A spectroscope creates a spectrum, or array of colors, based on the light emitted by a star. How are

scientists able to use these colors to determine which elements the star contains?

A car travels 40km/hr for 2 hours and 55km/hr for 2 hours how far has the car traveled what's its average velocity?

How do you know when electric current is flowing in a lightbulb circuit?

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

Why is Uranus a planet and not a moon of Neptune

True or false. there would be no like in earth without the sun

A dc generator is the same as a (n) a. electric motor. b. ac generator. c. armature. d. electric current.

Which of the following best describes scientific knowledge A.) Durable B.) Absolute and never changing C.) Frequently varies

Beth made the chart shown. A 2-column table with 1 row. The first column labeled X has entries Wall clock, T V remote control, Portable music player. The second column labeled Y has entries Refrigerator, Table lamp, Hair dryer.

Which sentence states Newton's third law? If two objects collide, each object exerts a force in the same direction as the other. If two objects collide, each object exerts a force equal to and in the opposite direction of the other.

Why did the chicken cross the road.