How do we determine the amount of dark matter in elliptical galaxies?

If the moon phase is seen as a waxing crescent moon in london, what phase of the moon would be seen in new york if it's viewed at the same time?

An object with mass of 2 kg is moving along a horizontal surface with a velocity components vx = 5m/s and vy = - 2.5m/s. What is the objects speed? What is its kinetic energy?

What is the potential energy of a 35 kg child sitting

Which of the following is not a form of energy? a. light b. pressure c. heat d. electricity

If a tree falls in the middle of the woods and nobody is around to hear it, does it make a sound?

Which force does not operate at a distance of 1 m? A. Weak nuclear O B. Electric C. Gravitational D. Magnetic

The deflection of alpha particles in rutherford's gold foil experiments resulted in what change to the atomic model?

What happens during evaporation? A liquid changes to a gas. A liquid changes to a solid. A gas changes to a liquid. A solid changes to a liquid.

In a nuclear reaction, what is the name for the difference in mass when one type of matter is converted into another? A. radiation B. nucleons C. antimatter D. mass defect

Aspect of the physical world