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Determine the power input for a motor necessary to lift 300 kg at a constant rate of 5 m/s. The efficiency of the motor is e = 0.65.
A thin spherical shell of mass 0.25 kg and radius 0.15 m is released from rest from the top of a 3.0-m high ramp. What would the linear speed be at the bottom
A 5 N force acts on a 0.4-kg object for 0.3 seconds. By how much does the object's momentum change
A tank holds a layer of oil, 1.58 m thick, which floats on a layer of syrup that is 0.66 m thick. Both liquids are clear and do not intermix. A ray, The index of refraction of the syrup is closest to:
two blocks connected by a rod going down a 30.0 degree slope, bigger mass 3.30kg is first and the smaller 1.65kg is following. calculate the common acceleration of the blocks
The red light emitted by a helium–neon laser has a wavelength of 632.8 nm. What is the frequency of the light waves?Hz
A 60 kg front seat passenger in a car moving initially with aspeed of 23 m/s (50 MPH) is brought to rest by an airr bag in a time of 0.4s. What is the impulse acting on the passenger
Magnetic field lines can be entirely confined within the core of a toroid, but not within a straight solenoid. Why?
A spherical metallic Christmas tree ornament has a diameter of 6.41 cm. If Saint Nicholas is by the fireplace, 1.37 m away, where will he see his reflection in the ornament
The distance between the first and fifth minima of a single-slitdiffraction pattern is 0.400 mm with the screen 35.0 cm away fromthe slit, Find the slitwidth
A coffee-maker contains a heating element that has a resistance of 34 ohms. What is the current in the heating element
A child is twirling a 0.012 kg ball on a string in a horizontal circle whose radius is .100 meters. The ball travels once around the circle in .500 seconds.
Calculate the reactions at the supports and draw the shear force(SF) diagram with the values marked at the turning points.
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