From which of the following do most astronomers today think that the solar system formed?

A. the sun

B. asteroids

C. shooting stars

D. a nebula

Which describes how sliding friction affects pushing a cereal box across a tabletop? It acts in the direction of motion. It acts in the direction opposite of motion. It is usually greater than static friction. It equals the weight of the box.

Imagine you had a bar of gold and decided to cut it in half. You repeated this process until eventually you could no longer cut the gold in half without splitting a single atom of gold.

A negative slope on the velocity vs. time graph indicates that the object is not accelerating A. True B. False

What is the period of a sound wave having a frequency of 340. hertz? (1) 3.40 * 10^2 s (3) 9.73 * 10^-1 s (2) 1.02 * 10^0 s (4) 2.94 * 10^-3 s

Describe a situation where you might have high velocity but low acceleration

You raise a 1200-N piano a distance of 5.00 m using a set of pulleys. You pull in 20 m of rope while exerting a force of 340 N.

Ina shoots a large marble (Marble A, mass: 0.08 kg) at a smaller marble (Marble B, mass: 0.05 kg) that is sitting still. Marble A was initially moving at a velocity of 0.5 m/s, but after the collision it has a velocity of - 0.1 m/s.

The elements that touch the zigzag line ar classified as

The half-life for a 100-gram sample of radioactive element X is 5 days. How much of element X remains after 10 days have passed? A. 25 g B. 100 g C. 75 g D. 50 g

During a transit, a passes in front of its parent star, temporarily decreasing the star's brightness by a small amount.