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A bus makes a trip according to the position-time graph shown in the illustration. What is the average acceleration (in km/h2) of the bus for the entire 3.5-h period shown in the graph?
A 1200 N uniform boom is supported by a cable perpendicular to the boom, as in Figure P8.28. The boom is hinged at the bottom, and a 2000 N weight hangs from its top. Find out the tension in the supporting cable and the components of the reaction ..
You are in the neighborhood of a star (radius of 700,000 kilometers) which has emitted so many protons ("solar wind") during its life, that it now possesses a huge net negative charge of 6 x 10^6 C, What power must the engines of the probe use in o..
A drop of water on a countertop reflects light from a flower held 3.10 cm directly above it. What is the focal length of the water drop
A nail projects 25.0 mm horizontally outward from a wall. A 400 N picture is hung from the end of the nail and the nail deflects downward by 2.00 x 10^-5. what is the diameter of the nail
A solenoid of length 4.5 cm and diameter 0.85 cm is wound with 181 turns per cm. The current is decreasing at a rate of 36.6 A/s. What is the induced emf in one of the windings
LC oscillators have been used in circuits connected to loudspeakers to create some of the sounds of electronic music. which is in the audible range of frequencies
An old-fashioned vinyl record rotates on a turntable at 49rpm . What are the angular speed in rad/s and the period of the motion
A taut rope has a mass of 0.160 kg and a length of 3.40 m. What power must be supplied to the rope in order to generate sinusoidal waves having an amplitude of 0.120 m and a wavelength of 0.490 m and traveling with a speed of 31.5 m/s?
You pull downward with a force of 24.1 N on a rope that passes over a disk-shaped pulley of mass 1.35 kg and radius 0.0785 m. Calculate the tension in the rope on both sides of the pulley
when viewing an object with a magnifying glass whose focal length is 10 cm, What is the observed magnification
A surfer is riding a wave. Suppose she starts at the top of the wave with a speed of 1.87 m/s, how much work is done by the (non-conservative) force of the wave
A certain toaster has a heating element made of Nichrome resistance wire. What is the final temperature of the heating element
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