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A high fountain of water is located at the center of a circular pool as shown in the figure below. Not wishing to get his feet wet, a student walks around the pool and measures its circumference to be 29.0 m. Next, the student stands at the edge of the pool and uses a protractor to gauge the angle of elevation at the bottom of the fountain to be 55.0°. How high is the fountain?
A 40 kg girl and an 8.4 kg sled are on the fictionless ice ofa frozen lake, 15m apart but connected by a rope of negligiblemass. How far from the girl's initial position do they meet
What is the work done by a car's braking system when it slows the 1500-kg car from an initial speed of 96 km/h down to 56 km/h in a distance of 55 m
The rest energy of an electron is 0.511 MeV. The rest energy of a proton is 938 MeV. Assume both particles have kinetic energies of 1.70 MeV. By how much does the speed of the electron exceed that of the proton
In unit vector notation, find the velocity of the train with respect to the car and find the angel between this velocity and the line of sight to the train
A uniform electric field of magnitude 415 N/C pointing in the positive x-direction acts on an electron, which is initially at rest. The electron has moved 3.00 cm. What is the work done by the field on the electron
A man is running at speed c (much less than the speed of light) to catch a bus already at a stop. At t=0, while he is a distance b from the door to the bus, the bus starts moving with the positive acceleration a.
A distant galaxy is moving away from the earth with a speed that results in each wave- length received on the earth being shifted, Find the speed of the galaxy relative to the earth
The total charge that anautomobile battery can supply without being recharged is given interms of Ampere-hours. A typical 12-V battery has a rating of 77 A· h . Suppose you forget to turn off the headlights in yourparked automobile.
A hiker starts at his camp and moves the following distances while exploring his surroundings: 55.0 m north, 2.75x10^2 m east, Find his resultant displacement from camp
Calculate the diameter of a 1.51 cm long tungsten filament in a lightbulb if its resistance is 0.507 ?
during their experiment the lab partners conducted several trials to determine the value of acceleration of a coffee
A 56.7 cm long straight section of wire is located entirely inside a uniform magnetic field of |B| = 0.210 T. The wire is perpendicular to the direction of the magnetic field. When a current runs during the wire a magnetic force of|F| = 0.950 N acts ..
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