If your mass is 20kg, and you stand on the scale (witch is your force), and the acceleration due to gravity is10m/s^2, what does the scale says your weight is?

Explain where in a spiral galaxy you would expect to find globular clusters, molecular clouds, and atomic hydrogen.

Consider a system of a cliff diver and the earth. The gravitational potential energy of the system decreases by 24,500 J as the diver drops to the water from a height of 44.0 m. Determine her weight in newtons.

What two factors affect the speed of a sound wave as it travels through a medium?

Suppose that two objects form together (i. e., at the same time), in orbit around each other, one with a mass 15 times that of Jupiter, and the other 5 times that of Jupiter. Would these objects be classified as planets

If alex has mass of 60 kg on Earth, what is his mass on the moon?

Ethylene (C2H4) reacts with oxygen gas to produce carbon dioxide and water. 45.0 grams of ethylene reacts, how many grams of carbon dioxide gas will be produced?

What causes ice to melt and water to boil

A block of mass 3.5 kg slides down a frictionless inclined plane of length 6.4 m that makes an angle of 30 degrees with the horizontal. if the block is released from rest at the top of the incline, what is its speed at the bottom

What is the wavelength of an earthquake wave if it has a speed of 5 km/s and a frequency of 10 Hz?

The gamma ray released by each decay carries 140kev of energy. find the total energy e released by decays in the 2 hours.