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A baseball pitcher pivots his extended arm about his shoulder joint, applying a constant torque of 190 N · m for 0.21 s to his arm, which has a moment of inertia of 0.63 kg · m2. What is his arm's angular acceleration and final angular velocity, assuming it starts from rest.
Calculate the force of gravity on a spacecraft 32000 km (5 earth radii) above the Earth's surface if its mass is 1800 kg. N (toward the earth)
When one gallon of gasoline is burned in a car engine, 1.18 x 10^8 J of internal energy is released. Suppose that 0.99 x 10^8 J of this energy flows directly into the surroundings (engine block and exhaust system) in the form of heat. If 6.0 x 10^5 J..
A square loop of wire with dimensions L x L lies in the xy plane, moving along the x direction with a speed v. Find the induced emf as the loop moves from one region to the next
Light from a helium-neon laser (? = 633 nm) passes through a circular aperture, What is the diameter (in mm) of the hole
A 821 kg car is going 29 m/s and the driver has to slam on his brakes to prevent an accident. what is the change in temperature of the brake pads and rotors
What are memory tricks, and explain in theoretical terms why they work?
You bring a 350-g wrench into the house from your car. The house is 15 C warmer than the car, and it takes 2.52 kJ of energy to warm the wrench by this amount. Find (a) heat capacity of the wrench and (b) specic heat of the metal it's made from.
What must the charge (sign and magnitude) of a particle of mass 1.42g be for it to remain stationary when placed in a downward-directed electric field of magnitude 610N/C ? Use 9.81m/s^2 for the magnitude
A heat that goes into a particular carnot engine is 4.72 times greater than the work it performs. What is the engines efficiency
A 0.020-kg bullet is shot horizontally and collides with a 1.35-kg block of wood. The bullet embeds in the block, what was the original speed of the bullet
A particle with charge ?2 µC is located on the x-axis at the point 4 cm, What is the magnitude of the total electrostatic force on a third particle with a charge of -2 µC placed on the x-axis at -2 cm
charge of -2.95 µC is fixed at the center of a compass. Two additional charges are fixed on the circle of the compass, which has a radius of 0.097 m. The charges on the circle are -3.85 µC at the position due north and +5.20 µC at the position due ea..
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