Which mechanical waves needs a medium to travel through?

Transverse and longitudinal waves only

Longitudinal and surface waves only

At mechanical waves need a medium to travel through

Surface waves only

Haley was jumping on the trampoline at her house. As her socks rubbed against the trampoline, they became charged. If a small piece of lint with a charge of + 4.55 E - 21 C is attracted to the socks by a force of 1.

For long-distance transmission of power, in order to reduce losses in the wires by driving a low current at high voltage, we should a) use a step-up transformer b) change the length of the wires between transmission towers c) not use a transformer

What is most similar about alkaline earth metals

A car not engine has an efficiency of 22.0%. it operates between constant temperature reservoirs with a difference of 75d degrees Celsius. what are the temperature of the two reservoirs

What is the motion of energy

What is the energy that moves your arms and legs

A moving object can be in equilibrium. Explain.

If gravity puts a force of 3N an object, how much force would it put on an second object that was twice as heavy

Where did the asteroids in the asteroid belt come from?

Your university radio stawon has a 5.0-kw radio transmixer that broadcasts uniformly in all direcwons; listeners within 15 km have reliable recepwon. you want to increase the power to double that range. what should be the new power?