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An interesting recent development is a growing awareness of bacteria. It's now realized that the total biomass of bacteria on earth far outweighs all animals, plants, and other complex living beings put together. A recent claim is that "there are 10 times as many bacterial cells in a typical human body as there are human cells." If we don't count blood and bone (about 20% of your mass) estimate the fraction of your mass that is bacterial and not "you".
The cannon on a battleship can fire a shell a maximum distance of 30.0 km. Calculate the initial velocity of the shell
In a car lift, compressed air with a gauge pressure of 4.0 × 10^5 Pa is used to raise a piston with a circular cross-sectional area. what is the maximum mass that can be raised using this piston
A particle falls in Earth's gravity. The force of air resistance is F = ??v v(bold) where v(bold) is the velocity, v is the speed, Suppose the initial velocity is 0. How far has the object fallen when the speed is one-half the terminal speed
Calculate the gravitational and the Coulomb force for a Hydrogen atom with the electron and proton separated by 5x10-11m and Compute the ratio Fcoul/Fgrav. coulumb force/gravitational force
A disk between vertebrae in the spine is subjected to a shearing force of 575 N. Find its shear deformation, taking it to have a shear modulus of 1.40 × 109 N/m2
suppose the motion in problem 3.7 is taking place in a viscous medium. in 16 seconds the amplitude reduces to half of
In the semiconductor industry, an insulating layer can be built onto silicon devices by oxidizing the silicon to form silica, SiO2, Write down a balanced equation for the reaction between silica and HF.
During one cycle a heat engine transfers 4 X 103 J of heat from a hot reservoir and exhausts 2.4 X 103 J to a cold reservoir. How much work is performed by this engine in one cycle
A retired bank president can easily read the fine print of thefinancial page when the newspaper is held no closer than at arm'slength, What should be the focal length of an eye glass lens
A car is driving directly north on the freeway at a speed of 117 km/h and a truck is leaving the freeway driving 76 km/h in a direction that is 40° west of north
A 5.4 m-long rod of (constant diameter 4.6 mm) is made of 2.0 m of copper and the remainder of aluminum, What is the temperature at the interface between the copper and aluminum
A solid ball encounters a 0.760 m vertical rise on the way back to the ball rack. Find the translational speed at the top
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