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A runner wearing spiked shoes pulls a 24kg sled across frictionless ice using a horizontal spring with spring constant 130N/m . The spring is stretched 15cm from its equilibrium length.
What is the acceleration of the sled?
What is the resulting compressional force on the Earth. what is the acceleration of a rock at top of its trajectory when it has been thrown straight upward.
A horizontal wire of length 0.50 m, carrying a current of 6.7 A, is placed in a uniform external magnetic field. When the wire is horizontal, Determine the magnitude of the external magnetic field
A battery with an emf of 12.0 V shows a terminal voltage of 10.9V when operating in a circuit with two lightbulbs, What is the battery's internal resistance
A rescue plane flies horizontally at a constant speed searching for a disabled boat, If it takes the sound 2.10 s to reach the plane, determine the speed of the plane and What is its altitude
A hot dog cooker heats hot dogs by connecting them to 120 V household electricity. A typical hot dog has a mass of 50g and a resistance of 130ohm . How long will it take for the cooker to raise the temperature of the hot dog from 20c to 80c ? The ..
An uncharged capacitor and a resistor are connected in series to a source of emf. If emf = 6.00 V, C = 16.0 µF, and R = 100 ?, find the maximum charge on the capacitor
Assuming biological substances are 98 percent water, estimate the masses of a cell with a diameter of 0.7 µm, a human kidney, and a fly. Take a kidney to be roughly a sphere with a radius of 5.0 cm and a fly to be roughly a cylinder 4.90 mm long a..
The loaded cab of an elevator has a mass of 3.6 x 10^3 kg and moves 193m up the shaft in 20s at constant speed. At what average rate does the force from the cable do work on the cab.
Refer to Interactive Solution 19.25 to review one way in which this problem can be solved, What is the distance of closest approach
A 5 kg mass is attached to a 1-m long string. If the speed of the mass at the bottom of the swing is 3 m/s, what it the force in the string at this point
An astronaut in a satellite says she can just barely resolve two point sources on the Earth, 110km below. Assume λ=540nm, and the pupil diameter of the astronaut's eye to be 5.20mm.
When G was first measured by Henry Cavendish, newspapers of the time hailed his experiment as "weighing Earth experiment." And Why.
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