Can light pass through a vacuum?

How to find speed of a wave

If you hold a horizontal metal bar several centimeters above the ground and move it through grass, each leaf of grass bends out of the way.?

What is the main way in which heat transfer occurs in liquids and gases?

What wind turbines to hydroelectric dams and ethanol plants have in common?

Consider two rocks with masses of 1 and 10 kilograms. what is the relation between their inertias? between their masses? between their weighs on earth

If a ball is thrown vertically into the air in the presences of air resistance, would you expect the time during which it rises to be longer or shorter than the time during if falls?

The process of deformation due to plate movements that changes earth's surface is called

If the frequency of a sound wave is 250 hertz and its wavelength is 1.36 meters, what is the wave's velocity?

What will happen if I put my hand in a space vacuum.

You are exploring a distant planet. When your spaceship is in a circular orbit at a distance of 630 km above the planet's surface, the ship's orbital speed is 4900 m/s. By observing the planet, you determine its radius to be 4.48*106m.