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A 50 newton horizontal force pushes a 10 kg mass sitting on a horizontal surface. Additionally the horizontal surface exerts a 25 newton frictional force on the mass. What is the acceleration of the mass.
If the rubber of the balloon itself has a mass of 2.00g and the balloon is filled with helium (density 0.166kg/m^3 ), calculate the net upward force (the "lift") that acts on it in air
A vertical tube 1.9 cm in diameter and open at the top contains 7.6 g of oil (density 0.82 g/cm^3 floating on 7.6g of water. Find the gauge pressure at the oil-water interface
a cement block accidentally falls from rest from the ledge of a 74.3 -m-high building. when the block is 10.6 m above
A diffraction grating with 610 lines per mm is illuminated with light of wavelength 520 nm. A very wide viewing screen is 2.1 m behind the grating. How many bright fringes can be seen on the screen
The drawing shows a graph of two waves traveling to the right at the same speed. (a) Using the data in the drawing, determine the wavelength of each wave. (b) The speed of the waves is 12 m/s; calculate the frequency of each one. (c) What is the maxi..
a 15 kg block is at rest on a level floor. a 415 g glob of putty is thrown at the block such that it travels
A uniform rod of length 0.940 m and mass 11.0 kg is balanced on a sharp edge at 0.670 m from the left end. Calculate the torque on the center of mass of the rod alone with respect to the pivot point
An orchestra is tuning its instruments using a tone at a frequency of 440 Hz. A man comes zipping by on a very quiet, electric scooter at a speed of 28 m/s. What tone does the man hear as he approaches the orchestra
The eukaryotic ribsome is an extremely large macromolecular complex that may be 25 nanometers in diameter or larger. Estimate the diffusion constant of a ribosome in m2/sec and Picometers2/sec.
question human lungs have evolved to breathe oxygen at a pressure as that in the atmosphere 0.21 atm. if a particular
A long horizontal wire carries 22.0A of current due north. What is the magnitude of the net magnetic field 25.0cm due west of the wire
A man at an organ concert can both hear a 30 Hertz sound wave and feel it as vibrations in the bench on which she is sitting. Evaluate what is the period
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