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 potential energy of a spring that is compressed 0.65 m by a 25 kg block if the spring constant is 95 N/m?

You know from experiment that a certain solution of fissile material dissolved in liquid is almost exactly critical when placed in a cubical "tank" 40 cm in width.

A gas is stored in a cylinder at a pressure of 6.0x10^5 N/m^2 and at a temperature of 10°C will be the change of the volume of the gas at 35° C if the pressure of the gars does not change?

What types of waves make up the electromagnetic spectrum?

Tina and her puppy are tugging on a rope, each pulling on opposite ends. When is Tina doing work? the entire time she plays with the puppy whenever she pulls the puppy toward her when she holds the rope steady as the puppy pulls it when she lets go

What are two possible uses of genetic engineering

How many joules are expended by a 70 kg man climbing up 6m of stairway? How much work is done if the climbing takes place on the surface of the moon? (Assume that the acceleration due to gravity on the moon's surface is 1.6 m/s2

A baseball flying through the air has kinetic energy because of its motion. true or false?

How many poles does Jupiter's magnetosphere have? a. 2 c. 8 b. 4 d. 9

Which describes nuclear fusion? The nuclei of two atoms combine to form a larger nucleus. The nucleus of one atom splits to form two smaller nuclei. The electrons of two atoms combine to form a cluster of electrons.