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A 55 kg person riding a bike puts all her weight on each pedal when climbing a hill. The pedals rotate in a circle of radius 17 cm.
(a) What is the maximum torque she exerts?
(b) How could she exert more torque?
Two identical masses are in a hemispherical bowl of radius R. One block is sitting at the bottom and the other is at the top. how high will each of them rise
A beam of light is traveling in air and strikes a material. The angles of incidence and refraction are 58.8°, Obtain the speed of light in the material
If you add 700 kJ of heat to 700 g of water at 70 degrees C, how much water is left in the container? The latent heat of vaporization of water is 22.6*10^5 J/kg
A bungee jumper has a mass of 68 kg. If he jumps off a bridge that is 200. m high and uses a bungee cord that is 75 m long with a spring constant of 20. N/m
A compound microscope has objective and eyepiece focal lengths of 6.5mm and 2.2cm , respectively. what is the magnification of the instrument
a 45kg box is pulled across a horizontal floor. a rope attached to the box makes an angle of 30 degrees with the
A mass m1 = 1 kg rests on top of a mass m2 = 5 kg which is attached to a spring (k = 50 N/m), Determine the maximum amplitude of the motion such that the top mass does not slip
You are designing an underwater maintenance schedule for anoffshore oil rig. The divers work at a depth of 15 m and theseawater density is 1027 kg m^-3 . They are known to consume 130litres of air at the ambient temperature is 10 o C over the timetak..
A model rocket launches with an initial velocity of 6 m/s, at an angle of 88 degrees (with respect to the horizon). What is the maximum height attained by the rocket
In a science fiction story, a microscopic black hole is given anenormous positive charge by firing an un-neutralized ion driveexhaust (consisting of positively charged xenon ions) into it forsix months.
A potential difference is applied between the electrodes in a gas discharge tube. What is the current in the tube
The puck in figure has a mass of .135 kg. If its original distance from the center of rotation is 31.2 cm, Determine the work put on the puck
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