How do scientists know that the universe is expanding? A. Galaxies are moving away from one another. B. Hundreds of new galaxies form every year. C. No more stars are forming from nebulae. D. Stars are getting closer and closer together.

A storage tank exerts a force of 10000 newtons on the ground. The base of the tank in contact with the ground is a 4 m by 2 m rectangle Work out the pressure on the ground due to the tank.

How do scientists know that the universe is expanding? A. Galaxies are moving away from one another. B. Hundreds of new galaxies form every year. C. No more stars are forming from nebulae. D. Stars are getting closer and closer together.

Exercise In these calculations, use \( g=10 \mathrm{~ms}^{-2} \). Q8. A ball is thrown upward with a velocity of \( 30 \mathrm{~ms}^{-1} \). What is the displacement of the ball after 2 s ?

4. Matt is at the river and sees a rope swing tied to a tree branch overhanging the water below. As Matt swings out he releases the rope when he is 55 meters about the water. He launches at 25 degrees to the horizontal with an initial velocity \( 14 \mathrm{~m} / \mathrm{s} \). Calculate the following: a. The time while in the air. b. How far he traveled horizontally c. Peak height d. final velocity e. velocity after 0.5 seconds

Question 15 of 25 Visible light has a higher frequency than infrared light. What else is true about visible light? A. It has a shorter wavelength than infrared light. B. It has more energy than infrared light. C. It has a longer wavelength than infrared light. D. It has a higher speed than infrared light.