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At the instant when d = 28 cm of string has unwound off the disk, what is the torque exerted about the center of the disk?
Consider two planets with radius r1 and r2 are made from the same material so have the same density. What is the ratio of the acceleration of gravity (g1/g2) at the surface of these two planets?
The end of the thread there is a small spherical ball with a charge of +78.6 μC, and a mass of 0.954 kg. The angle that the thread makes with the plane is 37.3°. What is the charge density &s
What is the magnitude of the combined field due to these charges at the point (2.00, 3.00) m? (b) What is the direction of the combined field there (as an angle between 0° and 360°)?
Find the force constant k of the spring that will give the ball a speed of 101 cm/s when the plunger is released from rest with the spring compressed 2 cm from its relaxed position.
A 10000 car comes to a bridge during a storm and finds the bridge washed out. The 750 driver must get to the other side, so he decides to try leaping it with his car. The side the car is on is 20.4
what is the gravitational potential energy of the stone-Earth system (a) before the stone is released and (b) when it reaches the bottom of the well? (c) What is the change in gravational potential
How much 235U is consumed per year (in g/y) to produce enough electricity to continuously run a 100-W light bulb? How much coal (in g/y) would be needed (coal has a heat content of about 12 GJ/tom)?
Find the work required to turn an electric dipole end for end in a uniform electric field E, in terms of the magnitude P of the dipole moment, the magnitude E of the field, and the initial angle be
Determine the amount of heat this resistor dissipates during a 24-h period, the heat flux on the surfaces of the resistor, in W/m2.
Catching a wave, a 61-kg surfer starts with a speed of 1.3 m/s, drops through a height of 1.45 m, and ends with a speed of 8.2 m/s. How much nonconservative work was done on the surfer?
An electric dipole consists of charges +2e and -2e separated by 0.78 nm. It is an electric field of strength 3.6x10^6 N/C. calculate the magnitude of the torque on the dipole when the dipole moment
There are gaps in the visible spectrum at 573 nm and 655.00 nm. Calculate the minimum value of the index of refraction of the glass sheet that produces this effect.
What is the magnitude of the average force required to stop an 1500 kg car in 6.0 s if the car is traveling at 70km/h ?
The wavelength is 0.10 m, and the amplitude is 3.7 mm is propagating on the wire. The maximum transverse acceleration of a point on a wire is closest to?
A net force of 3,000N accelerates a car from rest to 36.0 km/h in 5.00s. (a) what is the mass of the car? (b) what is the weight of the car?
The Earth's rate of rotation is constantly decreasing, causing the day to increase in duration. In the year 2000 the Earth takes about 0.548 s longer to complete 365 revolutions than it did in the y
A particle moves in the xy plane with constant acceleration. At time zero, the particle is at r =<2,3> m and has velocity v = <3,-7> m/s. The acceleration is a constant and is given by a
The magnetic field is then reduced slowly at a constant rate, which induces a current = 0.20 in the loop. How long does it take for the magnitude of the uniform magnetic field to drop from 1.8 to ze
A dry cell does 7.5 J work through chemical energy transfer 5.00 C between terminals of the cell. What is the electric potential between the two?
A train is traveling up a 4.0 incline at a speed of 3.15 when the last car breaks free and begins to coast without friction. How long does it take for the last car to come to rest momentarily?
A piece of wire with mass per unit length 78 runs horizontally at right angles to a horizontal magnetic field. A 6.5 current in the wire results in its being suspended against gravity. What is the
Which characteristic did sociologist Darnell Hunt suggest would be most likely to affect the interpretations of news coverage events by social audiences?
The glider completes 7 oscillations in 39.0s. What are the (a) period, (b) frequency, (c) amplitude, and (d) maximum speed of the glider?
A sled is pulled with a horizontal force of 20 N along a level trail, and the acceleration is found to be 0.38 m/s2. An extra mass m = 4.0 kg is placed on the sled. If the same force is just barely