How do stars radius compare with their mass

When is a body said to be at rest

A particle moving along the x-axis has its velocity described by the function vx = 2t2m/s, where tis in s. Its initial position is x0 = 2.3m at t0 = 0 s A) At 2.2s, what is the particle's position? Express your answer with the appropriate units.

Two balls collide head-on on a table. The first ball has a mass of 0.50 kg and an initial velocity of 12.0 m/s. The second ball has a mass of 0.75 kg and an initial velocity of - 16.0 m/s.

Car a is traveling at a constant speed 90 m/s east. a second car b is initially at rest when car a passes it at t=0.

A suction cup works by creating a vacuum between the rubber cup and surface its stuck to. if the total area of the rubber cups is 0.

What does Newton's second law of motion say

Two sinusoidal waves are moving through a medium in the positive x-direction, both having amplitudes of 7.00 cm, a wave number of k=3.00m-1, an angular frequency of ω=2.50s-1, and a period of 6.00 s, but one has a phase shift of an angle ϕ=π12rad.

Which season does the Southern Hemisphere experience when it is tilted toward the sun? A. winter B. summer C. spring D. autumn

For an ideal fluid flowing through a horizontal pipe, Bernoulli's principle and the continuity equation state that the pressure within the pipe does which of the following? (Assume measurements are taken along the pipe in the direction of fluid flow.

A bowling ball has a mass of 40kg and is kicked with a force of 10 N. What is it's acceleration