The amount of matter (mass) in a given unit volume

Which is heavier 1kg of iron or 1 kg of feathers? Which occupies more volume 1kg of iron or 1kg of feathers? Which has a larger density, iron or feathers?

Life of a Star Cluster. Imagine you could watch a star cluster from the time of its birth to an age of 13 billion years. Describe in one or two paragraphs what you would see happening during that time?

How are airbags tested?

Convert 87°F to Celsius scale?

What causes the sky to be blue

Is burning a nonrenewable natural gas a chemical change

The magnitudes of the vertical and horizontal components of a vector are 11 and 17 centimeters respectively. Find the magnitude of the vector and the angle from the horizontal axis.

A rectangular coil with sides 0.10 m by 0.25 m has 500 turns of wire. It is rotated about its long axis in a magnetic field of 0.58 T directed perpendicular to the rotation axis.

Stars set about how many minutes earlier each day? A. 8 B. 6 C. 4 D. 2

Whose atomic theory explains how atoms emit and absorb light