Order the sounds made by these sources from highest to lowest pitch.

telephone, piano, motorcycle, lawn mower

lawn mower, motorcycle, piano, telephone

motorcycle, telephone, piano, lawn mower

lawn mower, piano, telephone, motorcycle

A hot air balloon contains 85,000 moles of air. To what temperature must the air be heated to fill a volume of 2500 m at a pressure of 100 kPa? A. 260K B. 2900 K C. 350 K D. 0.35 K

Unbalanced contact forces between several object would result in?

What's the net force of an object being throwing into the air

What do scientists use a scientific law for?

1 mi=5280 ft and 1 mi=3.281 ft how many meter are in a mile? A. 17,324 m B. 17,320m C. 1760m D. 1609m

Two abiotic factor that effect an ecosystem are;

Which of the following is explained by general relativity? A. How massive stellar objects can form a lens. B. Why moving muons decay more slowly than stationary ones C. Why atomic clocks tick more slowly when in motion D.

Imagine that you're observing a collision. Which action would allow you to determine whether the collision is inelastic? A. Measure the force of impact. B. Observe whether the colliding objects change their shape. C.

When compared to other types of waves, electromagnetic waves differ because they are Select one: A. a form of energy. B. able to travel through a vacuum. C. all visible. D. able to move particles in a medium.

The velocity selector in in a mass spectrometer consists of a uniform magnetic field oriented at 90 degrees to a uniform electric field so that a charge particle entering the region perpendicular to both fields will experience an electric force and