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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.
A 0.015 kgrecord with a radius of 15 cm rotates with an angular speed of 33 1/3 rpm. What is the fly's angular momentum
A 33.0-kg packing case is initially at rest on the floor of a 1580-kg pickup truck. Find the magnitude of the friction force acting on the case
Compute what energy is dissipated by a lightning bolt having an 18,000 Amp current, a voltage of 106 MV, and time duration of 1.00 milliseconds
assuming the specific heat of the body is the same as water calculate the temperature rise due to a total body dose of
The half-life of a muon is 2.2 s as measured in its rest frame. How fast must a beam of monoenergetic muons is travelling if half of them are observed to decay in 3.3 s
A 195-kg load is hung on a wire of length of 3.30 m, cross-sectional area 2.00 10-5 m2, and Young's modulus 8.00 1010 N/m2. What is its increase in length
hree uniform meter sticks, each of mass , are placed on the floor as follows: stick 1 lies along the axis from = 0.210 m to = 1.21 m, Calculate the location of the center of mass of the meter sticks
A particle with charge -1.00 C initially moves at v = 1.00i +7.00j m/s. If it encounters a magnetic field B = 60.0 k T, find the force on the particle
A 22 child slides down a 2.4 -high playground slide. She starts from rest, and her speed at the bottom is 1.9 What is the change in thermal energy of the seat of her pants?
An unstable particle is at rest and suddenly breaks up into two fragments. No external forces act on the particle or its fragments. What is the velocity of the more massive fragment
You step onto a hot beach with your bare feet. A nerve impulse,generated in your foot, How much time does it take for the impulse
two identical capacitors are connected in parallel to an ac generator that has a frequency of 650 hz and produces a
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