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Q. The needle of a sewing machine moves up and down in the same hermonic motion its driving force comes from a rotating wheel that is powered by an electric motor. how do you suppose that theup-and-down needle comapres with the period of the rotating needle?
Q. Two circus performers, Jack and Jill, whose total mass is 120 kg, start a swing which is 5.0 m long such that initially the rope attached to their swing makes an angle of 36 degrees with the horizontal. At the bottom of the arc, Jack, whose mass is 65 kg, steps off. What is the maximum height of a landing ramp that Jill can reach as the swing continues?
Find the angle with respect to the ground
The distance between deer B and C is 92 m. What is distance between deer A and C.
The heels on a pair of women's shoes have radii of 0.42cm at the bottom. If 32 percent of the weight of a woman weighing 580N is supported by each heel, find the stress on each heel.
A recording engineer works in a soundproofed room that is 45 dB quieter than the outside. If the sound intensity in the room is 1.30 x10-10 W/m2, what is the intensity outside.
An 8,000 rocket is shot straight up from the Earth's surface with the initial speed of 800 m/s. How high does it go.
A space vehicle is coasting at a constant velocity of 28.5 m/s in the +y direction relative to a space station. The pilot of the vehicle fires a RCS (reaction control system) thruster, which causes it to accelerate at 0.523 m/s2 in the +x direction.
assume the current in the coaxial cable, see the figure , is not uniformly distributed, but instead the current density varies linearly with distance from the center: for the inner conductor and for the outer conductor. Each conductor still carrie..
A cube of ice is taken from the freezer at -8.0°C and placed in a 97 g aluminium calorimeter filled with 286 g of water at room temperature of 20°C. The final situation is observed to be all water at 19°C. What was the mass of the ice cube.
An electric field of 220000 N/C points due west at a certain spot. What is the magnitude of the force that acts on a charge of -10C at the spot.
Establish the initial volume of the gas . What is the magnitude of normal force that each brake pad applies to the rim.
Two wires are identical, except that one is aluminium and one is gold. The aluminium wire has a resistance of 0.18. What is resistance of the gold wire.
Two speakers, one directly behind the other, are each generating a 374-Hz sound wave. What is the smallest parting distance between the speakers that will generate destructive interference at a listener standing in front of them? Take the speed of so..
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