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A uniform disk of radius 0.495 m and unknown mass is constrained to rotate about a perpendicular axis through its center. A ring with same mass as the disk\'s is attached around the disk\'s rim. A tangential force of 0.241 N applied at the rim causes an angular acceleration of 0.103 rad/s2. Find the mass of the disk.
A hare and a tortoise compete in a race over a straight course 1.40 km long. The tortoise crawls at a speed of 0.280 m/s toward the finish line. For how long in time was the hare stationary
The electric field strength is 4.80×10^4 V/m inside a parallel-plate capacitor with a 2.5 mm spacing. find the proton's speed when it reaches the negative plate
An induction cooktop generates an alternating magnetic field B(t)=(0.25 T)cos??t. Calculate the maximum emf induced in a pan modeled as a ring of radius 10 cm
An R = 49.8 ? resistor is connected in series with a C = 12.1 ?F capacitor and a 105 Hz, 110 V source. Calculate the current in the circuit
A cop car drives at 30m/s toward the scene of a crime, with its siren sounding (f = 2125 Hz.) Estimate the frequency heard by people at the crime scene as the siren approaches and the frequency heard as the siren moves away from people.
An airplane pilot wishes to fly to his destination 500 mi due west, but the wind is blowing at 21.5 mi/hr toward 18.9° north of west. what will be the speed of the plane relative to the ground
The radius of the earth's orbit around the sun is approximately 90 million miles (90*10^6). What is the speed of the earth in miles per hour
people often use the term energy crisis implying that we are running out of energy. how can this be if energy is
Charge is scattered uniformly throughout a long cylindrical shell of inner radius R and out radius 2R. At what radius is the electric field equal to one-half the value on the outer surface.
A string is wrapped around a pulley of radius 3.05? , and a weight hangs from the other end. What's the angular acceleration of the pulley
A parallel plate capacitor of capacitance 4.1 uF has the space between the plates filled with a slab of glass with k = 2.9, Find the energy stored in the capacitor after the glass is removed
A cylindrical container 2.00 tall contains mercury to a certain depth; the rest of the cylinder is filled with water. If the pressure at the bottom of cylinder is two atmospheres, what is the depth.
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