The friction between two surfaces increases as: O the normal force between the surfaces decreases. O the normal force between the surfaces increases. O area between the surfaces increases O the coefficient of friction decreases

An airplane flies 40km directly south in 10 minutes and 20 km directly east in five minutes, its average speed is: a) 2.98km/min b) 2km/min c) 8km/min d) 4km/min

A car traveling at + 1.5 m/s accelerates at the rate of 0.65 m/s for an interval of 2.6a find vf

In 4 - 5 sentences, summarize the science of the sport of curling and how it relates to friction

A high amplitude sound wave can best be compared to a

Calculate the value of two equal charges if they repel one another with a force of 10 N having 10 m distance apart in a vacuum.

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