[UE L26] How does spectroscopy provide evidence supporting the big bang theory? It measures the redshift of galaxies, indicating the universe is expanding. It shows the distribution of dark energy across the universe It detects the presence of black holes in the early universe. It confirms the speed of light has changed since the big bang

13. What characteristics would you expect to find in an experiment that applies heat energy to a substance undergoing a phase change? A. The constituent particles of the substance change. B. The temperature of the substance keeps increasing as energy Is added. C. The temperature stops increasing as the structure of the substance changes. D. The intramolecular bonds of the substance break leading to the formation of newer molecules.

Suppose you exert a force of 212 N tangential to a 0235 m radius 75.0 kg grindstone (a solid disk). (Give your answers to at least 2 decimal places.) (a) What torque $(inN\cdot m)$ is exerted? (Enter the magnitude.) $\square $ N-m (b) What is the angular acceleration $(inrad/s^{2})$ assuming negligible opposing friction?(Enter the magnitude.) $\square rad/s^{2}$ (c) What is the angular acceleration (i) $nrad/s^{2})$ if there is an opposing frictional force of 20.6 N exerted 1.25 cm from the axis?(Enter the magnitude.) $\square rad/s^{2}$

If you place $a-0.238C$ charge at a point where the electric field is $134N/C$ to the right, what electric force will it feel? () N Include a+or - sign to indicate the direction of the force.

6. Suppose 88 grams of water are cooled from $22^{\circ }C$ to $16^{\circ }C$ How much heat is given off? 7. Suppose 16 grams of water are cooled from $13^{\circ }C$ to $1^{\circ }C$ How much heat is given off? 8. Suppose 10 calories of heat are added to 10 grams of water. The temperature of the water will increase by how much? 9. Suppose 100 calories of heat are added to 10 grams of water. The temperature of the water will increase by how much? 10. Suppose 50 calories of heat are added to 10 grams of water at $10^{\circ }C$ . What will the final temperature be?

2. If gravity is pulling the space station towards the Earth, why does it not crash into the Earth?

Match the subatomic particle with its charge: Proton $\square $ Neutron $\square $ Electron $\square $

What moon phase causes very high tides and very low tides to occur? The new moon and full moon because they are perfectly lined up with the earth and sun causing tides to be higher or lower than normal. First and full quarter moons Waning and waxing crescent

Light travels $3\times 10^{5}$ kilometers in one second . How far does it : travel in 44 seconds? Write your answer in scientific notation. $\square $ $\square $

During each second of free fall, the speed of a dropped object: changes by increasing amounts remains constant doubles increases by the same amount

10. How is the space an electron can occupy around the nucleus determined? By the size of the atom By distance from the nucleus By the energy of the electron By the number of protons in the nucleus