What causes interstellar dust and gas to start to contract and form a protostar?

1) the shockwave from a supernova

2) nearby black hole

3) an increase in the solar wind

4) nuclear fusion

Helium decays to form lithium. Which equation correctly describes this decay?

What steps are involved in converting potential energy to kinetic energy, or kinetic energy to potential energy?

A wind turbine primarily uses which type of energy

The magnitude of the magnetic field in a magnetic resonance imaging (MRI) machine can be as great as B = 2.0T. Under normal circumstances, this field cannot be shut off by just flipping a switch.

In a video game, a flying coconut moves at a constant velocity of 20 meters/second. The coconut hits an obstacle and moves in the opposite direction with a constant velocity of 10 meters/second. What's the change in velocity of the coconut?

Which statement describes a scientific theory? A theory states how something behaves without explaining why. A theory is a proven fact that cannot be changed. A theory changes based on new observations and testing.

What are the differences between deterministic forces and thermal agitation?

What causes the acceleration to increase or decrease?

When You lift a load, the resistance force is? A. magnetism b. gravity

What changes a ball velocity