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Big Ben, the Parliament Building tower clock in London, has hour and minute hands with lengths of 2.70 m and 4.50 m and masses of 60.0 kg and 100 kg, respectively. Calculate the total angular momentum of these hands about the center point. Treat the hands as long, thin uniform rods.
A rifle with a barrel length of 56 fires an 8 bullet with a horizontal speed of 350. The bullet strikes a block of wood and penetrates to a depth of 14. (a) What resistive force (assumed to be constant) does the wood exert on the bullet? (b) How long..
A certain laser outputs pure blue light (photon energy 3.1 eV) with power 400 milliwatts (0.4watts). How many photons per second does this laser emit
The magnitude of the electrostatic force between two identical ions of mass 1.224×10-25 kg that are separated by a distance of 6.50 nm is 1.770×10-9 N. Calculate the electric field at the site of each ion
A concave mirror has a focal length of 52 cm. The image formed by this mirror is in front of the mirror and located 106 cm away from it. What is the object distance
A 667 kg satellite is in acircular orbit about the Earth at a height above the Earth equal tothe Earth's mean radius. Find the gravitational force acting on it
a how far from a 51.4 mm focal-length lens must an object be placed if its image is to be magnified 2.50 and be real?b
An object 1.0 cm high is placed on the optical axis of a 10 cm focal length lens, 18 cm from the lens. Find the location, size, and orientation of the image
A car moving with an initial speed v collides with a second stationary car that is one-third as massive. Find the final speed of the second car
a 35 kg boy sits atop a sphere of frictionless ice of radius r=2.0m. He begins to slide and eventually falls off. How far above the ground does he lose contact with the ice
A car travels at 90.0km/h for a distance of 500m. find the tangential speed of the perimeter of each tire
A capacitor is charged to a potential of 12.0V and is then connected to a voltmeter having an internal resistance of 3.10M(omega) . After a time of 4.10s the voltmeter reads 3.0V . What is the capacitance? What is the time constant of the circuit?
Frames k and k' are inertial frames. Frame k' is moving at a velocity of magnitude v realtive to frame k in the direction of the x-axis. there are rigid rods in each frame oriented along the direction of the relative velocity. someone in frame k meas..
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