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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?
The roller coaster in the figure below starts with a velocity of16m/s.One of the riders is a small girl of mass 27kg.Find her apparent weight when the roller coaster is at locationsBandC. At these two locations, the track is circular, with the radi..
A projectile is launched from a 300 m high cliff at an angle of 30? with an initial velocity of 150 m/s. (g=9.8m/s2). calculate the Direction of the velocity on impact
a spacecraft in an orbit about earth has speed 10000 ms at a perigee of 7010 km from earths center. what is the speed
Astronauts use a centrifuge to simulate the acceleration of a rocket launch. What is the astronaut's tangential acceleration during the first 16.0 s
A camera is equipped with a lens with a focal length of 23 cm. how far from the film should the lens be placed
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Illustrate what is the maximum height of each ball after the elastic collision? What are the coordinates of the CM of the two balls when the lighter ball was pulled up? Consider the heavier ball to be at the origin before the collision.
Find the range of an object fired from a height h and at an angle θ and find the angle of launch which maximizes the range as a function of height.
What is the maximum number of 6.00 ?F capacitors that can be connected in parallel with a 6.00 V battery while keeping the total charge stored within the capacitor array below 484 ?C? If the same number of 6.00 ?F capacitors are connected in series w..
A sinusoidal wave travels along a stretched string. A particle on the string has a maximum velocity of 1.40 and a maximum acceleration of 250 . Part A What is the frequency of the wave? Part B What is the amplitude of the wave?
How does any elementary particle interact with the EM-Force to get an electric charge? What interactions do they have with photons?
Calculate the change in temperature of 10^(-3) m^3 of lead undergoing a reversible and adiabatic compression from 1 to 1000 atms. The adiabatic compressibility of lead is assumed to be independent of pressure with a value of 2.2*10^-6 atm^-1.
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