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The 22-cm-diameter disk in the figure below can rotate on an axle through its center. What is the net torque about the axle if F = 20 N?
If we consider the counterclockwise as the positive direction of motion, I got -1.02. However, for some reason, the website keeps telling me that my answer is wrong. I dont know why.
Find the velocity vector of a bag just before it hits the ground. It is dropped 500m above the ground and has velocity 5 m/s
When a flower petal is 4.0cm in front of a converging lens, the inverted image is half the height of the petal. What is the focal length of the lens? Please describe work/variables (eg f=focal length etc.)
A train has the length of 114 m and starts from rest with a constant acceleration at time t = 0 s. At this instant, a car just reaches the end of the train.
Two infinitely large plates are arranged so that they are parrallel, and seperated by a distance d. What is the approximate electric field outside the plates
Suppose that you pull on the rope OA shown in the figure, exerting a 50 N force F at O. What are the force vectors
A Carnot engine is operated between two heat reservoirs at temperatures of 530K and 300K. What is the thermal efficiency of the engine
On a cool morning, when the temperature is 16 deg Celsius, you measure the pressure in your car tires to be 20.0 psi. After driving 40 mi on the freeway, temperature of your tires is 56.0 deg Celsius. What pressure will your tire gauge now show.
An air bubble inside an 8.70 cm -diameter plastic ball is 3.00 cm from the surface. how far beneath the surface does the bubble appear to be
What is effectiveness of battery as an energy storage device
A rectangular coil of wire with 25 loops carries a current of 24.2 mA. The coil's dimensions are 8.5 cm by 2.3 cm. What is the magnetic moment of the coil
Two point charges and are held in place 4.50 apart. Another point charge -2.5 of mass 6 is initially located 3.00 from each of these charges and released from rest. You observe that the initial acceleration of -2.50 is 354 upward, parallel to the ..
A ski tow operates on a slope of angle 14.9? of length 340m . The rope moves at a speed of 11.8km/h and provides power for 50 riders at one time, Estimate the power required to operate the tow
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