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1. Estimate the degree of contamination in the grown material simply as
2. Verify that the mean free path L is much greater than the size of the apparatus. If the molecules have diameter d, they will hit all other molecules in a volume πd2x while travelling a distance x. On average they hit one other molecule when travelling one mean free path, so πd2 Ln = 1. (The same argument will be used for the mean free path of an electron in a solid in Section 8.2.) Estimate L both for the background gas and for the molecular beams, using the foregoing conditions.
Two astronauts, each having a mass M are connected by a length of rope of length d have a negligible mass. They are isolated in space, What is the final angular speed of the astronauts
A small object has a mass of 4.0 × 10-3 kg and a charge of -32C. It is placed at a certain spot where there is an electric field. When released, the object experiences an acceleration of 2.8 × 103 m/s2 in the direction of the +x axis. Decide the elec..
A bullet is shot into a block of plastic. The bullet penetrates the block 0.3 meter. Use Newton's Second Law to obtain the magnitude of the force exerted on the bullet by the plastic block
A gasoline engine fuel burns at a temp of 500 degrees Celsius. Its radiator cools to 70 degrees celsius. What is the engines Carnot efficiency
On a planet that has no atmosphere a rocket 15.4 meter tall is resting on its launch pad. The acceleration due to gravity on this planet is 5.45 m/s^2. Find how long does it take the ball to reach the launch pad
parachutist with a camera, both descending at a speed of 13 m/s, releases that camera at an altitude of 110-m.
A simple pendulum is 4.00 m long. What is the period of simple harmonic motion for this pendulum if it is hanging in an elevatoraccelerating upward at 7.00m/s2
What is a research question and What are the types of substantive and methodological criticisms that are made of past research?
Two long, straight wires are separated by a distance of 31.3 cm. Calculate the force per meter exerted on the 2.95 A wire
a pilot wants to fly due north a distance of 125km. the wind is blowing out of the west as a constant 35kmh. if the
water drops from the nozzle of a shower onto the floor 185 cm below. the drops fall at regular equal intervals of time
A 56.0-kg ice skater is moving at 3.94 m/s when she grabs the loose end of a rope, the opposite end of which is tied to a pole. obtain the force exerted by the horizontal rope on her arms
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