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You've decided to protect your house by placing a 5.8-m -tall iron lightning rod next to the house. The top is sharpened to a point and the bottom is in good contact with the ground. From your research, you've learned that lightning bolts can carry up to 55kA of current and last up to 50 ?s .
A) How much charge is delivered by a lightning bolt with these parameters?
B) You don't want the potential difference between the top and bottom of the lightning rod to exceed 200V. What minimum diameter must the rod have?
How much work must be completed to accelerate a baton from rest to an angular speed of 7.79 rad/s about its center? Consider the baton to be a uniform rod of length 0.596m and mass 0.495kg.
A -3.4 nC charge is on the x-axis at x1 = -7 cm and a 4.2 nC charge is on the x-axis at x2 = 13cm. At what point or points on the y-axis is the electric potential zero
A certain gyroscope consists of uniform disk with a 50 cm radius mounted at the center of an axle that is 11 cm long and of negligible mass. what is the precession rate
2.00 mole of an ideal gas at 330k, 3.50 atm and 3.0L are isothermically compressed causing a change of entropy in the system equal to -25.0 J*K^-1. determine the final volume of the system
An eagle can determine that two light brown shrews sitting 1.0 cm apart on a pathway 125 m below her are in fact two shrews rather than a small rat. estimate the diameter of her pupil
When a large bone such as the femur is broken, the two pieces are often pulled out of alignment by the complicated combination of tension, how much mass m must be attached to the bottom pulley
A 75 g piece of ice at an initially unknown temperature is placed into a glass of 350 g of water sitting at room temperature when it is 75ºF in the room. The glass and ice come to thermal equilibrium at 4ºC.
A girl with a mass of 40 kg is swinging from a rope with a length of 3.2 m. What is the frequency of her swinging
Using the Equation of Hydrostatic Equilibrium, show that if we measure the pressure at the base of the atmosphere, Use the answer in the previous part to write an expression for the total mass of Earth's atmosphere
4.48 L of an ideal gas is initially at a temperature of 303oC. While the volume is kept constant, Determine the new temperature of the gas
In a football game a kicker attempts a field goal. The ball remains in contact with the kicker's foot for 0.0250 s, estimate vertical components of the launch velocity
(a) Determine the distance of the final image relative to the converging lens. (b) What is the height of the final image (including the proper algebraic sign)?
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