What's the difference between a physical and chemical change and how do you know which is happened?

A car slows from 22m/s to 3.0m/a at a constant rate of 2.1m/s. How many seconds are required before the car is traveling at 3.0m/s?

The states labeled "No Voting Rights" in 1919 would have been MOST affected by which Constitutional Amendment? A) 18 B) 19 C) 25 D) 26

Two small, positively charged spheres have a combined charge of 5.23 x 10^-5 C. If each sphere is repelled from the other by an electrostatic force of 1.00 N when the spheres are 2.

Which statements describe density? Check all that apply. Density is a chemical property of an object. The density of an object is constant. Density is a derived unit of measure. Density is the sum of the mass and volume of an object.

What do scientists use a scientific law for?

Newtons third law describes the forces between two colliding objects. use this connection to explain the forces acting when you kick a soccer ball

In the heat equation, what does c represent

5. A balloon is ascending at the rate of 4.9m/s. A pocket is dropped from the balloon when situated at a height of 245m. How long does it take the packet to reach the ground? What is its final velocity?

What is the one thing you can do to control the momentum your car carries in a potential crash?

Two charges q1 and q2, that are distance d apart, repel each other with a force of 6.40 N. what would be the force between two charges q1 and = 2q and q2=3q, that are distance d apart?