Fluorine-21 has a half-life of approximately 5 seconds. What percentage of the original nuclei would remain after 20 seconds

Suppose your hair grows at the rate 1/31 in. per day. find the rate at which it grows in nanometers per second. because the distance between atoms in a molecule is on the order of 0.

A girl lifts a 160-N load to a height of 1 min 0.5 s. How much power is used to lift the load? A. 320 W B. 80 W C. 32 w D. 160 W

What is the main way sound waves cause hearing loss?

In which state of matter are particles held together but still able to move around each other? A. gas B liquid C. vapor D. ice

How long must a current of 100ma flow so as to transfer a charge of 80c

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?