True or false, the efficiency is the number of times a machine multiplies the input force ...

A ship sends a 1200 Hz sound wave down in the water, and detect the echo 3 seconds later what would happen if that ship sent out a 600 Hz sound wave instead?

What can cause a spark when a motor's plug is pulled from an outlet

What's the equation for acceleration

A velocity vs time graph what is the acceleration of the object

The atomic number of an element is determined by the number of A. electrons. B. protons. C. protons and neutrons. D. neutrons.

A beam of light from a monochromatic laser shines into a piece of glass. The glass has thickness L and index of refraction n=1.5.

How does the density of the Earth's core compare to the other layers of the Earth? A) The core is the densest layer. B) The core is the least dense layer. C) The core is only less dense than the crust. D) The core is only less dense than the mantle.

Who wins a tug-of-war one who pushes harder at the ground or pulls harder at the rope

Describe an experiment to show that liquids expand and contract at different rates

Which of the following is equivalent to 10 kilograms? a) 1000 grams b) 100 hectogram c) 1 hectogram d) 1000 centigrams