A string vibrates at a frequency of 20 Hz. what is its period?

The crankshaft in a race car goes from rest to 3000 rpm in 3.0 s. (a) What is the crankshaft's angular acceleration? (b) How many revolutions does it make while reaching 3000 rpm?

NaCI is__ an acid a base a salt

Gravitational potential energy is a form of potential energy

6. Your friend is going 30 mph, when she slams on the brakes. If you are not wearing a safety belt. Which way does your body move? How fast will you be going when you slam into the windshield? Explain why you move this way in terms your inertia.

An airplane has a mass of 2*10^6 kg and air flows past the power surface of the wings at 100ms¯¹. If the wings have a surface area of 1200m², how fast must the air flow over the upper surface of the wing if the plane is to stay in the air?

How do matter and energy interact?

What is something that has a lot of thermal energy?

Why do we use a shunt on the galvanometer

Two of the element sodium combine with one of the element chlorine to form the sodium chloride.

What is the wavelength of an earthquake wave if it has a speed of 4 km/s and a frequency of 7 Hz?