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In San Francisco a very simple technique is used to turn around a cable car when it reaches the end of its route. The car rolls onto a turntable, which can rotate about a vertical axis through its center. Then, two people push perpendicularly on the car, one at each end, as in the drawing. The turntable is rotated one-half of a revolution to turn the car around. If the length of the car is 9.40 m and each person pushes with a 170 N force, what is the magnitude of the net torque applied to the car?
A surface whose work function is 2.8 eV is illuminated by a light whose wavelength is 116 nm. What is the maximum velocity of a photoelectron emitted from the surface? The speed of light is 3 × 10^8 m/s and Planck’s constant is 6.63 × 10?34 J · s. An..
A 2kOhm resistor and 400mH inductor are connected in series to a 1300Hz generator with an rms voltage of 15V. what is the rms current in the current
An infinitely long wire is formed as in the diagram on your assignment. It is formed so that it has a circular portion of R = 50cm and the straight portion is located at a distance r from the center of the circular portion. Determine r (in cm) suc..
an electron that has a horizontal initial speed of 4.50 x 106 ms enters a region that has an electric field of 120 vm
an object moving with uniform acceleration has a velocity of 10.0 cms in the positive x-direction when its x-coordinate
A charge q= +5.80 x 10^-6 is located at the center of a regular tetrahedron (a four sided surface). find the electric flux through one face of the tetrahedron
A world champion hammer thrower, rotates at a rate of 3.5 revolutions/sec just prior to releasing the hammer. What was the linear velocity of the hammer at release
Lens L1 had a focal length of 15cm and is located a fixed distance in front of the film plane of a camera. Lens L2 had a focal length of 13 cm, and its distance d from the film plane can be carried from 5cm to 10cm. Decide the range of distances for ..
When a potential difference of 12 V is applied to a wire 5.6 m long and 0.28 mm in diameter the result is an electric current of 1.2 , What is the resistivity of the wire
The gravitational force that the sun exerts on the moon is perpendicular to the force that the earth exerts on the moon. find the magnitude of the net gravitational force on the moon
a box of mass m1= 5 kg. rests on a smooth horizontal floor next to a box mass m2= 10 kg. what is the acceleration of the boxes
0.20g of hydrogen gas are held in a rigid container. The temperature of the gas is changed from 50 K to 80 K. How much heat is needed.
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