A ruby has a density of 3.9 g/cm³. What is the mass of the ruby, if its volume is 5 cm³?

A. 0.78 g

B. 1.28 g

C. 8.9 g

D. 19.5 g

What is the difference between speed and velocity and give an example.

A water wave with a wavelength of 35.6 cm approaches a wall with a large opening in it. The hole begins to close. What size does the hole in the wall need to be for the wave to noticeably diffract through the hole? Justify your answer.

Is the speed of light the same in any material?

An atom that has a different mass due to a different number of neutrons

How gravity affect time? With reference to einstein special theory of relativity

The half-life of carbon-14 is 5730 years. How long will it take for the number of carbon-14 nuclei in a sample to drop to a quarter of the original number? Enter your answer as a number years

Which object has more thermal energy a bowl of soup or pot of soup

When you look into a clear pond, a fish may appear to be in a different position than it actually is. What is this caused by? A. diffraction B. dispersion C. refraction D. reflection,

How long would it take to drive to alpha centauri (4.4 light-years away) ?

A type of fault where the hanging wall slides upward