Which element in the earth's atmosphere is essential for human life, is extremely rare or nonexistent in the atmospheres of other planets in our solar system, and is primarily responsible for the development of life outside the oceans?

Technician A says that whenever a floor jack is used to raise a vehicle off the ground safety stands should be used to support the vehicle. Technician B says that the floor jack can support the vehicle safely as long as it is just for a short time.

Two particles are separated by a distance d. At this distance, the strong interaction between them is much greater than the electrical interaction. What are the possible values of d?

State the law of refraction

How many known elements are there?

Consider the following statements a. The centripetal acceleration might better be expressed as-T (t) because it is a vector b. The magnitude of the centripetal acceleration is vadial/R acceleration iS U acceleration iS U tangential d.

If there is a current of 15A in a circuit for 5 minutes, what quantity of electric charge flow through the circuit?

Which universal force acts on protons and neutrons in an atom's nucleus?

How many turns are in the secondary coil of a step up transformer that increases voltage from 30 V to 150 V and has seven turns in the primary coil?

What is a nuclear bulge? a) The bulging corner of a spiral galaxy consisting of gas in the shape of a spiral sphere that circles a galaxy b) The bulging center of a spiral galaxy consisting of debris in the shape of a flattened sphere that circles a

Your friend of mass 50 kg can just barely float in fresh water. Calculate her approximate volume.