Which of these assumptions is Ptolemy's model of planetary motion based on?

The sun moves around the earth.

The earth moves around the sun.

The stars do not move.

The earth is flat.

Which one of the following choices is an effective way to pervent low-back pain A. eliminate warm-up before exercise B. lift objects by putting weight on your upper back C. maintain correct posture Do. limit the amount of exercise you do per week

Collisions in two dimensions is a difficult section to read and understand. But, when we look at momentum similarly to our 'Sum of our Forces', then we can use the same concept to solve these problems.

If you choose a career, you will always be satisfied with your work. True False

The tangent ratio is the ratio of the side opposite the acute angle over the side adjacent to the acute angle. True False

If the period of the oscillator were doubled, what would happen to the wavelength and wave speed?

A refrigerator is a system. The energy input into the refrigerator system (in the form of electricity) is the same as the amount of energy output from the system. Which of the following best describes the energy output of the system?

A 1,120 kg car is travelling with a speed of 40 m/s. Find its energy.

3. Calculate the amount of current through a 45-watt light bulb that is connected to a 120-volt circuit in your home.

Are oranges called oranges because oranges are orange, or is orange called orange because oranges are orange?

An object at rest has no net force acting on it. a. True b. False