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A star rotates about its axis through a diameter once in 50 days. At the end of its life the star collapses to one hundredth of its orginal diameter. What will the rate of rotation of the collapsed star be?
An object with moment of inertia I1 is rotating freely (with no torque applied) with angular velocity w. What is the new angular velocity of the combined system
Monochromatic light shines on a diffraction grating. When the light source and the grating are in air, At what angle does the first-order maximum occur when the source and the grating are immersed in water (n = 1.32)
A satellite has a mass of 6434 kg and is in a circular orbit 4.36 × 105 m above the surface of a planet. What would be the true weight of the satellite
Two people initially separated by 75 m move toward each other. One with a speed of 3 m/s, how long is it before they meet
Imagine a very long, uniform wire that has a linear mass density of 0 . 0012 kg / m, What is the magnitude of the current in the wire that keeps it levitated just above the ground
A duct has an initial cross-sectional area of 0.58 m2. If the initial velocity of the air moving through the duct is 9.5 m/s, find what does the cross-sectional area have to be to increase the velocity to 15.0 m/s
A fan blade rotates with angular velocity given by ?z(t)= ? ? ? t2, where ? = 4.60rad/s and? = 0.795rad/s3, Calculate the angular acceleration as a function of time
In an RC circuit with a capacitance of 10µF and a voltage of 10V the voltage across the resistor after 4s is 4V. What is the resistivity in this circuit
A wire is 2.5 m long. Afterapplying a force to one end of the wire, it is now 2.506 m long. Calculate the tensile strain in the wire
In a crash test, a 1100 kg car slams into a concrete wall at 17.1 m/s and comes to rest in 0.275 s. a)Find out the magnitude of the impulse delivered to the car.b) Find the average stopping force.
A 1.6-m-long string fixed at both ends vibrates at resonant frequencies of 720 Hz and 960 Hz, When the tension in the string is 1162 N, what is the total mass of the string
s the speed of a wave on a string that has a mass of 3.3 kg and a length of 1.9 m while a 6.3 kg mass is hanging from the end?
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