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air hockey puck rides on air. the kinmatic visocity of air 1.4x10-5 m2/sec. the air flim 9 cm in thr diameter. The velocty of the puck is 6 ft/s. air density is 1.23 kg/m3. water densty 1000kg/m3. What is the frictional force acting on the puck by the air?
A small but measurable current of 8.4 x 10-10 A exists in a copper wire whose diameter is 2.9 mm. calculate the current density and electron drift speed
The bow of a destroyer undergoessimple harmonic vertical pitching motion with a period of 12.0 sand an amplitude of 2.5 m, What is the magnitude of the maximum acceleration
A bluray disc is 12cm in diameter. When you put it into the player it takes 30 seconds for the disc to accelerate to its playing speed; 1500 revolutions per minute. find number of revolutions the disc makes
In the film, "Enter the Dragon," the last scene involves a fight scence in a house of mirrors. Bruce Lee breaks the mirrors to avoid the problem of tracking the villain due to too many reflections. If that house of mirrors were all concave or conv..
A filamentary conductor is formed into an equilateral triangle with sides of length L carrying current I. Evaluate the magnetic field intensity at the center of the triangle
A parallel-plate capacitor in air has a plate separation of 1.49 cm and a plate area of 25.0 cm2. The plates are charged to a potential difference of 255 V and disconnected from the source.
A car is accelerating while its horn is blowing. Just after the car passes a stationary person, the person hears a frequency of 960 Hz. 17.5 seconds later, the frequency heard by the person has decreased to 927 Hz. When the car is stationary, its ..
A star in a distant galaxy is located at a distance of 20 kpc from the center of that galaxy. What is the total mass of the dark matter in this galaxy
Hypothetically, you are standing on the balcony of an apartment on the 10th level of a building and you throw a ball at some angle, Î, above the horizontal away from the building. Find the angle and the initial velocity of the ball
In a large centrifuge used for training pilots and astronauts, a small chamber is fixed at the end of a rigid arm that rotates in a horizontal circle. How long is the arm of the centrifuge
A 12.00kg runaway grocery cart runs into a spring with spring constant 260-N/m and compresses it by 65 cm. What was the speed of the cart just before it hit spring.
A satellite travels at about 8000m/s. What is the factor γ for this speed? As observed from the ground, by how much would a clock traveling at this speed differ from a ground based clock after one hour (as measured by the latter)? What is the percent..
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