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Before a lightning strike can occur, the breakdown limit for damp air must be reached. If this occurs for an electric field of 3.23 x 105 V/m, what is the maximum possible height above the Earth for the bottom of a thundercloud, which is at a potential 1.42 x 108 V below Earth's surface potential, if there is to be a lightning strike?
A small object is placed to the left of a convex lens and on the optical axis. What is the position of the image formed by the lens
A light ray is incident from air onto the surface of a very quiet lake. what is the index of refraction of the water
Explain how much waork has been done against gravity when the crate is raised a vertical distance of 2.19 m? The coefficient of friction is 0.316.
A turtle ambles leisurely–as turtles tend to do–when it moves from a location with position vector r1,x = 1.97 m and r1,y = -2.35 m in a lettuce garden to another location, with position vector r2,x = 3.15 m and r2,y = -4.15 m, where the lettuce a..
question a sphere of copper is subjected to 81.1 mpa of pressure. the copper has a bulk modulus of 130 gpa. by what
Two people hear a tornado siren, What is the intensity level (in dB) at the farther listener relative to the other listener
A train sounds its horn as it approaches an intersection. The horn can just be heard at a level of 54 dB by an observer 10 km away. What is the average power generated by the horn
current in a circuit falls from 5.0 a to 0.0 a in 0.1 s. if an average emf of 200 v induced give an estimate of the
An electron moving at 3.60 103 m/s in a 1.10 T magnetic field experiences a magnetic force of 1.40 10-16 N. What angle does the velocity of the electron make with the magnetic field? There are two answers between 0° and 180°. 1 ° (smaller value) 2 ° ..
An aircraft performs a maneuver called an aileron roll. During this maneuver, the plan turns like a screw as it maintains a straightflight path, but using its ailerons to set the wings in circularmotion.
A motorcycle has a constant speed of 24.0 m/s as it passes over the top of a hill whose radius of curvature is 131 m. The mass of the motorcycle and driver is 348 kg.
A speck of dust on a spinning DVD has a centripetal acceleration of 20 m/s^2. A) What is the acceleration of a different speck of dust that is twice as far from the center of the disk? B) What would be the acceleration of the first speck of dust if t..
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