What causes an object to move, change direction or change speed?

a balanced force

an unbalanced force

any force exerted on it

A glass lying on table doesn't possess friction. why?

Part A (4 pts) Consider light of wavelength λ = 670nm traveling in air. The light is incident at normal incidence upon a thin film of oil with n2 = 1.75. On the other side of the thin film is glass with n3 = 1.5.

1200 kg car is being driven down a road. If it has 101 kJ of kinetic energy, what is its speed?

A 0.012kg rubber bullet travels at a velocity of 150m/s, hits a stationary 8.5kg concrete block resting on a frictionless surface, and ricochets in the opposite direction worth a velocity of - 100m/s. how fast will the concrete block be moving?

How did air friction affect the cars motion

What will most likely happen if a light wave moves through a solid?

Ben franklin showed that 1 teaspoon of oil would cover about 0.50 acre of still water. if you know that 1.0 x 104m2 = 2.47 acres, and that there are 5.0 cm3 in a teaspoon, what is the thickness (in cm) of a later of oil?

Which of the following are indicators of chemical changes (choose all that apply): 1. A solid is formed 2. Heat is released or absorbed 3. A gas is released 4. Light or Sound is Produced 5. State of Matter changes 6. A color change takes place 7.

How long do your guests have to wait until the steaks are ready?

Newton discovered that gravity behaves differently in space than it does on Earth. true or false?