Describe how ultrasound and infrasound differ from normal sound, and give an example of each

Which would likely demagnetize a magnetized iron nail?

A 72 kg sled Is pulled forward from rest by a snowmobile and accelerates at 2 m/s squared forward for five seconds. The force of friction acting on the sled is 120 N backwards. The total mass of the snowmobile and driver is 450 kg.

What two element is present in biotite mica that is not present in muscovite mica?

Why are not other objects, like your pencil, being pulled toward you

If you slide down a rope, it's possible to create enough thermal energy to burn your hands or your legs where they grip the rope. Suppose a 30 kg child slides down a rope at a playground, descending 1.5 m at a constant speed.

There are four people in the car, the driver slams on the gas pedal and all the passengers heads hit the headrest behind them when the car accelerates forward.

A car travels 15 miles in 30 minutes. Calculate its average speed.

What two factors affect the strength of a gravitational attraction? How does each effect the strength

A spring is stretched 2 cm when a mass of 40 grams is hung from it what is the spring constant of the spring

Can a red nova hurt earth?