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A tree loses water to the air by the process of transpiration at the rate of 110 g/h. This water is replaced by the upward flow of sap through vessels in the trunk. If the trunk contains 2000 vessels, each 100 um in diameter, what is the upward speed of the sap in each vessel. The density of tree sap is 1040 kg/m3.
For tests using a ballistocardiograph, a patient lies on a horizontal platform that is supported on jets of air. determine the recoil velocity
Diffraction also occurs with sound waves. Consider 1400-Hz sound waves diffracted by a door that is 93 cm wide. What is the angle between the two first-order diffraction minima
A playground is on the flat roof of a city school, 5.4 m above the street below (see figure). The vertical wall of the building is h = 6.90 m high, forming a 1.5-m-high railing around the playground. A ball has fallen to the street below, and a pa..
A 2Kg wood block is attached to a .3 g bucket by a massless string rests on the durface of and inclined plan of 20 degrees. the coefficient of friction between the block and the inclined plane are static friction is equal to .4 and kinetic friction o..
A parallel-plate air capacitor is to store charge of magnitude 290pC on each plate when the potential difference between the plates is 36.0V, If the area of each plate is 6.80 cm2, what is the separation between the plates
A bicycle has wheels with a diameter of 0.67m. It accelerates uniformly and the rate of rotation of its wheels increases from 191 rpm to 260 rpm in a time of 21.70 s. Find the linear acceleration of the bicycle.
Two small metallic spheres, each of mass 0.20 g, are suspended as pendulums by light strings from a common point, what is the magnitude of the charge on each sphere
Assuming that the magnetic field of the earth has magnitude of 5x10^-5 T at the equator and is parallel to the surface of the earth and that the current in the wire flows toward east
A circular coil made up of 10 windings of wire has a circumfrence of 2 m. The coil is perpendicular to a magnetic field of strength 10 T. what is the change in magnetic flux through the coil
An old-fashioned single-play vinyl record rotates on a turntable at 58.0\({\rm rpm}\), What are the angular velocity in rad/s and period of the motion
Violet light and red light travel through air and strike a block of plastic at the same angle of incidence. find the index of refraction for violet light in plastic
An air-filled parallel-plate capacitor has plates of area2.40cm2separated by1.00mm. The capacitor is connected to a15.0-V battery. Find the value of its capacitance
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