How does the skater's kinetic energy changes as he moves down the ramp?

Aluminum oxegyn dot diagram

When a 20 V battery is hooked up to a 100 Ω resistor in a circuit, how much current flows through the circuit?

Imagine that you replace the block in the video with a happy or sad ball identical to the one used as a pendulum, so that the sad ball strikes a sad ball and the happy ball strikes a happy ball.

Ann drove to the store 10 km north of her house and then drove to the library which is 5 km south of the store

The following list contains substances with H + ions, therefore they are all acids: HCl, H2SO4, NaOH. True False

Calculate the mass defect of the helium nucleus 42He. The mass of neutral 42He is given by MHe=4.002603u.

A person lifts a 4.5 kg cement block a vertical distance of 1.2 m and then carries the block horizontal - ly a distance of 7.3 m. determine the work done by the person and by the force of gravity in this process.

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.

A 5.1 kg black bear cub weighs 49.98 N. The cub is carried by its mother up into the safety of a white pine tree.

Which location is associated with persistent upwelling of cold water to the ocean surface?