Brahe's concept of the planetary system was most like that of

Ptolemy

Copernicus

Galileo

Aristarchus

Which of the following statements is true? A. Like charges attract and unlike charges repel each other. B. Gravitational forces only exist between large masses. C. On a level surface, normal force is greater than the weight of the object. D.

What is the difference between distance and displacement?

Suppose an automobile has a kinetic energy of 2300 J. When it moves with six times the speed, what will be its kinetic energy? Answer in units of J.

In hydroelectric dams, gravitational potential energy is used to produce electrical energy. What is the mass of water that must fall over a dam that is 12 m high in order to produce the same amount of energy in an AA battery (10,800 J) ?

A magnifying glass is an example of which type of microscope?

Which statement describes how light behaves when it strikes a translucent material? A. Light is scattered. B. Light is transmitted. C. Light is reflected. D. Light is absorbed.

A certain gas is present in a 15.0 l cylinder at 2.0 atm pressure. if the pressure is increased to 4.0 atm the volume of the gas decreases to 7.5 l.

Choose all the answers that apply. To qualify as a planet, a celestial object must: have an irregular shape revolve around the sun orbit in a clear area have enough gravity to have a spherical shape have a satellite

Oxygen makes up the largest part of living cells at 65%. What is the percentage of the second-most abundant element in living cells?

Acceleration is defined as the rate of change for which of the following? A. time B. velocity C. position D. displacement