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A certain concrete will support a maximum compressive stress of 1.12 107 N/m2 before being crushed. A column of uniform width is to be made with this concrete. How tall can the column be if the stress in it at any point is not to exceed one fifth the maximum value? The weight density of the concrete is 2.36 104 N/m3.
Sound is passing perpendicularly through an open window whose dimensions are 1.1 m x 0.75 m. How much sound energy comes through the window in one hour
A billiard ball is moving in the x-direction at 30 cm/s and strikes another billiard ball moving in the y-direction at 40.0 cm/s. As a result of the collision, the first ball moves at 50.0 cm/s, and the second ball stops. In what final direction d..
A long thin rod of mass M = 2 kg and length L = 75 cm is free to rotate about its center as shown. Two identical masses (each of mass m = 0.853 kg) slide without friction along the rod. how fast is the rod rotating
A polytropic process for an ideal gas in one in which pressure and volume are related by = const., where n is a constant. It is a generalization of the special processes considered earlier. Thus n = 0 defines an isobaric process, n = cp/cv an adia..
A spherical mass on a rod of length L rotates rigidly about a fixed axis at the opposite end of the rod. What is the sphere's linear displacement
A car travels up a hill at a constant speed of 37 km/h and returns down the hill at a constant speed of 66 km/h. Calculate the average speed for the whole trip.
A 3.20 kg block of wood sits on a table. A 2.50 g bullet, fired horizontally at a speed of 600 m/s, goes completely through the block, emerging at the speed of 180m/s. What is the speed of the block immediately after the bullet exits.
When a battery is connected to a 89.0-? resistor, the current is 3.91 A. When the same battery is connected to a 417.0-? resistor, the current is 0.848 A. Find the emf supplied by the battery
A solid cylinder is mounted above the ground with its axis of rotation oriented horizontally. How much of the rope unwinds in this time interval
A mass m1 = 3.9 kg rests on a frictionless table and connected by a massless string over a massless pulley to another mass m2 = 5.7 kg which hangs freely from the string. How much work is done by gravity on the two block system
A luminous object 3.0 mm high is placed 200 mm from a convex mirror of radius of curvature 200 mm. Show that the (negative) image distance can be computed using a focal length of -100mm. Compute the image size?
A 200.0 m long thin wire carries a line charge density ! = 358.0 nC/m. Find the potential difference between points 5.0 m and 6.0 m on a perpendicular radius to the axis of the wire, provided the perpendicular radius is not near either end of the ..
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