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An aluminum ball does not fit through a brass ring at 20oC. The diameter of the ball is 2.001 cm and the inner diameter of the ring is 2.000 cm. At what temperature does the ball just fit through the ring? The coefficient of linear expansion of aluminum is 24x10^-6 /C!.
Assume The resistance per length of the wire is 0.089 Ω/m. When the magnetic field is 0.5 T, find out the magnitude of the current through middle leg PQ of the circuit.
A hoop (I = MR^2) of mass 2.0 kg and radius 0.50 m is rolling at a center-of-mass speed of 15 m/s. What is the new speed of the center of mass of the hoop?
A 84.0kg skydiver can be modeled as a rectangular "box" with dimensions 24.0cm x 47.0cm x 178cm, What is his terminal speed if he falls feet first
If, as is typical, each of them breathes about 500 {rm{ cm}}^3 of air with each breath, approximately what volume of air (in cubic meters) do these astronauts breathe in a year.
A uniform plank of length 5.8 m and weight 202 N rests horizontally on two supports, with 1.1 m of the plank hanging over the right support (see the Illustrataing). To what distance x can a person who weighs 441 N walk on the overhanging part of t..
Two identical spheres are placed with centers 0.25 m apart, one is given a charge 20nC and the other-36nC, what will be the electric force each exerts on the other
a jetliner is moving at a speed of 270 km/h. the plan then decelerates at 4.5 m/s2. what is the minimum runway length on which this aircraft can land
When a satellite orbits the earth in a non-circular orbit which of the following is true.
Assume that you need to transfer 4689860 J of energy in ten minutes between the two reservoirs. What should the cross-sectional area of the steel rod
A gyroscope flywheel of radius 2.83 cm is accelerated from rest at 14.8 rad/s2 until its angular speed is 2760 rev/min. What is the radial acceleration of this point when the flywheel is spinning at full speed
With what minimum speed must you toss a 160 g ball straight up to hit the 10 m high roof of the gymnasium if you release the ball 1.60m above the ground? Solve this problem using energy.
Two long, straight wires are parallel and are separated by a distance of d = 0.230 m, The top wire in the sketch carries current I1 = 3.80 A, toward the right, and the bottom wire carries current I2 = 7.00 A, what are the magnitude and direction of t..
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