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Calculate the concentration (in moles/m^3) of oxygen in air (21%oxygen) assuming it acts as an ideal gas at 21oC. Oxygen diffusesto the inside of insects through tiny tubes called tracheae whichverage 2mm long and 2x10^-9 m^2 in cross-section. Estimate theaverage diffusion rate assuming the concentration of oxygen insideapproaches 0. Estimate the average time it takes for a molecule todiffuse in. What is the average speed for such a molecule. What is the rms speed for such a molecule?
A cat, also of weight 47.8 {rm N}, falls asleep on top of block A. If block B is now set into downward motion, what is its acceleration magnitude.
a beam of light from a monochromatic laser shines into a piece of glass. the glass has thickness l and index of
Monochromatic x rays are incident on a crystal for which the spacing of the atomic planes is 0.442. What is the wavelength of the x rays
A billiard ball moving at 5.30 m/s strikes a stationary ball of the same mass. Find the velocity (magnitude and direction) of the second ball after collision
As a civil engineering intern during one of your summers in college, you are asked to design a curved section of roadway that meets the following conditions: at what angle should the road be banked
a 6 kg grinding wheel of radius 0.2 m rotates at a constant rotational frequency of 4 rads when an object makes contact
The secondary coil of a step-up transformer provides the voltage that operates an electrostatic air filter. Find the power consumed by the air filter
A circular loop lieswith its plane normal to a magnetic field given by B=(2.500- 0.0400t) T, Calculate the radius of the loop
A 1248.0 g mass is on a horizontal surface with ?k = 0.36, and is in contact with a massless spring with a force constant of 790.0 N/m which is compressed, What is the velocity of the mass as it loses contact with the spring
a home receives 1.7 kw of electric power from a transformer on a nearby pole. the line from the substation to the
Find the electric field inside the cylinder
To start a lawn mower, you must pull on a rope wound around theperimeter of a flywheel. find the maximum angular speed reached by the flywheel
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