Which statement about stars is correct?

F

Star formation begins in a nebula.

G White dwarfs become main-sequence stars when they gain mass.

H

Supergiants are stars that can absorb black holes.

J Main-sequence stars are formed by comets.

In an isolated system bicyclist 1 and bicyclist 2 each with a mass of 80 kg, collide. bicyclist 1 was moving to the right at 8 m/s, while bicyclist 2 was moving to the left at 2 m/s. what is the magnitude of their combined momentum before the crash

How do these frogs vary from each other? Give a reason to support your answer.

What occurs when vibrations traveling through an object match the objects natural frequency

5. How are humans affecting global climate change?

Which of the following statements is FALSE about collisions? (Consider Newton's Laws an the Conservation of Momentum.

A tree is standing in the middle of a meadow. As you watch, the wind begins to blow and the tree bends. Which statement best explains how you could tell that a net force was acting on the tree? OA) The tree had momentum.

Consider two cars, a 700kg Porsche and a 600kg Honda Civic. The Porsche is speeding along at 40 m/s (mph) and the Civic is going half the speed at 20 m/s.

Which statement about an electron in the 4d state is correct? A. The magnitude of its orbital angular momentum is 6√ℏ. B. The largest orbital angular momentum it could have in any given direction is 4ℏ. C.

A D note has a frequency of 587.33 Hz. Calculate its wavelength in meters. The speed of sound is 343 m/s

A cyclist allows his bike to roll down a hill without pedaling. Towards the bottom of the hill he applies his brakes. The bike comes to a stop. Applying the brakes causes the brakes to warm up. Describe the energy transfers that have occurred.