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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.
A uniform disk of mass 0.65 kg and radius6.4 cm is mounted in the center of a 10 cmaxle and spun at 600 rev/min. The axle isthen placed in a horizontal position with one end resting on apivot. The other end is given an initial horizontal velocity ..
Mechanical advantage is the ratio of the force required without the use of a machine (sometimes very simple machine) to that needed when using the machine.
What is the magnitude of the magnetic field that the spectrometer uses? In the operating room, anesthesiologists use mass spectrometers to monitor the respiratory gases of patients undergoing surgery
A spherical mirror is polished on both sides. When the convex side is utilized as a mirror, the magnification is +1/4. What is the magnification when the concave side is utilized as a mirror, the object remaining the same distance from the mirror?
find the radius of curvature of the vertical profile of the road at A. Using value of the curvature found, determine the force exerted on a 160-lb driver by the seat of his 3100-lb car as the car, traveling at a constant speed of 50 mi/h, passes t..
A photon energy 500KeV undergoes Compton scattering from the proton that is initially at rest. (a) what is the recoil Kinetic energy of the proton in eV?
The distance between the eyepiece and the objective lens in a certain compound microscope is 24.5 cm. compute the overall magnification of the microscope
A 1055 kilogram van, stopped at a traffic light, is hit directly in the rear by a 660 kilogram car traveling with a velocity of +1.95 m/s. Determine the final velocity of each vehicle
A 25 g glass tumbler contains 410 mL of water at 24°C. If four 20 g ice cubes each at a temperature of -3°C are dropped into the tumbler, what is the final temperature of the drink
Ultrasound is the name given to frequencies above the human range of hearing, which is about 20000 Hz. Waves above this frequency, can be used to penetrate the body and to produce images with reflecting from surfaces.
A 2.4 mm-diameter copper wire carries a 30 A current (uniform across its cross section). Determine the magnetic field at the surface of the wire
When a 14.4-V car battery delivers a current of 60.0 A, the power consumed on its internal resistance is 36.0 W, what is the internal resistance of the battery
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