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Lightning occurs when there is a flow of electric charge (principally electrons) among the ground and a thundercloud. The maximum rate of charge in a lightning bolt is about 20,000 C/s; this lasts for 100 us or less.
a) How many electrons flow during this time? express answer using three important figures
b) How much charge flows between the ground and the cloud in this time? Express answer using three important figures.
Two particles are fixed to an x axis: particle 1 ofcharge -7.52 x 10-7 C is at the origin and particle 2 ofcharge +7.52 x 10-7 C is at x = 16.6 cm. Midwaybetween the particles, what is the magnitude of the net electricfield?
Normal atmospheric pressure is 1.013 x 105 Pa. The approach of a storm causes the height of a mercury barometer to drop by 20 mm from the normal height. What is the atmospheric pressure during the storm?
After a plant or animal dies, its 14C content decreases with a half-life of 5730 years. If an archaeologist finds an ancient firepit containing partially consumed firewood, what is the age of the ancient site
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
Your cup of coffee is too hot to drink when served at 95.0. What is the mass of an ice cube, taken from a -23.0 freezer, that will cool your coffee to a pleasant 59.0
A gas is to be expanded from initial state i to final state f along either path 1 or path 2 on a p-V diagram. What is the change in the internal energy of the gas along path 2
In a science fiction movie, a 100 g base ball travelling with a speed of 60 m/s and an electron travelling at a speed of 1.2 x 10^7 m/s, What is the momentum of the base ball
A motor rotating a gringing wheel which is 5m in radius, isrotating at 60 rev/min. What is the initial speed of the wheel
question1a war-wolf or trebuchet was a device used throughout the middle ages to throw rocks at castles and now
a metallic surface is illuminated with light of wavelength 400 nm if the work function for this metal is 2.487 eV what the velocity of the ejected electrons would be
a car can decelerate at -4.80 ms2 without skidding when coming to rest on a level road. what would be the magnitude of
If the pipe is open at one end only, how many harmonics are possible in the normal hearing range from 20 to 20000 Hz
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