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A string oscillates according to the equation below. y = (0.30 cm) sin[(?/3 cm-1)x] cos[(20? s-1)t]
(a) What is the amplitude of the two waves (identical except for direction of travel) whose superposition gives this oscillation?
(b) What is the speed of these waves?
(c) What is the distance between nodes?
(d) What is the transverse speed of a particle of the string at the position x = 1.5 cm when t = 9/8 s?
Jill of the jungle swings on a vine 6.5 m long. What is the tension in the vine if Jill, whose mass is 61kg, is moving at 2.4 m/s when the vine is vertical
What is the magnitude of the torque exerted by the entire flagpole at the point of contact with the building.
An athlete at the gym holds a 1.8-kg steel ball in his hand. His arm is 74-cm long and has a mass of 4.00 kg. What is the magnitude of the torque about his muster if he holds his arm straight out, parallel to the floor.
A rectangular plate has a length of (20.4 0.2) cm and a width of (8.7 0.1) cm. Calculate the area of the plate
find the angular displacement of the propeller.
A photoflash unit makes a very bright light for a very short time. Discuss differences in the exposure of the film with and without a flash unit. Consider the f-stop and shutter speed in your deliberation.
An open container holds ice of mass 0.530 kg at a temperature of -15.7 Celsius . The mass of the container can be ignored. Heat is supplied to the container at the constant rate of 810J/minute .
Illustrate the security threats that An industry will face when it implements a wireless network. Suppose that the industry occupies the six middle floors
Isaac Newton, having convinced himself (erroneously as it turned out) that chromatic aberration was an inherent property of refracting telescopes, invented the reflecting telescope.
A movie camera has a converging lens with a focal length of 80.0 mm. What is the height of the image on the film
You hold a ruler that has a charge on its tip 6 cm above a small piece of tissue paper to see if it can be picked up. find the minimum charge required to pick up the tissue paper
suppose the speci?c heats of milk and coffee are the same as that of water.
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