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?

Find the potential energy of a 2kg ball 15m in the air

A satellite of mass ms travels in a circular orbit of radius a around a planet of mass mp? ms. Part A Derive expressions for the orbital speed of a satellite.

A (n) ___ keeps a reaction from occurring by increasing the activation energy required for a reaction to occur. A. inhibitor B. catalyst C. stopper D. synthesis

Which requires more work, lifting a 10-kg load a vertical distance of 2 m or lifting a 5-kg load a vertical distance of 4 m?

A ray of light is incident on a plane mirror at an angle of 40 degrees with the mirror surface. What will be the angle of reflection? a) 40 degrees b) 50 degrees c) 90 degrees d) 150 degrees

One disadvantage of this type of power is that it still pollutes the air. biomass geothermal power hydropower solar power You want to create a new warming appliance that is safe.

A small rock remains at rest in outer space while an astronaut pushes horizontally on it with a force of 20 N. Which of the following must be true? A. There is another horizontal force acting on the rock. B.

If an igneous rock has very large crystals of minerals that you can see when looking at it, which type of igneous rock is it

You have a 60-foot roll of fencing and a large field. You want to make two paddocks by continuing the fencing down the middle of a rectangular enclosure. What are the dimensions of the largest such enclosure you can make?

Crystallization is a separation technique used to produce rock candy from a sugar solution. true or false