1 the life cycle of a star begins with a cloud of gas and dust called a

Which statement correctly describes how thermal energy tends to spontaneously flow? A. from high temperature to low temperature B. from low temperature to high temperature C. with a decrease in kinetic energy D.

How does nitrogen from the air get into the bodies of plants and animals?

The amount of oxygen in the reactants is 4 atoms. In the products, the oxygen is distributed to water (H20) and O2 gas.

For al, its atomic number is 13 and its mass number is 27. how many neutrons does it have

What is the advantage of combining carbon from coal with steel?

When observed from Earth, the wavelengths of light emitted by a star are shifted toward the red end of the electromagnetic spectrum. Why does this redshift occur?

Object A has a length of 3 cm, a width of 10 cm, and a height of 2 cm. Object B is dropped into a graduated cylinder. It displaces 60 mL of water. The volume of object A is:

Is the following sentence true or false? Some information about an object or process may be missing from a model.

If V is a velocity, l a length, and v a fluid property having dimensions of L2T-1, which of the following combinations are qualitatively dimensionless (show work for a through d) : (a) V l v (b) Vl/v (c) V2v (d) V / (l v)

What happens to the total mechnical energy of the apple as it falls from the tree?