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A traffic light, weighing 668N is hung from the center of acable of negligible weight that is stretched horizontally btween two poles that are 18.3m apart. The cable is observed a sag.610m. What is the tension in the cable.
A movie camera with a (single) lens of focal length 70 mm takes a picture of a person standing 29 m away. what is the height of the image in millimeters on the film
In the figure (Figure 1) the upper ball is released from rest, collides with the stationary lower ball, and sticks to it. The strings are both 48.0 long. The upper ball has mass is 1.80 and it is initially 10.0 higher than the lower ball, which ha..
A slug of mass 0.100 kg moving straight upward at 50.0 m/s collides with a 0.400 kg wooden block that is 20.0 cm long on a side, What is the loss of kinetic energy immediately before/after the hit
A 6.6cm diameter horizontal pipe gradually narrows to 5.6cm . When water flows through this pipe at a certain rate, What is the volume rate of flow
A uniform chain with a mass of 1.23 kg per meter of length is coiled on a table. One end is pulled upward at a constant rate of 0.523 m/s. Calculate the net force acting on the chain
A projectile is launched at some angle to the horizontal with some initial speed vi, and air resistance is negligible. What is its acceleration in the horizontal direction
Total internal reflection will occur when the refraction angle is 90' degrees or more. find the angle of incidence at which total interanl refraction in water will occur
A 20·kg fish swimming 1·m/s swallows a smaller 10·kg fish swimming toward it at a speed that brings both fish to a halt immediately after lunch. what is the velocity of the smaller fish just before lunch
The hydrogen alpha has a 658.28 nanometer wavelength. What is the shifted wavelenght of the Hydrogen alpha light emitted by stars in the Andromeda as viewd from Earth
Consider a theoretical head-on collision between two carts of equal mass and equal speed. What is the total momentum after the collision
When one person shouts at a football game, the sound intensity level at the center of the field is 61.1 dB. determine how many people are at the game
An object located 32.1 cm in front of a lens forms an image on a screen 9.5 cm behind the lens. determine the magnification of the object
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