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a painter weighingnbsp900 nnbspstands on a massless planknbsp5 mnbsplong that is supported at each end by a stepladder
find the change in mass in grams required for the energy released by a 120-kt bomb if 42x10 12 12 j is released per
a pitching machine shoots a baseball with a speed of 70 mph and a rotation of 300 rpm clockwise knowing there is no
a large piano that weighs 4100 n is to be moved into a house by way of an opening that is 15 m from the ground if the
a double-slit experiment uses coherent light of wavelength 633nm with a slit separation of 0100mm and a screen placed
410 j of heat is conducted from a reservoir at 395 k to one at 310 ka what is the change in entropy of the universe jkb
a tennis ball has a mass of 57 grams and can easily be served at 80 mileshrsuppose several machines launch a rate of
what general conclusion can be made regarding the location of the chz for different types of
for the circuit shown in the figure r1 4 omega r2 7 omega r3 5 omega r4 2 omega r5 3 omega and the potential
a battery with an emf of 105 v and internal resistance of 101 omega carries a positive current of 0520 a from its
a youngs double-slit experiment contains a light source of two different wavelengths 6328 nm and 515 nm if we assume
a person lowers a bucket into a well by turning the hand crank as the drawing illustrates the crank handle moves with a
a fully loaded boeing 767 jetliner has a mass of 180000 kg starting from rest it accelerated down the runway and
a person of mass 75 kg stands at the center of a carousel of radius 3 m and moment of inertia 920 kgm2 the platform is
a 70 kg toy car can move along an x axis the figure gives fx of the force acting on the car which begins at rest at
the magnetic field 2 cm away from a long straight wire is 60 microteslas what is the current in the wire in
a simple harmonic oscillator consists of a block of mass 140 kg attached to a spring of spring constant 100 nm when t
40 mw of horizontally polarized light is incident on a polarizing filter whose axis is 30 degree from the vertical that
quantitative problemjupiters moon io looses about a ton 1000 kg of sulfur dioxide per second to jupiters magnetosphere
in a physics lab experiment a compressed spring launches a 20 g metal ball at a 35 angle compressing the spring 17 cm
a horizontal laser beam of wavelength 6328 nm has a circular cross section 200 mm in diameter a rectangular aperture is
the mean free path of nitrogen molecules at 82degc and 142 atm is 0292 x 10-5 cm at this temperature and pressure there
planners of an experiment are evaluating the design of a sphere of radiusrthat is to be filled with helium 0degc 1 atm
calculate the period of oscillation of a one meter long pendulum on the poles where g 98 msec2 calculate the period
a mass on a string of unknown length oscillates as a pendulum with a period of 34 s parts a to d are independent