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A rope is with each end is attached to a ceiling that is 8ft long. The ends are positioned 6ft apart. A second rope 3ft long is attached to the eight foot rope at 3 foot from one end and 4 foot from the other end. The second rope has a 80lbs object attached to its other end. What is the tension in the section of rope that three foot long?
Suppose a star with radius 8.39 multiply.gif 108 m has a peak wavelength of 686 nm in the spectrum of its emitted radiation. compute the surface temperature of the star
A wedge with mass rests on a frictionless horizontal table top. A block with mass is placed on the wedge, find the horizontal component of the acceleration of the wedge
Communications satellites are placed in a circular orbit where they stay over a fixed point on the equator. Find average speed of the satellite in geosynchronous orbit
If 100,000 MHz radar waves are incident on a plane coated with a polymer whose index of refraction is n = 1.50, how thick would you make the coating
A wheel is spinning clockwise at a 10 revolutions per second at t = 0. Due to friction in the bearings supporting the axle, the wheel slows down, losing 0.500 revolutions per second in angular velocity each second, until it comes to rest.
A projectile is fired with an initial speed of 37.8m/s at an angle of 44.7 degrees above the horizontal on a long flat firing range. Determine the total time in the air
Water flowing through a garden hose of diameter 2.79 cm fills a 24.0-L bucket in 1.30 min. What is the speed of the water leaving the end of the hose
A high-speed lifting mechanism supports a 875-kg object with a steel cable that is 33.0 m long and 4.00 cm2 in cross-sectional area. Determine the elongation of the cable
A diffraction grating with 330 {rm lines/mm} is 1.00 {rm m} in front of a screen. What is the wavelength of light whose first-order maxima will be 17.0 {rm cm} from the central maximum on the screen.
A 11.8-kg cylinder rolls without slipping on a rough surface. At an instant when its center of gravity has a speed of 10.8 m/s, find the translational kinetic energy of its center of gravity
A ray of light in air makes an angle of incidence of 30.2 as it enters an unknown liquid. the refracted ray in the fluid meassured to be 22.5. compute the index of refraction of the unknown liquid
Particle A of charge 5.00x10-4 C is at the origin, particle B of charge -5.00x10-4 C is at (3.00 m, 0) and particle C of charge 3.00x10-4 C is at (0, 2.00 m).
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