Constant velocity through a region of space
An electron moves with constant velocity through a region of space that is free of magnetic fields. Can one conclude that the electric field is zero in this region?
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It then increases its speed to 7v while traveling along the same circular path. By what factor has the centripetal acceleration of the particle changed? By what factor has the period of the particle changed?
How many times would you expect to be able to honk the horn with a 50% probability of not having any failures? What is the expected number of times you hit the horn before the fourth failure?
At 3.87 s after the explosion, the 2-kg fragment lands on the ground directly below the point of explosion. (a) Determine the velocity of the 0.97-kg fragment immediately after the explosion.
Calculate change in Gibbs free energy for the reaction CO(g) +1/2O2(g)-CO2(g) at 298.15 K. Calculate Change in Gibbs free energy reaction at 650 K assuming that enthalpy change in reaction is constant in the temperature interval of interest.
A fundamental law of motion states that the acceleration of an object is directly proportional to the resultant force exerted on the object and inversely proportional to its mass.
A rapid test for the presence in the blood of antibodies to HIV, the virus that causes AIDS, gives a positive result with probability about 0.004 when a person who is free of HIV antibodies is tested. A clinic tests 740 people who are all free of
The Apollo Lunar Module was used to make the transition from the spacecraft to the moon's surface and back. Consider a similar module for landing on the surface of Mars. Use conservation of mechanical energy to answer these questions.
When a survey calls residential telephone numbers at random, only 25% of the calls reach a live person. You watch the random dialing machine make 17 calls.
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