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a middle-aged man starts to wear eyeglasses with lenses of20 d that allow him to read a book held as close as 25
an ideal gas at 145 degc and a pressure of 110 x 105pa occupies a volume of 417 m3a how many moles of gas are presentb
a block m1is resting on a frictionless horizontal surface this blockis connected to a block m2 by a string over
a microwave oven is powered by an electron tube called amagnetron that generates electromagnetic waves of frequency215
a 21 kg mass is attached to a 04 m long massless string andswings as a pendulum if the maximum angle achieved by the
a cord 15m long has a mass of 300 grams ifthe tension were provided by a 25 kg mass how long would the cord be to
a simple pendulum has a mass of 0250kg and a length of 400 m it is displacedthrough an angle of 110deg and then
the flywheel of a steam engine runs with a constantangular speed of 156 revmin when steam is shut off the friction of
a seconds pendulum is one that moves through itequilibrium position once each second the period of the pendulumis 2000
a rock is thrown from 500-m-high cliff with an initial velocity of 70 ms at an angle of 530 degrees above the
two identical cylindrical vessels with their bases at the samelevel each contain a liquid of density 115 gcm3 thearea
a plane mirror is located at the origin a converging lenswith focal length 500 m is located at x 10 m an object
50kg ball tied to the end of a 13m light cord is revolvedin a horizontal plane with the cord making a 30 degree angle
two capacitors are identical except that one is empty and theother is filled with a dielectric kappa 440 the empty
objects with masses of 245 kg and a545 kg are separated by 0490 ma find the net gravitational force exerted by these
an empty coffee mug isaccidentally pushed horizontally off the shelf of your kitchencupboard the mug was 136 m off the
two force act on a 50kg object sitting on a frictionless horizontal surface one force is 30 n in the x direction and
a 200kg shell is fired from a gun with an initial velocity of200metersecond the angle of elevation of the gun is450a
an 3kg body is fastened to a weightless rod 3meters long to form apendulum what is the increase in the potential energy
a helium-neon laser of the type often found in physicslaboratories has a beam power of 700 mw at a wavelength of 633
the intake in figure 14-44 has cross-sectional area of075 m2 and water flow at040 ms at the outlet distanced 180 m
elastic conducting material an elastic conductingmaterial is stretched into a circular loop of 19 cm radius it is
the brightest star in the night skyis sirius which is at a distance of 830times1016 mwhen we look at this star how far
an object is placed 240 cm to the left of a diverging lensf -589 cm a concave mirror f 168 cm isplaced 367 cm to the
a boeling mass m and radius r is thrown so that theinstant it touches the floor it is moving horizontally with