Which of the following is NOT a factor that affects the apparent brightness of a star as seen from Earth?

A. how old the star is

B. how big the star is

C. how hot the star is

D. how far away the star is

When measuring current, always place the meter in a. series with the circuit. c. the highest DC volts position. b. the highest AC volts position. d. parallel with the circuit.

An old lady uses a walker and is able to cross the street. is this inertia?

In a pendulum experiment the pendulum moves from one side to the other side in 0.6 second. Calculate the period of the pendulum.

Which of these models of the solar system first proved that the sun is at one of the foci of Earth's elliptical orbit?

A 5.0-kg rabbit and a 12-kg Irish setter have the same kinetic energy. If the setter is running at speed 4.9 m/s, how fast is the rabbit running?

As a fire truck approached Mary, the pitch of the siren got higher. once the fire truck passed and moved away, the sirens pitch got lower. this change in pitch is because in the sound waves

Find the magnitude of the sum of these two vectors

Light waves that cross from an air medium to a water medium will A. O be focused into a straight line. B. O lose energy and dissipate. C. O change length and direction. D. O reflect off the water's surface.

What is a possible cost of using nonrenewable energy resources? A. Costs more money B. Less water pollution C. Sustainable energy D. Greenhouse gases

Kara is writing a science-fiction story. In the story, Earth no longer experiences day and night. To return Earth to normal, which action should the heroine of the story take? A. She should get the Sun to travel around Earth again. B.