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A person holds a ladder horizontally at its center. Treating the ladder as a uniform rod of length 2.75 m and mass 8.00 kg, find the torque the person must exert on the ladder to give it an angular acceleration of 0.220 rad/s2.
An electric power station is producing 1.2 x 10+3 W of power that is to be sent to a small town located 11 km away. Find the power lost in heating the wires
A 2.0 kg mass attached to a light spring with a spring constant of 46 N/m oscillates on a frictionless horizontal surface. Find the maximum speed of the mass in its oscillation
A long solenoid has n turns per unit length and is carrying a certain current i. An electron moves with speed v inside the solenoid in a circle of radius r perpendicular to the solenoid axis.
How long would it take her to reach the bottom of the hill, assuming she starts from rest and accelerates uniformly, if the elevation change is 335m.
The mechanical advantage of a hydraulic jack is 450. Find the weight of the heaviest automobile that can be lifted by an applied force of 60.0 N
A man stands at the midpoint between two speakers that are broadcasting an amplified static hiss uniformly in all directions. Find the total sound intensity that the man hears when he is at his initial position halfway between the speakers
A landing craft with mass 1.26×104 is in a circular orbit a distance 5.90×105 above the surface of a planet. The period of the orbit is 5600. The astronauts in the lander measure the diameter of the planet to be 9.80×106.
There are two coherent microwave sources in the x-y plane. These sources are emitting in phase at a wavelength of ? = 1.00 cm. where is the first source located on the y axis
Red light from three separate sources passes through a diffraction grating with 6.00×10^5 Lines/m. Calculate the angles for the first-order diffraction lines
Two 34 charges are attached to the opposite ends of a spring of spring constant 150 and equilibrium length 50. By how much does the spring stretch
If a capacitance meter applies a charge of 3.0 V across two plates and reads a capacitance of 30 pF, what is the charge on the plates
A bullet with mass m = 5:21 g is moving horizontally with a speed v = 498 m/s when it strikes a block of wood with mass M = 14.8 kg (initially at rest). What was the change in kinetic energy (J) of the bullet
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