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Q1. A student holding two weights close to his chest is sitting on a frictionless chair; the student and chair are rotating with an angular speed of 11.7 rad/s. The moment of inertia of Student + Weights + Chair system about an axis of rotation is 21.5 kg.m2. Currently the student extends his arms horizontally to increase the moment of inertia by 0.138 %. Discover the new angular speed of the system. (Give the answer in three significant figures and SI units)
Q2. A toroidal solenoid has 570 turns, cross-sectional area 7.00, and mean radius 4.70 .Calculate the coil's self-inductance. If the current decreases uniformly from 5.00 to 2.00 in 3.00, estimate the self-induced emf in the coil.
A physics student on Planet Exidor throws a ball, and it follows the parabolic trajectory, What was the ball's launch angle
An unstable nucleus of mass 2.9 10-26 kg, initially at rest at the origin of a coordinate system, Find the magnitude and direction of the velocity of the third particle
A 0.0100 kg wire, 2.00 m long, is fixed at both ends and vibrates in its simplest mode under a tension of 185 N. What could be the frequency of the tuning fork
(a) Calculate the number of electrons in a small, electrically neutral silver pin that has a mass of 12.0 g. Silver has 47 electrons per atom, and its molar mass is 107.87 g/mole. (b) Imagine adding electrons to the pin until the negative charge h..
If the range of discharge times that can be handled effectively is from 10.0 μ s to 6.00 ms, illustrate what should be the (a) lower value and (b) higher value of the resistance range of the resistor?
Charges q and Q are placed on the x axis at x = 0 and x = 2.0 m, respectively. If q = -40 pC and Q = +30 pC, define the net flux through a spherical surface (radius = 1.0 m) centered on the origin.
A flywheel in the form of a uniformly thick disk of radius 1.68 m, Calculate the constant torque required to stop it in 4.50 min
A ball of mass 1.7 kg hangs at the end of a string 1.2 m in length from the ceiling of a room. The height of the room is 4.0 m. What is the gravitational potential energy of the ball relative to the ceiling
Logan is given an initial speed of 4.00 m/s down a 20 %u030A incline. when he reaches the bottom of the incline
The acceleration of gravity is 9.81 m/s2 . Assuming that air resistance is simply a constant 93 N force on the person during the fall, evaluate the person’s velocity just before hitting the net.
The Earth and Moon are separated by about 400 ? 106 m. Suppose Mars is 1.6 1011 m from Earth and forms a right triangle with Earth and the Moon. determine the angular separation of Earth
IF Earth's orbit were suddenly to become much more eccentric. keeping orbital semimajor axis as is, Is our solar system typical in having all of its planets in very low eccentricity orbits
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