A cat can hear sound frequencies up to 70,000 hz. bats send and receive ultra-high-frequency squeaks up to 120,000 hz. which hears sound of shorter wavelengths: cats or bats?

An object is traveling at a constant speed of 12.0 m/s when it slows to a stop. If it takes 10.0 m for the object to stop, what is the magnitude of its acceleration?

If a dog has a potential energy of 1500 J and a mass of 24 kg, how high off the ground is he?

The temperature at 5 p. m. is 20 degree. the temperature at 10 p. m. - 5 degree. how many degrees did the temperature fall

The 20 or so minerals that make up most of the rocks of earth's crust are known as?

If a spring has a spring constant of 1.00 * 10^3 N/m, what is the restoring force when the mass has been displaced 20.0 cm?

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