward. the figure below gives the kinetic energy of the block as a function of position x; the scale of the figure's vertical axis is set by ks = 46.0 j. if the block's initial speed is 4.50 m/s, what is the normal force on the block?

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?

Why is the use of carbon-14 limited

By what primary heat transfer mechanism does the sun warm the earth?