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Ten boxes, each 28.0 cm high and weighing215 N, initially are all side by side onthe floor. The boxes are lifted and placed in a vertical stack2.80 m high in a time interval of5.50 s. Compute the power necessary to stack the boxes.
a block 20cm wide by 60 cm long balances (symetrically on a similar block which is fixed to the ground. What is the mass of the upper block
charge of 5.00 x 10-9 c and a charge of -4.00 x 10-9 c are separated by a distance of 60.0 cm. find the position at
A 5 cm spring is suspended with a mass of 1.8557 g attached to it which extends the spring by 3.4967 cm. What are the charges of the beads
A pinhole camera is made from an 82cm -long box with a small hole in one end, how tall will the image of the person on the film be
What is the total energy of a 15-kg mass attached to a spring oscillating horizontally with an amplitude of 20 cm and an angular frequency of 32 rad/s
A certain dog whistle operates at 22.7 kHz, while another (brand X) operates at an unknown frequency. estimate the operating frequency of brand X
a pair of speakers seperated by .7m are driven by the same oscillator at a frequency of 690 hz. an observer originally
A solid sphere of mass 2.5 kg and a radius 0.15m starts from rest at the top of the a ramp inclined 15 degrees, What is the total kinetic energy of the sphere when it reaches the bottom of the ramp
An inventor claims that he has designed an engine which will produce a power output of 170kW while burning a unique fuel which releases 21,000kJ of heat in a minute. He states the upper and lower temperatures of the engine are 670K and 330K, respecti..
A strip of doped silicon 335 µm wide contains 9.4 1022 conduction electrons per cubic meter and an insignificant number of holes. What is the thickness of the strip
a capacitor has a capacitance of 7.38 . what amount of excess charge must be placed on each of its plates to make the
A plane heads due north while a crosswind blows west. The plane's resultant velocity is 620 km/h, 22° west of north. What is the velocity of the wind
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