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a 015 kg meter stick is balanced with the pivot point at the 18 cm mark a weight of 32n is hung from the shorter end
a converging lens has a focal length of 155 cm if it is placed 725 cm from an object at what distance from the lens
a 630 kg astronaut is ona spacewalk when the tether line to the shuttle breaks the astronaut is able to throw a 100 kg
a block of mass m is attached to a fixed wall by means of a spring whose force constant is k the block slides on an
a radar unit sends out 005 microsecond pulses of microwaves whose wavelength is 25 mm what is the frequency of these
at an outdoor market a bunch of bananas is set into oscillatory motion with an amplitude of 201368 cm on a spring with
a spherical balloon is made from a material whose mass is 257 kg the thickness of the material is negligible compared
a 745 n window washer is standing on a scaffold supported by a vertical rope at each end the scaffold weighs 123 n and
a nickel crystal is used as a diffraction grating for x-rays then the same crystal is used to diffract electrons if the
a bimetallic strip 68cm by 1cm by 001cm has aluminum alpha 23 x 10-6 1c on one side has steel alpha 12 x 10-6 1c on
a camber carriers her drinks in an ice chest made of styrofoam the chest is 40 cm x 45 cm x 70 cm and the walls and lid
a certain ideal gas has a value of constant y which is cpcv 43 what is the molar specific heat at constant
one of the most efficient engines built so far has the following characteristics combustion chamber temperature
a heat engine operating between 40 c and 380 c has an efficiency 60 of that of a carnot engine operating between the
a heat engine has an efficiency of 650 and receives 150 j of heat per cycle how much work does it perform in each
one mole of an ideal gas at 1 atm and 0 c is compressed isothermally from 50 l to 20 l during this process energy is
a volume of nitrogen gas has a density of 115 kgm3 and a pressure of 107 atm find the temperature of the gas and the
two wires are identical except that one is aluminum and one is gold the aluminum wire has a resistance of 018 what is
a 10-m plank is being moved by rolling it over two cylindrical logs placed 2 m from either end of the plank as the
a horizontal 810-n merry-go-round of radius 160 m is started from rest by a constant horizontal force of 50 n applied
two identical point charges q 670 10-6 c are fixed at diagonally opposite corners of a square with sides of length
one particle has a mass of 200 10-3 kg and a charge of 7 microc a second particle has a mass of 500 10-3 kg and the
the combination of an applied force and a friction force produces a constant total torque of353n middot m on a wheel
one end of a nylon rope is tied to a stationary support at the top of a vertical mine shaft 800 m deep the rope is
an asteroid is headed towards a starbase to try and avoid a collision an explosive device is planted on the asteroid