If a spaceship has a momentum of 30,000 kg-m/s to the right and a mass of

400 kg, what is the magnitude of its velocity?

A. 12,000,000 kg-m/s

B. 75 m/s

C. 1,200 kg-m/s

D. 300 m/s

What could be considered the opposite of reflection?

Two rooms are in contact. One is at 15°C and the other at 21°C. Choose the best statement concerning the heat flow. a) Heat will flow from the 21°C room to the 15°C room. b) Heat will flow from the 15°C room to the 21°C room.

How many times does the kinetic energy of a car increase when traveling 60 mph as opposed to traveling 30 mph? K. E. increases

A firebox is at 650 K, and the ambient temperature is 250 K. The efficiency of a Carnot engine doing 146 J of work as it transports energy between these constant-temperature baths is 61.5%. The Carnot engine must take in energy 146 J/0.62 = 237.

Jerome places a bag of flour on a scale. The scale shows that the bag has a weight of 17 N. Which is the reaction force of the bag sitting on the scale? A. The scale exerts a 17 N force up on the bag. B.

You find out that it takes 2 sec. for the swing to complete one cycle. what is the swing's period and frequency?

Can you chemical change or alter DNA

Give an example in which velocity is zero yet acceleration is not.

A 2,537-kg truck moving at 14 m/s strikes a car waiting at a traffic light, hooking bumpers. The two continue to move together at 8 m/s. What was the mass (in kg) of the struck car

Which of Newton's laws accounts for the following statement? "A force cannot act alone."