What is a sentence that could explain a result and can be tested?

What must the condition of the alveoli be in order for gas exchange to occur

Bales of hay of 40 lbf move up a conveyor set at 30° angle to the ground. If the hay bales are moving at 1.5 ft/sec, determine the power required to move each bale, neglecting any wind or air resistance.

A 5kg mass resting on a smooth horizontal, frictionless table is connected to a cable which passes over a pulley and then is fastened to a hanging 10kg mass. find the acceleration of the two objects and the tension of the string.

Which of the following statements about this system of lumps must be true? A. The momentum of the system is conserved during the collision. B. The kinetic energy of the system is conserved during the collision. C.

Complete the sentence to describe what a wave is and what it does. A wave is a disturbance that carries from one place to another through matter and space.

A theory is an explanation of observable facts and phenomena. True of false.

What are types of astronomy?

What is the ampere a measure of?

How do you know that a speedometer tells you the instantaneous speed of a car?

Margaret swam 100 meters in 5 minutes. What was her swimming speed? 100 meters per minute 50 meters per minute 20 meters per minute