a boy stands 80m in front of a tall cliff and produces sound by clapping two planks together. A girl standing next to him time the return of the echo at 0.5. how fast does sound wave travel in this place

Four ways to increase magnitude of current in dynamo

Which of the following signs on q and w represent a system that is doing work on the surroundings, as well as losing heat to the surroundings?

what is the relationship between the direction of the electric field lines and the change in electric equipotential?

What is the pH range of an acid? 0 - 6 6 - 8 8 - 14 0 - 14

When Javier touches a hot mug of tea, energy is transferred from the surface of the mug to his hand. which kind of energy is this?

Which planet is 92,897,000 miles from the sun?

Stretching or drawing a solid into a wire is which of the following physical properties A) ductility B) solubility C) malleability D) conductivity

How well does the infographic ""Plastics in the Ocean"" present a solution to the problem it describes?

How does erosion move and deposit rocks

Match the word with its definition. Column A1. rotational speed 2. tangential speed 3. centripetal force 4. centripetal acceleration 5. Newton's Second Law 6. Newton's First Law Column Ba. 1 revolutions per minute (RPM) b.