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Estimate how many books can be shelved in a college library with 3500 of floor space. Assume 5 shelves high, having books on both sides, with corridors 1.5 wide. Assume books are about the size of this textbook, on average.
The threshold or cut-off frequency for sodium is 4,40x10 14 hz. Calculate the wave length of the electrons ejected from the surface
Two lenses, one converging with a focal length of 20.0cm and one diverging with a focal length of -12.0cm, Find the final image from the second lens. Follow the sign conventions
A hoop and a disk, both of 0.72- m radius and 4.0- kg mass, are released from the top of an inclined plane 2.5 m high and 8.9 m long. What is the speed of the hoop
the pressure change outside a house is +10.00mmHg. the roofhas two halves, each with the area of 61.045m^2, what is the magnitude and direction of the net force
a block mass 15.92kg supported by a vertical massless cable is initially at rest. The block is then pulled upward with a constant acceleration of 2.11m/s^2. what is the net force acting on the mass
in a particular region of earths atmosphere the electric field above earths surface has been measured to be 140 nc
A transparent rod 30.0 long is cut flat at one end and rounded to a hemispherical surface of radius 10.0 cm at the other end. What is its apparent depth when viewed from the curved end
a ball is thrown upwards with an initial velocity of 10 ms. find the time for its maximum height and also find its
the siren on an ambulance is emitting a sound whose frequency is 2637 hz. the speed of sound is 343 ms.a if the
A pulley wheel that is 22.0 cm indiameter has a 5.2 m long cord wrappedaround its periphery. How long does the unwinding take
A spherical hot air baloon is initially filled with air at 118 kPa and 18°C and has an initial diameter of 4 m. What is the rate of change of the balloon's diameter when it reaches the inflated diameter
The pulley system in Figure below is used to lift a 52-kg crate. Note that a chain connects the upper pulley to the ceiling, determine the tension in each chain
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