Electric forces can be either repulsive or attractive, whereas gravitational force is always:

How does jet stream form

How is the human heart adapted to its function?

A wave is a disturbance that carries energy through space. Which of these characterizes the fundamental difference between mechanical waves and electromagnetic waves

The magnetic field of a bar magnet is the strongest ___. A: it is the same throughout the magnet B: at the poles of the magnet C: only on the north pole side of the magnet D: in the middle of the magnet

Element X has an electronegativity of 3.30. Element Y has an electronegativity of 3.25. The molecule XY is then best described as a:

Floating in deep space, you find yourself at rest next to a small asteroid. You reach out and tap the asteroid with a hammer. What happens to you in this process?

You walk forward at 1.5 m/s for 8s. Your friend decides to walk faster and starts out at 2.0 m/s for the first 4 s. Then she slows down and walks forward at 1.0 m/s for the next 4s. Make a distance-time graph of your motion and your friend's motion.

If the coolant in a refrigerator was not compressed back into a liquid after it flowed through the refrigerator what would happen

A electric model train travels at 0.339 m/s around a circular track of radius 1.75 m. How many revolutions does it perform per second, i. e, what is the motion's frequency?

Which characteristic best describes how nuclear decay differs from nuclear fission?