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Regarding the Earth and a cloud layer 650m above the Earth as the "plates" of a capacitor, calculate the capacitance. Assume the cloud layer has an area of 1 km2 and that the air between the cloud and the ground is pure anddry.
Assume charge builds up on the cloud and on the ground until auniform electric field of 2.0*106 N/C throughout the space between them makes the air break down and conduct electricity as a lightningbolt. What is the maximum charge the cloud can hold?
After falling from rest from a height of 35 m, a 0.45 kg ball rebounds upward, reaching a height of 25 m. If the contact between ball and ground lasted 1.8 ms, illustrate what average force was exerted on the ball?
The equation of a transverse wave traveling along a very long string is y = 5.0 sin (0.055 ?x + 6.0 ?t), where x and y are expressed in centimeters and t is in seconds. Determine the amplitude of propagation of the wave.
Find the magnetic field generated 5.0 cm above a single 2.5 cm long segment of copper wire carrying a current of 3.0 A. how much stronger is the actual field from the whole wire at this point
A block starts with a certain speed at the top of a frictionless inclined plane with an unknown angle to the horizontal. To calculate the time required for the block to reach the bottom of the plane
A bug starts at the origin of the xy coordinate system with an initial velocity of (2.2 + -0.4) m/s, What is the y position of the bug at t=2 seconds
If the free end of the string is held in place and the hoop is released from rest , calculate the angular speed of the rotating hoop after it has descended 0.750m
The diameter of a sphere is measured to be 6.94 in. Find the radius of the sphere in centimeters
A uniform horizontal wire with a linear mass density of 0.50 g/m carries a 1.8 A current. It is placed in a constant magnetic field with a strength of 4.00 x10-3 T. The field is horizontal and perpendicular to the wire. Neglect the magnetic field ..
the triangular coil of wire in the drawing is free to rotate about an axis that is attached along side ac. the current
A rocket of total mass 3180 KG is travelling in outer space with a velocity of 115 m/s. To alter its course by 35.0°, how much mass must be expelled
assuming that water has a density of exactly 1 g/cm3. Find the mass of one cubic meter of water in Kilograms
the top of a swimming pool is at ground level. if the pool is 2.28 m deep how far below ground level does the bottom of
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