Which of the following is the closest estimate of the number of galaxies present in the universe?

One hundred

Ten thousand

Ten million

One hundred billion

Trumpeter A holds a B-flat note on the trumpet for a long time. Person C is running towards the trumpeter at a constant velocity. Person B is running away from the trumpeter at the same rate. Person D is standing still the whole time.

If it takes 200 joules of energy to lift a bucket of water 3 meters in 2 seconds, how much power would be required to do the same amount of work in 5 seconds?

Odina walked down the hall at school from the cafeteria to the band room, a distance of 100.0 m. A class of physics students recorded and graphed her position every 2.0 s, noting that she moved 2.6 m every 2.0 s.

What would be the final temperature of a mixture of 50g water at 20c temperature and 50g of water at 40c temperature?

Defanation of evaporqation

If a river is 20 feet wide in nature and needs to be scaled to one-tenth its real size, how wide should it be in a model?

A sample has a density of 30 g/ml. there is 60 ml of this substance. how much does it weigh?

Forgetting takes place only in short-term memory.

What is the simplest relationship between the angular wavenumber k and just one of the other kinematic variables? Express your answer using only one of the other kinematic variables plus constants like π.

The pilot of an airplane notes that the compass indicates heading west. The airplane's speed relative to the air is 100 km/h. The air is moving in a wind at 25.0 km/h toward the north.