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A hollow, thin-walled sphere of mass 12.0kg and diameter 47.0cm is rotating about an axle through its center. The angle (in radians) through which it turns as a function of time (in seconds) is given by ?(t)=At2+Bt4, where A has numerical value 1.10 and B has numerical value 1.50.
At the time 4.00s , find the angular momentum of the sphere.
At the time 4.00s , find the net torque on the sphere.
Quarks carry spin 1/2. Three quarks bind together to make a baryon (such as the proton or neutron); two quarks (or more precisely a quark and an anti-quark) bind together to make a meson (for example the pion or the kaon). Suppose the quarks are i..
A race car is moving with a velocity of 144 kilometers/hour. The driver applies the brakes, and the car comes to a halt in 12.0 seconds. What is the acceleration of the car after 12.0 seconds? A. -12 m/s^2 B. -3.3 m/s^2 C. 3.3 m/s^2 D. 10.3 m/s^2
What should the charge (sign and magnitude) of a particle of mass 1.49g be for it to remain stationary when placed in a downward-directed electric field of magnitude 700 N/C.
Two sound sources driven in phase by the equal amplifier are d = 4 m apart on the y axis. At a point a very large distance from the y axis, constructive interference is first heard at an angle θ1 = 0.140 rad with the x axis.
Two gravitational forces act on a particle, in perpendicular directions. To find the net force, can we add the magnitudes of those two forces?
What are the rocket's horizontal range, greatest height, and total time of flight. The magnitude of the torque of this force on the door with respect to the hinge is most nearly .
A weightlifter works out at the gym each day. Part of her routine is to lie on her back and lift a 40 kg barbell straight up from chest height to full arm extension, a distance of 0.51m. How many 400 Calorie donuts can she eat a day to supply that..
At t=0 a grinding wheel has an angular velocity of 20.0 rad/s. It has the constant angular acceleration of 29.0 rad/s^2 until a circuit breaker trips at time t = 2.20 s. From then on, it turns through an angle 435 rad as it coasts to a stop at cons..
A 1000-kg cart is rolling to the right at 5m/s. A 75-kg man is standing on the right end of the cart. What is the speed of the cart if the man suddenly starts running to the left with a speed of 10.00m/s relative to the cart.
A circular plastic disk of radius R, carrying a surface charge density? = ks, is rotating at constant angular velocity, Find the magnetic moment of the rotating disk
A swimming pool has dimensions 32 m 11 m and a flat bottom. When the pool is filled to a depth of 2.10m with fresh water, what is the force caused by the water on the end that is 11m.
A planet can have an atmosphere if the escape speed of the planet is 6 times larger than the thermal speed of molecules in the atmosphere. What is the radius of this object's orbit around the sun
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