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Questions in physics

[Answered] What's the efficiency of a car that uses 400,000 J of energy from gasoline to produce 48,000 J of kinetic energy?

[Answered] Which form of energy does a plant store when light is transformed during photosynthesis? A. Chemical energy B. Thermal energy C. Mechanical energy D. Electrical energy

[Answered] True or False: Along a divergent boundary, two plates slip past each other, moving in opposite directions.

[Answered] 1. How does friction affect forward motion? Give an example. 2. Describe two ways to change the frictional force between two solid surfaces. - Change the lubrication between the two surfaces. - Change the normal force between the two surfaces. 3. How does air resistance affect the velocity of a falling object? 4. What two sources of friction do you have to overcome when you are walking? 5. If you push a chair across the floor at a constant velocity, how does the force of friction compare with the force exerted? Explain. 6. If you push a book against a wall hard enough, it will not slide down even though gravity is pulling it. Use what you know about Newton’s laws of motion to explain why the book doesn’t fall.

[Answered] Newtons third law of motion is also known as the law of ?

[Answered] An airplane travels 3,260 kilometers in 4 hours. What is the airplane’s average speed?

[Answered] You measure or observe two events to occur at the same time: one nearby and one further away. Which event did you actually see first?

[Answered] Suppose you ride your bicycle to the library traveling at 0.5 km/min. It takes you 25 minutes to get to the library. How far did you travel?

[Answered] An object of mass 2 kg has a linear momentum of magnitude 6 kg·m/s. What is this object’s kinetic energy?

[Answered] How many miles can you get on one tank of gas if your tank holds 18 gallons and you get 22 miles per gallon?