A rock of mass 7 kg is being whirled in a horizontal circle on the end of a rope 2.5m long. if the tangential speed of the rock is 2.3m/s, what is the tension in the rope?

If you wanted the pitch of a horn to drop relative to an observer, which way would you move the horn, relative to where that observer is located? A. Leave it in the same place and play the horn more softly B. Away from the observer C.

How do you think momentum affects car crashes?

A coil with zero resistance has its ends labeled a and b. The potential at a is higher than at b. Which of the following could be consistent with this situation? Mark all that apply a. The current is constant and is directed from a to b. b.

How long would it take for a ball dropped from the top of a 484-foot building to hit the ground? round your answer to two decimal places?

A student is investigating thermal energy transfer. The student touches a piece of metal to a hot object, causing the metal to heat up.

Microwave, radio signal, light, earthquake which does not belong

A 9.0-v battery is connected to a bulb whose resistance is 2.5 ω. part a how many electrons leave the battery per minute?

What is the basic unit of matter? atom cell bacterium molecule Description

A person fires a 38 gram bullet straight up into the air. It rises, then falls straight back down, striking the ground with a speed of 345 m/s. The bullet embeds itself into the ground a distance of 8.9 cm before coming to a stop.

Subject: Science Why is it important to report experimental results honestly even when the results go against your hypothesis?