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Question: A 1.2m×1.2m×1.2m cube of nitrogen gas is at 20oC and 1.1 atm.
A- Estimate the number of molecules in the cube with a speed between 700 m/s and 1000 m/s.
I need the help to calculate the number of molecules in the cube. Thanks!
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Quesiton: A rock is tossed straight up with a velocity of 20m/s When it returns, it falls into a hole 10 m deep. What is the rock's velocity as it hits the bottom of thehole? How long is the rock in the air, from the ins ...
Question: Problem: During a very quick stop, a car decelerates at 7.2 m/s2. Assume the forward motion of the car corresponds to a positive direction for the rotation of the tires (and that they do not slip on the pavemen ...
A high-speed train is built to be 600 m long. The train is passing through a 500 m long tunnel. a. At what speed, according to an observer on the ground, the train will be just completely covered by the tunnel at one ins ...
Question: Part A: Which of the following gives the correct permitted values of ml for l=2? Part B: A second important result is that electrons will fill the lowest energy states available. This would seem to indicate tha ...
Question: One of the most worrisome waste products of a nuclear reactor is plutonium 239 ( 239 Pu). This nucleus is radioactive and decays by splitting into a helium-4 nucleus and a uranium-235 nucleus ( 4 He + 235 U), ...
Problem: A student knows that an ambulance siren has a frequency of fs = 393 Hz. He measures, when the ambulance is approaching him, the frequency fo = 415. Assume the speed of sound is 343 m/s in this problem. Randomize ...
The equation for motion for the ideal spring-mass system as derived in class is, ma+kx=0, where, m=mass, a=acceleration, k=spring stiffness, and x=displacement. 1) Describe briefly how the equation for motion arises from ...
Question: In short-track speed skating, the track has straight sections and semicircles 16 m in diameter. Assume that a 64kg \;kg skater goes around the turn at a constant 11m/s Part A: What is the horizontal force on th ...
A mass m is projected vertically upwards at t = 0 from y = 0 with initial velocity v0 > 0 along the y-axis. (+y is upwards) The mass moves under the constant force of gravity, and also a force of air resistance with magn ...
Question: A sump pump is draining a flooded basement at the rate of 0.650 L/s, with an output pressure of 2.00 ? 10 5 N/m 2 . Neglect frictional losses in both parts of this problem. (a) The water enters a hose with a 3 ...
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