What does the speed of a wave on a string depend upon

In an effort to loosen the bolt on the wheel of a car, a man with a mass of 70 kg steps on the end of a 50-cm tire iron which is extending horizontally from the bolt. how much torque is he applying to the bolt?

Cheryl has a mug she says is made up of matter. Heather says that the hot choclate inside the cup is made up of matter too. Keaton says that the steam coming from the cup is also made up of matter.

An airplane flies eastward and always accelerates at a constant rate. At one position along its path, it has a velocity of 28.9 m/s. It then flies a further distance of 45300 m, and afterwards, its velocity is 47.5 m/s.

Three students are pushing on a box. Under what conditions will the motion of the box change?

What is the current in a 75 W light bulb that is plugged into 120 V household outlet?

Radar, the first link in the cosmic distance chain, is used to establish the baseline distance necessary for the second link, parallax. What baseline distance must we know before we can measure parallax?

What types of areas are more prone to floods?

would the phases of the moon be affected if the moon didn't make one rotation for each revolution of earth?

What kinetic energy has 1 tone car traveling at 15 m/s

Ceres is a dwarf planet located in the main asteroid belt.