
A beam of light traveling in air strikes the surface of mineral oil at an angle of 20.1 with the normal to the surface. If the light travels at 2.17 X 108 m/s in the oil, what are the following? (a) index of refraction of mineral oil

If you have 2.1 kg of dry ice, what volume will it occupy if you heat it enough to turn it into a gas at a temperature of 20 degrees C ?

Please answer problem 9 and 10.

A simple harmonic oscillator consists of a block of mass 3.50 kg attached to a spring of spring constant 210 N/m. When t = 2.30 s, the position and velocity of the block are x = 0.140 m and v = 2.810 m/s. (a) What is the amplitude of the oscillations? What were the (b) position and (c) velocity...

A swimmer wears a heavy belt to make her average density exactly equal to the density of water. Her mass, including the belt, is 60 kg. What is the swimmer's volume in m3? What is the simmer's weight in Newtons?

An electric wire that has a mass of 5.0kg for a 20 m length is strung between two poles 20 m apart. What must be the tension in the wire if it is to take 0.80 seconds for a pulse to travel along the wire from one pole to the other?

A block with mass m =7 kg is hung from a vertical spring. When the mass hangs in equilibrium, the spring stretches x = 0.24 m. While at this equilibrium position, the mass is then given an initial push downward at v = 3.9 m/s. The block oscillates on the spring without friction. Spring constant =...

A puck of mass 80.0 g and radius 4.20 cm slides along an air table at a speed of 1.50 m/s as shown in the figure below. It makes a glancing collision with a second puck of radius 6.00 cm and mass 125.0 g (initially at rest) such that their rims just touch. Because their rims are coated with...

A block with mass m = 6.7 kg is attached to two springs with spring constants kleft = 28 N/m and kright = 56 N/m. The block is pulled a distance x = 0.25 m to the left of its equilibrium position and released from rest. What is the magnitude of the net force on the block (the moment it is...

At t = 0 a block with mass M = 5 kg moves with a velocity v = 2 m/s at position xo = .33 m from the equilibrium position of the spring. The block is attached to a massless spring of spring constant k = 61.2 N/m and slides on a frictionless surface. At what time will the block next pass x = 0,...
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Sample Questions
 The Earth’s rate of rotation is constantly decreasing, causing the day to increase in duration. In the year 2000 the Earth takes about 0.548 s longer to complete 365 revolutions than it did in the year 1900.
 (a) What is the average angular acceleration of the Earth?
 (b) If this average acceleration remains constant, in what year will the Earths rotation come to rest?
1. Can you show me step by step how to solve this problem?:
 A spherical balloon is made from a material whose mass is 3.00kg. The thickness of the material is negligible compared to the 1.5m radius of the balloon. The balloon is filled with helium (He) at a temperature of 305degrees K and just floats in the air, neither rising nor falling. The density of the surrounding air is 1.19kg/m^3. Find the absolute pressure of the helium gas
2. I do not understand this Ideal Gas Law and Kinetic Theory question. Can you help me set it up?