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Ultrasound reflected from an oncoming bloodstream that is moving at 22.0 cm/s is mixed with the original frequency of 3.00 MHz to produce beats. What is the beat frequency?
A standard deck of cards contains 52 different cards. How many different poker hands are there
A copper (cu) penny has a mass of 3.11 g. The molar mass of copper is 63.5 g/mol. How many atoms of Cu are there ? what fraction of the electrons have been removed
You are a professional frontier re-enactor who specializes in making lead shot. To do this you put 1.3 kg of ice into 1.3 kg of water, both at 0 C, into an insulated bucket.
Suppose 60kW is to be transmitted over two 0.150? lines, Estimate how much power is saved if the voltage is stepped up from 200V to 2000V
Two balls, of masses = 60 and = 70, are suspended. The lighter ball is pulled away to a 67 angle with the vertical and released. Suppose that the positive axis is directed to the right.
A crane at a construction site lifts a concrete block with a mass of 440 kg from the ground to the top of a building with a height of 15.0 m
Consider the mass spectrometer shown schematically in the figure below. The electric field between the plates of the velocity selector is 5900 V/m, Calculate the radius r of the path for a singly charged ion
One-half mole of a monatomic ideal gas expands adiabatically and does 520 J of work. Specify whether the change is an increase or a decrease
A simple pendulum on the surface of Earth is found to undergo 13.0 complete small-amplitude oscillations in 7.05 s
A 20 g bullet inelastically collides with a 3 kg wooden block at rest. find How much energy is lost in the collision
A 282 kg log is pulled up a ramp by means of the rope that is parallel to the surface of the ramp. The ramp is inclined at 23.0° with respect to the horizontal. The coefficient of kinetic friction between the log and the ramp is 0.87, and the log has..
The spring constant for the tendon is the same for both groups, 32 {rm {N}/{mm}} . What is the difference in maximum stored energy between sprinters and nonathletes.
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