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Question: A lottery machine uses blowing air to keep 2000 Ping-Pong balls bouncing around inside a 1.0 x 1.0 x 1.0 m box. The diameter of each ball is 3.0 cm.
A- What is the mean free path between collisions?
If possible just a brief explanation how you got the answer?
A mad doctor believes that baldness can be cured by warming the scalp with sound waves. His patients sit underneath the Bald-o-Matic loudspeakers, how many minutes should each therapy session last
A photon with a wavelength of 3.70×10?13 m strikes a deuteron, splitting it into a proton and a neutron. calculate their speeds after the photodisintegration
A 100-W lightbulb has a resistance of about 12Ω when cold (12 C) and 140Ω when on (hot). Estimate the temperature of the filament when hot assuming an average temperature when hot assuming an average temperature coefficient of resistivity a =0.0060 ..
A bird sits on a telephone wire midway between two poles 20m apart. The wire, assumed weightless, sags by 50cm. If the tension in the wire is 90N, what is the mass of the bird?
if a person can jump a maximum horizontal distance by using a 45deg projection angle of 4.72 m on earth what would be
two appliances are connected in parallel to a 120-v battery and draw currents i1 5.0 a and i2 3.9 a. if these
Two ultrasonic sound waves combine and form a beat frequency that is in the range of human hearing for a healthy young person, What is the largest possible value for the frequency of the other ultrasonic wave
A wave has a wavelength of 456m and a frequency of 200Hz. What is the period of the wave? What is the wave speed?
Light of wavelength 634 nm is incident perpendicularly on a soap film (with n =1.35) suspended in air. What are the smallest two thicknesses of the film for which the reflections from the film undergo fully constructive interference?
Assume we have an infinitely long wire carrying a current of 2.50 A. It is bent into an L-shape extending into positive infinities along x- and y- axes. Find out the magnitude of the magnetic field at a point P with coordinates (0.30 m, 0.30 m)
In a home laundry dryer, a cylindrical tub containing wet clothes is rotated steadily about a horizontal axis as shown in the figure below. what rate of revolution is needed
A car speeds up as it turns from traveling due south to heading due east. Find the radial component of the acceleration at that point
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