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1. What is the maximum uncertainty in the measurement of the oscillation frequency in a Josephson junction if the voltage standard of 1 mV is to be maintained within 1 part in 1010? Assume a reference frequency of 483.6 GHz.
2. Find the minimum acceleration needed for a maglev train to reach a speed of 430 km/h in 3.0 km, one tenth of the length of the 30-km track in Shanghai. Express your answer as a fraction of g, the free-fall acceleration near Earth. Would this acceleration be noticeable?
When the motorcyclist is at the top of the loop, as shown, he has a speed of 20 m/s. At this instant, what is the normal force on the cyclist?
A dentist's drill starts from rest. After 3.50 s of constant angular acceleration it turns at a rate of 2.4*104 rev/min. Discover the drill's angular acceleration.
A student could either pull or push, at an angle of 30? from the horizontal, a 55kg crate on a horizontal surface, Calculate the minimum work required for both pulling and pushing
Megan's mass is 28kg. She climbs the 4.8m ladder of a slide and reaches a velocity of 3.2m/s at the bottom of the slide. How much work was done by friction on Megan? Assume that air resistance is negligible.
a solid uniform spherical marble with mass 1kg and r .02m rolls down a hill starting from rest. the hill is 1m high and
One end of a 0.23-m copper rod with across-sectional area of 1.10 10-4 m2 is driven into thecenter of a sphere of ice at 0° C (radius = 0.14 m). The portion of the rod that is embedded inthe ice is also at 0° C.
In the domain of elementary particles, a natural unit of mass is the mass of a nucleon, that is, a proton or a neutron, the basic massive building blocks of ordinary matter. Given the nucleon mass as 1.67 · 10-27 kg and the gravitational consta..
q1. if 25grams of water at 100 degrees celsius are mixed with 15 grams of water at 40 degrees celsius what temperature
A collimated laser beam that is 2 mm in diameter is expanded using a pair of positive lenses arranged in a Keplerian telescope configuration, such that the final beam diameter is 10 mm. If the focal length of one lens in the pair is 3 cm, what is the..
Nichrome wire of cross-sectional radius 0.754 mm is to be used in winding a heating coil. calculate the length of wire you must use to wind the coil
A particle in the solar system is under the combined influence of the Sun's gravitational attraction and the radiation force due to the Sun's rays, Calculate this critical radius
Illustrate what diameter has tip of the hour hand with 100 mil/hr tangential speed? If a 10 inch wide top is spinning at 300 RPM, what is the tangential speed at the widest part?
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