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If you lift the front wheel of a poorly maintained bicycle off the ground and then start it spinning at 0.72 rev/s, friction in the bearings causes the wheel to stop in just 16 s.
If the moment of inertia of the wheel about its axle is 0.26 kg⋅m2, what is the magnitude of the frictional torque? Express answer with the appropriate units.
A ceiling fan is turned on and reaches an angular speed of120 rpm in 20 seconds. Through how many revolutions does the fan turn
a recipe for bread states that the dough must bake for 40 minutes at a temperature of 190degc. the oven you are using
Three 45 ohm lightbulbs and three 75 ohm lightbulbs are connected in series. what is the total resistance of the circuit
An unstrained horizontal spring has a length of 0.37 m and a spring constant of 340 N/m. Two small charged objects are attached to this spring, one at each end. The charges on the objects have equal magnitudes.
A 1.5 kg bicycle wheel with a radius of 0.27 m turns at a constant angular speed of 28 rad/s when a(n) 0.33 kg reflector is at a distance of 0.14 m from the axle. What is the angular speed of the wheel
A 66-kg man standing on a scale in an elevator notes that as the elevator rises, What is the acceleration of the elevator
The distance travelled by a particle in a straight line motion is directly proportional to t1/2, where t is the time elapsed. What is the nature of motion?
You have 11 m of 1.9 mm diameter copper wire and a battery capable of passing 12 A through the wire. What magnetic field strength could you obtain inside a 2.0 cm diameter solenoid wound with the wire asclosely spaced as possible?
a fan at a rock concert is 35.0m from the stage and at this point the sound intensity level is 108db . sound is
Consider the circuit shown in (Figure 1) . The batteries have emfs of E1=9.0V and E2=12.0V and the resistors have values of R1=28Ω, R2=64A?©, and R3=32Ω. Determine the magnitudes of the currents in each resistor shown in the figure. Ignore interna..
How to compute for the density of dark matter estimate mass density of dark matter in the solar neighbourhood. Express the answer in units of kg m-3, Msun pc-3, Msun AU-3.
Assess the efficiency of the current state of the national electric grid in the United States. Then, describe the key challenges in updating this grid to a so-called "smart grid".
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