What does it mean to say that current and voltage in a circuit are directly related?

Which is a gas at room temperature? A) aluminum B) nitrogen C) potassium D) sodium

Which of the following statements best describes Kepler's law of ellipses?

If a guitar string vibrates 20 times each second, what is its frequency?

Billy drops a water balloon from the roof of his house. Since the balloon began with an original velocity of zero, how far above ground was the balloon if it took 2.5 seconds to hit the ground?

5.0 kg and 7.0 kg weight are placed on opposite ends of a massless 4.0 m rod (5.0 kg on the left, 7.0 kg on the right).

When a cyclist rides past you on the street, this is an example of

Why are galaxies visible

I hockey puck slides across an ice rink more easily than it does across a rough concrete surface why is this

Sodium-22 Sodium-25 # of protons # of neutrons # of electrons

As the particles of a solid undergo sublimation, they A: lose energy B: move closer to one another C: change temperature D: move farther apart from one another