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A ladder of uniform density, length 4m and mass 20kg, makes an angle = 65 degrees with the horizontal and its upper end rests against a wall. The two ends of the ladder each of have a coefficient of static friction s = :7 between them and the wall or floor respectively. A man wishes to climb the ladder to a point 3m up the ladder's length. What is the maximum mass that he can have such that the ladder will not slip when he reaches this point?
The trainer releases the ball at the horizontal distance of 4.72m away and the vertical distance of 4.61m above the water. At what height does the dolphin catch the ball
Calculate the diameter of a 1.51 cm long tungsten filament in a lightbulb if its resistance is 0.507 ?
A 50 kg person performs a maximum vertical jump with an intial velocity of 2m/s. What is the performer's maximum kinetic energy during the jump
Pierre Curie discovered through experiment that the magnetization of a paramagnetic material is directly proportional to the strength of an external magnetic field and inversely proportional to the temperature in degrees Kelvin
Consider a chain with length 0.9 m and mass per unit length 0.6 kg/m. Suppose it is initially suspended above a table so that the lower, What is the force when one-half of the chain lies on the table
A light beam of wavelength 500 nm in air hits transparent material. When the angle of refraction is 40.0 degrees, Find the polarizing angle
A gasoline engine absorbs 1900 J of heat and performs 530.0 J of mechanical work in each cycle. What is the efficiency of the engine
A bicycle rim has a diameter of 0.65 m and a moment of inertia, measured about its center, of 0.29kg?m2. What is the mass of the rim
A speaker generating a tone at 285 Hz is moving towards a stationary observer with a speed of 35 m/s
Aluminum wiring rated at 30. A maximum current is to be installed in a home. For safety reasons, it should produce no more heat than 15 watt per meter of length. how thick diameter does the wire have to be
A playground Merry-Go-Round has a mass of 291 kg which can be viewed as being uniformly distributed over a disk of radius 2.4 m. What is the new rotation rate assuming the child remains at the rim
A horizontal wire of length 0.11 m, carrying a current of 3.0 A, is placed in a uniform external magnetic field. Determine the magnitude of the external magnetic field
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