Earth's gravitational constant 9.8 m / s², whereas in 1.6 m / s². If a piece of rock in the earth weighs 50 N, find:

a.) mass of rock in the earth

b.) rock mass on the moon

c.) heavy stone in a month

How do noise canceling headphones work? A.) by stopping sound waves B.) by interfering with sound waves C.) by using antennas D.) by transmitting light waves

Two vectors have a sum A and their difference is B. If A=B then, the angle between the two vectors is a) 0 b) 45 c) 120 d) 90 (all the options are in degree)

A ray of monochromatic light having a wavelength of 4.00 x 10-7 meter in air passes from air through Lucite and then into air again. 1) Calculate the frequency of light in air. 2) Identify the color of the light.

A science museum has asked you to design a simple pendulum that will make 29.0 complete swings in 83.0 s. What length should you specify for this pendulum?

A painted tooth on a spinning gear has angular acceleration α = (20-t) rad/s2, where t is in s. Its initial angular velocity, at t = 0 s, is 320 rpm.

Compare and contrast the terms melting and freezing

A medical cyclotron used in the production of medical isotopes accelerates protons to 6.5 MeV. The magnetic field in the cyclotron is 1.9 T.

What is the speed of sound in a vacuum?

An object has 60 j of potential energy and 40 j of kinetic energy. then 10 j of the potential energy is converted into kinetic energy. how much work was done on the object?

At what height above earth's surface is the gravitational acceleration reduced from its sea-level value by 0.40%?