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A very long, thin straight line of charge has a constant charge density of 20pC/cm. An electron is initially charged 1.0mm away from the line and is moving away(perpendicular to line) with a speed of 10000km/s. How far does the electron go before it comes back?
A hot-air balloon has just lifted off and is rising at the constant rate of 2.2 m/s . Suddenly one of the passengers realizes she has left her camera on the ground.
A person eats a dessert that contains 230 kcal. The skin temperature of this individual is 36° C and that of her environment is 21° C. The emissivity of her skin is 0.85 and its surface area is 1.3 m2. How much time would it take for her to emit the ..
6.00g of nitrogen gas at 22.0 degree celsius and an initial pressure of 4.00atm undergo an isobaric expansion until the volume has tripled, What amount of heat energy is transferred from the gas as its pressure decreases
A platinum resistance thermometer has resistances of 190.0 when placed in a 0°C ice bath and 234.8 when immersed in a crucible containing a melting substance. What is the melting point of this substance?
When a satellite orbits the earth in a non-circular orbit which of the following is true.
The pulley is located so that the string makes a 45 degree angle with the beam. The beam is uniform, 5 meters long, and has weight. The professor stands 2 meters from the pivot point and has weight.
An ice skater has a moment of inertia of 2.3kg*m^2 , when his arms are tucked in close to his chest
A charged line of linear charge density ? has been bent into a circular arc of radius r that makes an angle ? with its center. (A). Find the magnitude of the electric field at the center of this arc. (Does your result make sense, what should it be..
Two people stand 3 m in front of large plane mirror and space 5m a part in dark room at what angle of incidence should one of them shine a flashlight on the mirror so that reflected beam directly strickes the other person.
A spring with spring constant 19 hangs from the ceiling. A ball is attached to the spring and allowed to come to rest. It is then pulled down 2.5 and released. The ball makes 33 oscillations in 15 seconds. What is its utmost speed.
A standing wave on a 1.70 m long horizontal string displays three loops when the string vibrates at 125 Hz. What is the function describing the standing wave
A 290 g piece of iron at 180 oC is placed in a 95 g aluminum calorimeter cup containing 250 g of glycerin at 10 oC. What is the specific heat of glycerin
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