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The electron gun in a color TV accelerates the electrons through about 25,000 Volts. Estimate the force on such an electron due to the magnetic field of the earth. Hint: The Earth's magnetic field in Virginia has a magnitude of about 5.5 X 10-5 T.
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Question: One type of BB gun uses a spring-driven plunger to blow the BB from its barrel. (a) Calculate the force constant of its plunger's spring if you must compress it 0.130 m to drive the 0.0580-kg plunger to a top s ...
Three people are fighting over a book. The mass of the book is m=9.18kg. Each person exerts a force on the book, F. The angle between the first person and the second person's force is 125.9 degrees. If the first person i ...
Question: Six artificial satellites complete one circular orbit around a space station in the same amount of time. Each satellite has mass m and radius of orbit L. The satellites fire rockets that provide the force neede ...
Question: The radius of the earth's orbit around the sun (assumed to be circular) is 1.5*10^8 km , and the earth travels around this orbit in 365 days. a) What is the magnitude of the orbital velocity of the earth in m/s ...
Question: Small birds can migrate over long distances without feeding, storing energy mostly as fat rather than carbohydrate. (Figure 1) Fat is a good form of energy storage because it provides the most energy per unit m ...
A puck is moving on an air hockey table. Relative to an x, y coordinate system at time t = 0 s, the x components of the puck's initial velocity and acceleration are v0x = +7.8 m/s and ax = +5.3 m/s2. The y components of ...
Question: In this problem you will derive two different formulas for the power delivered to a resistor. What is the power P supplied to a resistor whose resistance is R when it is known that it has a voltage V across it? ...
Question: A simple pendulum consisting of a bob of mass attached to a string of length swings with a period . a) If the bob's mass is doubled, approximately what will the pendulum's new period be? b) If the pendulum is b ...
Question: At what speed does a ball hit the ground if you toss a 120 g ball straight up to just touch the 12-m-high roof of the gymnasium if you release the ball 1.5 m above the ground? Solve this problem using energy. T ...
Question: Three identical very dense masses of 5200kg each are placed on the xaxis. One mass is at x1 = -110cm , one is at the origin, and one is at x2 = 310cm . What is the magnitude of the net gravitational force Fgrav ...
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