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A 5-kg mass hangs on a rope wrapped around a frictionless disk (I = 1/2 mr^2) pulley of mass 12 kg and radius 75.0 cm. What is the acceleration of the mass?
The reaction rate for the prepupal development of male Drosophila is temperature-dependent. Assuming that the reaction rate is exponential as in,reaction rate proportional to e?Ea/(kT). The activation energy for this development is then 2.81 10-19 J...
Water at a pressure of 13 atm, at street level, flows into a building at 3m/s through a 6 cm diameter pipe. The pipe tapers down to a 2 cm diameter by the top floor 50 m above. The density of water is 1,000 kg/m^3. Calculate the water pressure and ve..
A disk has radius R = 1.20 cm. Its surface charge density is 1.70 x 10-6 C/m2 from r = 0 to r = R/2 and 9.10 x 10-7 C/m2 from r = R/2 to r = R, What is the total charge (in C) on the disk
A mortar* crew is positioned near the top of a steep hill. Enemy forces are charging up the hill and it is necessary for the crew to spring into action. How fast will the shell be traveling when it hits the ground
Using a 683-nm wavelength laser, you form the diffraction pattern of a 0.113-mm wide slit on a screen. How far is the screen located from the slit
Gas in a container is at a pressure of 1.5 atm and a volume of 4 m3 . What is the work done by the gas if (a) it expands at constant pressure to twice its initial volume and (b) it is compressed at constant pressure to one quarter of its initial volu..
question a transformer has n1 350 turns and n2 2 000 turns. if the input voltage is ?v t 170 v cos wt what rms
Atmospheric air blows in toward the shore at a beach in Florida. It is assumed that a boundary layer begins to develop about 12 km from shore. If the wind speed averages 18 m=s, estimate the thickness of the boundary layer and the shear stress on ..
A ball is tossed in the air and released. It moves up, reverses direction, falls back down again, and is caught at the equal height it was released. find where does the gravitational potential energy of the ball have its maximum value
A 200MW laser pulse is focused with a lens to a diameter of 1.5 mu m. What is the laser beam's electric field amplitude at the focal point
a parallel-plate capacitor has plates separated by 0.76 mmpart a if the electric field between the plates has a
An electron ( mass = 9.11×10?31kg ) leaves one end of a TV picture tube with zero initial speed and travels in a straight line to the accelerating grid, If the accelerating force is constant, compute the acceleration of the electron
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