Describe two forms of energy-efficient transportation.

What holds a moon in its orbit? A. the heat generated by the planet it orbits B. the gravitational pull of the star it orbits C. its own internal magnetism D. the gravitational pull of the planet it orbits

Quiescent air is at 20°C (treat air as ideal gas). A plate of depth 50 cm and width 40 cm has a temperature of 40°C on the top surface. Calculate the heat dissipated from the top surface.

A nightlight uses 4.0W of power when plugged into an outlet. The current of the circuit is. 034A. What is the voltage across the light bulb's filament?

What layer of the atmosphere is made mostly of hydrogen and helium?

What quantities determine the resistance of a piece of material? Choose all that apply. The length of the piece of material The cross-sectional area of the piece of material The type of material The voltage across the material The current flowing

A train moves at constant velocity of 50km/h. how far will it move in 0.5h?

Which process best describes part of a scientific investigation? O designing a solution O evaluating the conclusion O evaluating the solution O identifying the conclusion

How many neutrons are in Cesium-130

You are standing outside during the daytime. How can you see a blade of grass? A. Light is produced by your eyes and travels out to the grass. B. Light is produced by the grass and travels straight to your eyes. C.

Are cosmic rays and gamma rays invisible or do they have color?