While skateboarding at 19 km/h, Alana throws a tennis ball at 11 km/h to her friend Oliver. If Alana is the reference frame, the speed of the tennis ball is km/h.

What is the temperature 32°F in degrees Calsius

Is Bakelite an example of a non-metal that can conduct electricity

When heat is added to an object, what is happening to the item at the atomic level? (Check all that apply) The atoms in the structure are vibrating more. The atoms begin breaking apart. The atoms begin to move more.

A particular wire has a resistivity of 6.47*10-8 Ωm and a cross-sectional area of 2.32 mm2. A length of this wire is to be used as a resistor that will develop 130 W of power when connected to a 9.00 V battery. What length of wire is required?

Calculate the earth's gravity force on a 75 kg astronaut who is repairing the hubble space telescope 600 km above the earth's surface express your answer using two significant figures.

A 6.0-kg ball is sliding to the right at 25.0m/s and strikes a second ball (15-kg) that is initially at rest head-on. After the collision, the 6-kg ball moves to the left at 12.5m/s. What is velocity of the second ball?

At a certain harbor, the tides cause the ocean surface to rise and fall a distance d (from highest level to lowest level) in simple harmonic motion, with a period of 12.4 h. how long does it take for the water to fall a distance 0.

What is the average speed of an object with a total distance traveled of 45 meters in 50 seconds

Some machines do not multiply the force that is applied to them

An automotive research facility is testing a new design on bumpers to determine the force at which it will break.