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Q1. A rocket-powered sled starts from rest on a frozen lake that is 8 miles across. The sled then accelerates at +20 ft/s for 2 minutes. Then, the rockets are shut off and the sled coasts with a constant velocity of 2400 ft/s. If the total distance traveled by the sled is 432000 feet in a time of 3 minutes, find how long the sled was coasting.
Q2. In 1920, a thoroughbred racehorse named Man O'War ran the Preakness Stakes in 1 minute and 44 seconds. The Preakness is 9.5 furlongs in length (1furlong=201.168m). What was the acceleration (in SI units) of the horse if he reached a maximum speed of 50 miles per hour after the first two furlongs and slowed down at a constant rate of .45m/s2 after crossing the finish line?
An ion with charge q+ and radius 1*10^-10m is present in 1 M concentration in H2O. At equilibrium, what is the concentration in the membrane?
A 500.0 g mass at the end of a spring vibrates 3.0 times per second, What is the maximum velocity of this mass
An AC voltage source has an output of ?V = 163.0 sin(582t) Volts. Calculate the RMS voltage. What is the frequency of the source?
Two capacitors (C1=1.00 ?F and C2=2.00 ?F) are charged with Q1=3.00 ?C on the positive plate of capacitor 1 and Q2=3.00 ?C on the positive plate of capacitor 2, the total charge on the positive plate of capacitor 1
A horizontal wire is free to slide on the vertical rails of a conducting frame, what is the terminal speed of the wire
Two coils of wire are placed close together. Initially, a current of 2.27 A exists in one of the coils, What is the mutual inductance of the two-coil system
A lamp which is 12.0 cm tall is 286.8 cm in front of a converging lens which has a focal length of 77.5 cm. What is the image distance for this lamp
What is a galaxy rotation curve and describe the rotational curve for the Milky Way? How does the shape of the curve indicate the presence of dark matter?
What is the linear charge density together the arc.
A runner makes one lap around a track in 68.0s. The track is oval, has two straight 100m stretches with a semicircular bend (radius of 50m) at each end. What was the runner's total displacement for the lap
A beam of light passes through a polarizer and then an analyzer. find the angle between the axes of the polarizer and the analyzer
The peak current through an inductor is 11mA. What is the current if the emf frequency is doubled
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