A train travels 85 kilometers in 5 hours, and then 63 kilometers in 5 hours what is its average speed?

How does the direction of the lift on a plane compare with its weight as it flies at a constant speed and altitude? A. Lift acts downward, and weight acts upward. B. Both lift and weight act downward. C. Both lift and weight act upward. D.

Compare and contrast the sound waves produced by someone whispering and someone shouting.

An object is moving along a straight line, and the uncertainty in its position is 3.70 m. (a) find the minimum uncertainty in the momentum of the object.

If a positive test charge is placed in an electric field, what is the direction of the force on the test charge?

You have been hired by a venture capitalist to evaluate a concept engine proposed by an inventor, who claims that the engine consumes 100 MW at a temperature of 500 K, rejects 20 MW at a temperature of 300 K, and delivers 50 MW of mechanical work.

two punds of water vapor at 30 psia fill the 4ft3 left chmaber of a partitioned system. The right chmaber has twice the volume of the left and is initially evacuated.

Why do we eat today

Which statement about ammeters and voltmeters is true? A. Current and voltage are the same throughout a circuit so where you place the ammeter and voltmeter doesn't matter. B.

Teens realize that things may be "shades of gray" after they enter Piaget's social stage. identity crisis stage. menarche stage. formal operational stage.

Technician A says that fractured rods have a unique mating surface and that only the cap that was fractured is the one that will fit that rod. Technician B says that a powdered metal rod is less expensive, lighter, and as strong as a forged rod.