What is a light year? The time it takes for light to reach Earth from the sun, the distance light travels in one year, the time it takes for light to travel around the sun or the distance light can travel in a year before it burns out.

You serve a volleyball with a mass of 2.1 kg. The ball leaves your hand with a speed of 30 m/s The ball has energy Calucate it

A teacher wants to demonstrate that unheated water can boil at room temperature in a beaker within a bell jar connected to a vac-uum pump. However, the vacuum pump is faulty and can reduce pressures only to 15 kPa.

Approximately how many earthquakes are strong enough to be felt each year worldwide? a. 500 b. 1000 c. 10,000 d. 30,000 2. what isthe location on the surface directly above the earthquake focus called? a. epicenter b. fault c. magnitude d. moho

Why scientifically died it hurt when you stub your toe in the corner of a wall?

What is the main function of the lymphatic system? A. Maintaining fluid balance B. Fighting infection C. Cleaning the blood D. Making lymph

A tree is standing in the middle of a meadow. As you watch, the wind begins to blow and the tree bends. Which statement best explains how you could tell that a net force was acting on the tree? OA) The tree had momentum.

Consider two cars, a 700kg Porsche and a 600kg Honda Civic. The Porsche is speeding along at 40 m/s (mph) and the Civic is going half the speed at 20 m/s.

Which statement about an electron in the 4d state is correct? A. The magnitude of its orbital angular momentum is 6√ℏ. B. The largest orbital angular momentum it could have in any given direction is 4ℏ. C.

A D note has a frequency of 587.33 Hz. Calculate its wavelength in meters. The speed of sound is 343 m/s

A cyclist allows his bike to roll down a hill without pedaling. Towards the bottom of the hill he applies his brakes. The bike comes to a stop. Applying the brakes causes the brakes to warm up. Describe the energy transfers that have occurred.