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Suppose a 20 kg ball moving at 5 m/s collides with a 100 kg ball moving at 3 m/s. After the collision, the two balls are locked together with a speed of 2 m/s. How much kinetic energy was lost in the collision?
Starting from rest, a 12-cm-diameter compact disk takes 3.3s to reach its operating angular velocity of 2500rpm. How much torque is applied to the disk
To get back to the shuttle, the astronaut unstraps a 10-kg tool kit and throws it away with a speed of 8 m/s. In the script, the astronaut, who has a mass of 80 kg without the toolkit, survives, but is this accurate.
Potential energy of a not obeing Hooke's law spring is given by the equation U(x)=5.00(J/m)x - 2.00(J/m3)x3, What is the expression for the restoring force of the spring
The dipole is held perpendicular to a uniform electric field with field strength 980V/m , then released. What is the dipole's angular velocity at the instant it is aligned with the electric field?
A parallel plate capacitor has a capacitance of 4.5 µF when filled with a dielectric. What is the dielectric constant of the dielectric
In a spherical metal shell of radius R, an electron is shot from the center directly toward a tiny hole in the shell, What is the magnitude of the electron's acceleration
It is possible to produce artificial gravity on a space station by having the station rotate. Explain how this would work. What would be some benefits and drawbacks to this approach?
A radio with a resistance of 40 ohms and a clock with a resistance of 20 ohms are connected in series on a 120V, What is each power supplied to the circuit in the parallel case, How much power is dissipated by each componant
A 30.0-kg child sits on one end of a long uniform beam having a mass of 20.0 kg, and a 40-kg child sits on the other end. How long is the beam
An elastic cord is 69 cm long when a weight of 57 N hangs from it but is 70 cm long when the weight of 75 N hangs from it. What is the "spring" constant k of this elastic cord.
An athlete crosses a 28 m-wide river by swimming perpendicular to the water current at a speed of 0.8 m/s relative to the water, How fast is the water in the river flowing with respect to the ground in m/s
How much work is done by the outside force in moving the particle from A to B?
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