What is the primary role of the respiratory system in living organisms?

A. to make carbon dioxide

B. to obtain oxygen

C. to use up nitrogen

D. to find hydrogen

A 900-kg car initially at rest rolls 50 m down a hill inclined at an angle of 5.0°. A 400-N effective friction force opposes its motion. A.

Discuss the advantages and disadvantages of series circuits compared to parallel circuits. Give an example of where each type of circuit could be used.

Why is Pluto no longer a planet?

What materials electricians should avoid wearing.

Which of the following describes pressure in a fluid? A. Pressure varies randomly throughout a fluid. B. Pressure decreases with increasing depth. C. Pressure remains unchanged with increasing depth. D. Pressure increases with increasing depth.

How to indicate kinetic energy

During induction, a positively charged rod is brought near to but not touching the electroscope. The presence of the charged object above the plate of the electroscope induces charges to move down into the gold leaves, giving the electroscope an

You are operating a boat with a power ventilation system. you have just fueled this boat. how long should you let the ventilation system run before starting the engine?

The force on a current-carrying wire is a maximum when the current is moving parallel to a magnetic field. true or false

In 1999, what percentage of 36-month-old toddlers had been toilet trained? 20 percent 40 percent 60 percent 80 percent