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In the earth's atmosphere positive charges move toward the earth and negative charges moves away from it the total current is approximately 1800 Amp. The average value of the electric field responsible for this current near the surface of the earth is 100N/C.
Determine the resistivity of the air at the surface of the earth? The radius of the earth is 6.37 x 10^6 meter.
Every year the Earth travels about 109 kilometer as it orbits the Sun. Determine the Earth average speed?
in km/h
Assume the orbital of a lunched satellite around the earth is circular. Show that there is only one speed that a satellite can have if the satellite is to remain in an orbit with a fixed radius and it does not depend on the mass of the satellite.
A bicyclist starts from rest at the top of a hill and rolls down the hill without pedaling. what is the bicyclist's speed at the bottom of the hill
Big Ben, the Parliament tower clock in London, has an hour hand 2.70 m long with a mass of 300 kg, Calculate the total rotational kinetic energy of the two hands about the axis of rotation
A projectile is launched in the horizontal direction. It travels 2.050m horizontally while it falls .450m vertically, How long is the projectile in the air
What is the maximum load that could be suspended from a copper wire of length 1.0 m and radius 1.0 mm without breaking the wire? Copperhas an elastic limit of 2.0 x 10^8 Pa and a tensile strength of 4.0 x 10^8 Pa.
an airplane with a wingspan of 100m flies parallel to the earth's surface at a point where the downward component of the earth's magnetic field is 0.500 x 10^-4 T. what is the reading of the voltmeter
Current of 20 Amp is carried by a copper wire. A 0.5 meter straight section of this wire passes through a region of a uniform magnitude field 1.6 tesla strong. find the magnitude of the magnetic force exerted on the wire
Find the speed and acceleration of an electron in the first two Bohr orbits of the Li++ Ion. Also find the acceleration of an electron in the first two bohr orbital of the H atom.
A glass window with an area of 1.3m^2 is 4mm thick. What is the rate of heat of flow through the glass if one surface is at -5 degree celsius and the other is at 10.5 degree celsius
The displacement of an object moving under uniform acceleration is some function of time and the acceleration. Suppose we write this displacement as s=ka^mt^n, where k is the dimensional constant. Show by dimensional analysis that this expression ..
Five grams of nitorgen gas at an initial pressure of3.0atm and at a 20 degrees celcius undergo an iobaric expansionuntil the volume has tribled. What is the gas volume after the expansion?
A 600 turn solenoid, 25 cm long, has a diameter of 2.8 cm. A 10 turn coil is wound tightly around the center of the solenoid. If the current in the solenoid increases uniformly from 0 to 5.0 A in 0.48 s, what would be the induced emf magnitude in the..
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