Which of these is an example of a chemical change?

Question 4 options:

fireworks exploding

grinding powder

melting cheese

ironing a shirt

While in empty space, an astronaut throws a ball at a velocity of 13 m/s. What will the velocity of the ball be after it has traveled 6 meters?

Which are examples of projectile motion? Check all that apply A. A soccer ball rolling across the ground in the northeast direction. B. A car turning a corner, so it is heading south. C. A tennis ball lobbed over the net. D.

One circuit is equivalent to another when (a) the same load has the same voltage and current when connected to either circuit (b) different loads have the same voltage and current when connected to either circuit (c) the circuits have equal voltage

The gauge pressure in each of the four tires of an automobile is 230 kpa. if each tire has a "footprint" of 180 cm2 (area touching the ground), determine the mass of the car.

Assume that a pitcher throws a baseball so that it travels in a straight line parallel to the ground. The batter then hits the ball so it goes directly back to the pitcher along the same straight line.

Describe the rise and fall of a basketball using the concepts of kinetic energy and potential energy

Another word for character in sports is "sportsmanship." - True False

Assume an 8-kg bowling ball moving at 2m/s bounces off a spring at the same speed that it had before bouncing. What is the momentum of the recoil?

A physics book slides off a horizontal tabletop with a speed of 3.90 m/s. It strikes the floor in 0.350 s. Ignore air resistance. Find the height of the tabletop above the floor.

A guitar string 66 cm long vibrates with a standing wave that has two antinodes. 1. Which harmonic is this 2. what is the wavelength