A light-year is:

the distance traveled by light in one year

the distance from earth to the sun

equal to 93,000,000 miles

the time required for light to travel in one year

An orange is placed on a table in a completely dark room, without any source of light. Which of the following choices correctly describes what an observer will see as he looks in the direction of the orange?

A motor is used to produce 4.0 waves each second in a string. What is the frequency of the waves? F 0.25 Hz G 15 Hz H 25 Hz J 4.0 Hz

Which is an example of an environmental health concern? Monitoring pathogens in a public water supply Interpreting data about people's exercise habits Creating an intervention to reduce alcohol abuse Finding the cause of an national influenza

If a train going 60 m/s hits the brakes, and it takes the train 1 minute 25 seconds to stop, what is the train's acceleration?

Technician A says that the starter motor used to crank diesel engines can draw up to 400 amps of current.

What does deltaX mean in physics?

Which activity involves using fossil fuels directly or indirectly? 1) eating fresh fruit for a snack 2) cooking hot dogs on a campfire 3) using crayons to color 4) walking to school

Which of the following objects would have the most inertia? A. A sphere with a radius of 5 cm and a mass of 34 grams. B. A sphere with a radius of 4 cm and a mass of 15 grams. C. A sphere with a radius of 8 cm and a mass of 27 grams. D.

A boy slides a book across the floor using a force of five and over a distance of 2M what is the kinetic energy of the book after he slides at assume there is no friction

Where would aliens be if they really do exist here on Earth?