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Problem:
A professor knows from past experience that the time for students to complete a quiz has an N(19, 3) distribution.
Requirement:
(i) If he allows 20 minutes for the quiz, what percent of the students will not complete the quiz?
(ii) Suppose that he wants to allow sufficient time so that 95% of the students will complete the quiz in the allotted time. How much time should he allow for the quiz?
A sprinter running the 100 m dash has a constant acceleration of 2.8 m/s2 for the first 4.1 seconds of the race, when he reaches his top speed, and then continues to run at that speed for the rest of the race. How long does it the sprinter to run t..
a stone is dropped from the roof of a high building. a second stone is dropped 2.50 s later. how far apart are the
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An airplane is sent on a rescue mission to help a stranded explorer near the South Pole. The plane cannot land, but instead drops a supply package of mass m = 58 kg while it is flying horizontally with a speed of vp = 116 m/s.
You have a spring and you measure its natural length to be 10.0 cm. When you hang the massless spring from the ceiling and attach a 4kg mass to it, What is the period of this motion in seconds
A 2.00 kg mass is located at (4.00 m, 0.00 m, 0.00 m) and a 4.00 kg mass is located at (0.00 m, 3.00 m, 0.00 m). If this system of masses rotated about the X-axis perpendicular to the Z-Y plane, then the moment of inertia of this system is ?
While at the county fair, you choose to ride the Ferris wheel. Having eaten too many elephant ears and candy apples, you obtain the motion somewhat unpleasant. Find what is the magnitude of your acceleration
The potential dissimilarity between the plates of a capacitor is 280 V. Midway among the plates, a proton and an electron are released. The electron is released from rest. The proton is projected perpendicularly toward the negative plate with an init..
A mass spectrometer,sketched below, is a device used to separate different ions. Suchions with a well-defined velocity vo enter through aslit into a region of uniform magnetic field B, where they follow asemicircular path until they strike the detec..
Two friends, Al and Jo, have a combined mass of 164kg. At the ice skating rink, they stand close together on skates, at rest and facing each other.
In a football game a kicker attempts a field goal. The ball remains in contact with the kicker's foot for 0.0894 s, estimate the vertical components of the launch velocity
Imagine two 5.0 g bags of protons, one at the earth's north pole and the other at the south pole. Calculate the gravitational attraction that each bag exerts on the other
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