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Question: A 45 turn coil of radius 5.4 cm rotates in a uniform magnetic field having a magnitude of 0.55 T. If the coil carries a current of 30 mA, find the magnitude of the maximum torque exerted on the coil.
The rules of tennis specify that the .057-kg ball must bounce to a height of between 53 and 58 inches when dropped from a height of 100 inches onto a concrete slab. What is the change in the momentum of the ball
An 85 kg jogger is heading due east at a speed of 1.6 m/s. A 55 kg jogger is heading 34° north of east at a speed of 3.6 m/s. compute the direction of the sum of momenta of two joggers
A large tank is filled with methane gas at a concentration of 0.690 kg/m3 The valve of a 1.37-m pipe connecting the tank to the atmosphere is inadvertently left open for eleven hours. What is the cross-sectional area of the pipe
A vertical solid steel post of diameter d = 21.4cm and length L = 2m is required to support a load of mass m = 7650kg. What is the stress in the post
For a convex mirror, when the object is 24.4 cm in front of the mirror the image is 15.8 cm behind the mirror. determine the distance of the image behind the mirror
a police officer in hot pursuit drives her car through a circular turn of radius 300m witha constant speed of 80.0km/h. what are the magnitude and the angle relative to vertical of the net force
Objective questions based on kinematics.
A motorcycle has a constant speed of 28.4 m/s as it passes over the top of a hill whose radius of curvature is 159 m. Find the magnitude of the centripetal force
A uniform plank of length 6m and weight 211N rests horizontally on two supports, with 1.1 m of the plank hanging over right support. To what distance x can a person who weighs 442N walk on the overhanging part of the plank before it just begins to..
Kathy Kool buys a sports car that can accelerate at the rate of 5.20 m/s2. She decides to test the car by racing with another speedster, Find the time it takes Kathy to overtake Stan
A rare isotope facility produces a beam of 7.11E5 nuclei per second of a rare isotope with mass 6.43E26 kg. What is the magnitude of the average force that this beam exerts on the beam stop
A helium-neon laser of the type often found in physics laboratories has a beam power of 4.00 mW at a wavelength of 633 nm. Calculate the force exerted on this sphere
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