Which of the following changes can happen when the forces on an object are unbalanced?

a. The object speeds up

b. the object slows down

c. the object changes direction

d. all of the above

A sophomore with nothing better to do adds heat to a mass 0.300 kg of ice at 0.0 âc until it is all melted.

A positive rod is placed to the left of sphere A, and the spheres are separated

Ball a and ball b are rolled so that they will collide

Does the amount of iron in water affect plant growth

The graph shows two runners participating in a race. A graph with horizontal axis time (seconds) and vertical axis position in (meters). A green line runs from 0 seconds 5 meters to 10 seconds 30 meters.

An object has a mass of 8.00 kg. What is the gravitational force on the object by the earth?

Which of the following best characterizes the free energy change ΔG for an endothermic reaction under physiological conditions? A. The sign of ΔG is positive B. The sign of ΔG is zero C. The sign of ΔG is negative D.

In a recent hockey game, one player (m=100kg) was moving at a velocity of 8 m/s when he ran into another player (m=300kg) who was at rest (v=0m/s). After the collision, the two players were stuck together (moving with the same velocity).

In a laser, electrical energy is changed to light energy, and a small amount of the energy is wasted as heat. Describe the total amount of the heat in the system (using the conservation of energy).

What is the name for a star and planets held together by gravity? A. solar system B. galaxy C. black hole D. supernova