Which of the following is not a type of system?

Mechanical Ecological Social Classical

The Faraday disk was an early example of what?

If a wave has a speed of 200 m/s and a wavelength of 20 meters, what is the frequency?

What is the current in a series circuit with a resistance of 30 ohms and a potential difference of 120 volts?

Spiral galaxy rotation curves are generally fairly flat out to large distances. Suppose that spiral galaxies did not contain dark matter.

Which statement describes the magnetic effect of a bar magnet?

Astronauts in orbit are not truly weightless.

Which of the following statements is true regarding the nature of light? Straight line motion is a particle property of light. Straight line motion is a wave property of light. Straight line motion is not a property of light.

A particle that is composed of two up quarks and one down quark is a (1) meson (3) proton (2) neutron (4) positron

Car headlights have both low beams and high beams. The high beams may be necessary when it is very dark outside. If the power for the high beam is 60.0 watts and the current is 5.0 amps, how much voltage is required?

Tsunami waves are almost the same as ripples caused by throwing a rock into a pond. what is the major difference between the two?