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The Earth can produce the downward electric field of 150 N/C around its surface. Assume this electric field is uniform through the atmosphere.
Estimate the net charge of the Earth.
The electric field at the height of 2.0 km from the surface of the Earth was measured 70 N/C. Estimate the volume charge density of atmosphere between that height to the ground.
A wall in a house contains a single window. The window consists of a single pane of glass whose area is 0.18 m2 and whose thickness is 7 mm. what is the percentage lost by the window
Demonstrate that gravitational energy is not extensive: show that the gravitational energy of a sphere of radius 'r' and uniform density varies with volume V^n and find the exponent 'n'.
The current in a coil drops from 3.4 A to 2.8 A in 0.51 s. If the average emf induced in the coil is 12 mV, what is the self-inductance of the coil
A rocket for use in deep space is to be capable of boosting a total load (payload plus the rocket frame and engine) of 3.15 metric tons to a speed of 10 000 m/s. How much fuel plus oxidizer is required
A wall in a house contains a single window. The window consists of a single pane of glass whose area is 0.11 m2 and whose thickness is 8 mm. Treat the wall as a slab of the insulating material Styrofoam whose area and thickness are 15 m2 and 0.10 ..
a 40 g block of of ice is cooled to -72 C and then is added to 650 g of water in an 80 g copper calorimeter at a temperature of 24C, determine the final temperature of the system consisting of the ice
What is the force between two balloons with a negative charge of 2.6 x 10-10C if the balloons are 10.0 cm apart?
Two identical pucks are placed on a collision course on an air table as shown. After the collision puck A has a final velocity of 5 cm per second, Determine the initial speeds of both pucks
a 5.0 kg object is supported by an aluminum wire of length 2.6m and diameter 2.2mm. How much will the wire stretch
A solenoid of radius 2.4 cm has 420 turns and a length of 16 cm. Find the rate at which current must change
An 81 kg person puts on a life jacket, jumps into the water, and floats. The jacket has a volume of 3.1 x 10-2 m3, What is the density of the life jacket
If we can treat the atom as a 'box' of size 20 nm for an electron, what wavelengths could this electron have
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