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Gayle runs at a speed of 3.40 m/s and dives on a sled, initially at rest on the top of a frictionless snow covered hill. After she has descended a vertical distance of 5.00 meter, her brother, who is initially at rest, hops on her back and together they continue down the hill. Find their speed at the bottom of the hill if the total vertical drop is 17.0 meter? Gayle's mass is 50.0 kilogram, the sled has a mass of 5.00 kilogram and her brother has a mass of 30.0 kilogram. m/s
in the produce section of a supermarket, five pears are placed on a spring scale. The placement of the pears stretches the spring and causes the dial to move from zero to a reading of 2.0kg. If the spring constant is 450 n/m, what is the displacement..
About 0.1eV is required to break a hydrogen bond in a protein molecule, what is the minimum frequecy that the radiation can have to accomplish that?
The drawing shows an A-shaped ladder. Both sides of the ladder areequal in length. This ladder is standing on a frictionlesshorizontal surface, and only the crossbar (which has a negligiblemass) of the “A” keeps the ladder from collapsing. Theladder ..
the electric potential at the center of a square is -3 v when a charge of -q is located at one of the squares corners.
A rope attached to a 20.0kg wood sled pulls the sled up a 20.0? snow-covered hill. at what value of the tension does the box slip
A power line carrying a sinusoidally varying current with frequency f = 60 Hz and peak value I0 = 55 kA runs at a height of 7.0 m across a farmer’s land (Fig. 29–41). The farmer constructs a vertically oriented 2.0-m-high 10-turnrectangular wire coil..
A mixture of ethyl alcohol (molecular mass = 46.1 u) and water (molecular mass = 18.0 u) contains one mole of molecules. What mass m of water does it contain
a 0.45 f parallel- plate capacitor is connected to a 6v battery. a how much is the charge on the plates? b what is the
What is the largest mass of an asteriod that COULD be split 2hours from the Earth and have its two halves miss the Earth on both by 800 kilometers, What would the radius of this spherical asteriod be
A thin film of polystyrene of refractive index 1.49 is used as anon reflecting coating for Fabulite (strontium titanate) of refractive index 2.409. Compute the minimum thickness of the film required
A transmission line that has a resistance of 0.5 omh per km of length is used to transmit 200 MW across 300 miles. what should be the transmission voltage
If the elastic limit of steel is 5.0 multiplied by 108 Pa, determine the minimum diameter a steel wire can have
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