An arrow is launched at an angle of 30 degrees with an initial speed of 20.0 m/s. after 3 seconds, what will the arrow's speed be?

A 20 kg child is on a swing that hangs from 3.0-m-long chains. what is her maximum speed if she swings out to a 49 ∘ angle?

Which of these factors will increase the speed of a sound wave in air? A) wavelength B) temperature C) amplitude D) frequency E) period

Hot drinks are often served in plastic (styrofoam) cups. Why are these easier to hold than a paper cup?

If a cannon is fired use a=F/m to explain what happens to the cannon and the cannonball.

True or False? All waves transmit energy but not matter from one location to another

A stone is tied to s string and whirled around in a circle at constant speed. Is the string more likely to break when the circle is horizontal or when it is vertical? Account for your answer, assuming the constant speed is the same.

Two blocks, stacked one on top of the other, slide on a frictionless horizontal surface. The surface between the two blocks is rough, however, with a coefficient of static friction equal to 0.50. The top block has a mass of 2.

Process by which water vapor changes to a liquid Evaporation Condensation Convection radiation

Part A Find the energy U0 stored in the capacitor. Express your answer in terms of A, d, V, and ϵ0. Remember to enter ϵ0 as epsilon_0.

How many discovered planets are there