When an object is totally immersed in water, it's weight is recorded as 3.1N if it's weight in air is 4.9N calculate the upthrust acting on this object

A diffraction grating with 210 lines per mm is used in an experiment to study the visible spectrum of a gas discharge tube. At what angle from the beam axis will the first order peak occur if the tube emits light with wavelength of 506.0 nm

The photon energy for light of wavelength 500 nm is approximately (Show your work). A. 1.77 eV B. 3.10 eV C. 6.20 eV D. 2.48 eV E. 5.46 eV

A 4.0 kg food pack was dropped from a height of 200 m by a helicopter during flood relief operations. At what velocity will the food pack be falling halfway to the ground?

What carries the oxygen to every cell of your body

The first law of thermodynamics states that E=Q-W. How is this also a statement of the principle of conservation of energy?

Why is it important for engineers to design bumper cars safely

What must her minimum speed be just as she leaves the top of the cliff so that she will miss the ledge at the bottom, which is 1.75 m wide and 9.00 m below the top of the cliff?

Which statement describes how light behaves when it strikes a translucent material? A. Light is scattered. B. Light is transmitted. C. Light is reflected. D. Light is absorbed.

A certain gas is present in a 15.0 l cylinder at 2.0 atm pressure. if the pressure is increased to 4.0 atm the volume of the gas decreases to 7.5 l.

Choose all the answers that apply. To qualify as a planet, a celestial object must: have an irregular shape revolve around the sun orbit in a clear area have enough gravity to have a spherical shape have a satellite