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Water is transported upward in a plant through xylem tissue, which consists of cells of 1 mm length and a diameter of 65 µm. The xylem cells are attached to each other to form a channel. To what maximum height can water rise in these xylem channels due to capillarity? For those interested: Confirm this result with a simple experiment: Cut and split the stem of a flower with white petals (e.g., a dahlia or a carnation) and place one half the stem in a glass with dilute red ink and the other half in a glass with dilute blue ink. After several hours the flower will be half red and half blue.
In the Bohr model, the electron is imagined to move in a circular orbit about a stationary proton. obtain what would be the corresponding orbital radius
A reversible isochore from an equilibrium state at P1= 1 bar, t1=100C to an equilibrium state at t2=300C followed by a adiabatic isentropic expansion to P3=1 bar, Find the thermal efficiency of the cycle
Assume instead the car hits a concrete abutment at full speed and is brought to a stop in 2.00 meter. Find the force exerted on the car
An unstable particle called the pion has a mean lifetime of 25 ns in its own rest frame. What is the mean lifetime of the pions as measured in the laboratory frame
If we model a blade as a point mass at the midpoint of the blade, what is the inward force necessary to provide each blade's centripetal acceleration
What fractional increase in tension of one wire will lead to the occurrence of 2 beats/s when both wires oscillate simultaneously.
when a force is moved to a point not along its line of action it can be replaced witha. a resultant force and moment.b.
A uranium nucleus with a charge of 92e can spontaneously decay into a thorium nucleus of charge 90e and an alpha particle of charge 2e. what is the initial potential energy
2 mol of a diatomic ideal gas expand adiabatically and quasi-statically. The initial temp of the gas is 300K, What is the final temp of the gas
A gray kangaroo can bound across a flat stretch of ground with each jump carrying it 11m from the takeoff point. what is its takeoff speed
a string has a linear density of 4.80 10-3 kgm and is under a tension of 345 n. the string is 1.5 m long is fixed at
You are making a diffraction grating that is required to separate the two spectral lines in the sodium D doublet, What is the minimum number of lines you should have on the grating
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