How we can separare the mixture of salt solution with sand

1. The photon energy for light of wavelength 500 nm is approximately (Show your work). 1.77 eV 3.10 eV 6.20 eV 2.48 eV 5.46 eV 2. Which of the following colors is associated with the lowest temperature? Explain your reasoning. A. Blue B. Green C.

IF there are 10.0 g of source and 8.0 g of oxygen, how many moles of sucrose are available for this reaction

The electrostatic force between two charges is 1.8 * 10-6 N when q1 = q2; that is, when the charges are equal in magnitude.

An aeroplane flies from London to Singapore, a total distance 7000 miles. The flight lasts 14 hours. Calculate the average speed of the aeroplane in mph.

Determine the weight of an average physical science textbook whose mass is 3.1 kilograms. The acceleration due to gravity is 9.8m/s2.

Under what conditions will an object experience a gravitational force? Under what conditions will an object experience an electric force? Under what conditions will an object experience a magnetic force?

A basketball player pushes down with a force of 34 N on a basketball that is inflated to a gauge pressure of 9 x 104 Pa. What is the diameter of contact between the ball! and the floor?

Match these terms with their definitions: 1. unit of electrical resistance ampere 2. unit of electromotive force or electrical potential ohm 3. unit for measuring the strength of an electric current volt 4. unit of electrical power watt

In which is momentum conserved: an elastic collision or an inelastic collision?

List the types of radiation in order from least to most damaging.