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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.
A particle that has an 8.3-?C charge moves with a velocity of magnitude 4 × 105 m/s along the +x axis. Find the magnitude and direction of the magnetic field
An explorer is caught in a whiteout (in which the snowfall is so thick that the ground cannot be distinguished from the sky) while returning to base camp. How far (in km) must he now travel to reach base camp
A woman stands on a bathroom scale in a motionless elevator. When the elevator begins to move, Find the direction of the acceleration
Two objects of equal mass collide on a horizontal frictionless surface. What is the speed of the composite body (A + B) after the collision
The blood flow speed through an aorta with the radius 1.00 cm is .265 m/s. by how much would the blood flow speed increase
In one day, a 81-kg mountain climber ascends from the 1410-m level on a vertical cliff to the top at 2208 m. The next day, she descends from the top to the base of the cliff, which is at an elevation of 1215 m.
The rotor in a certain electric motor is a flat, rectangular coil with 88 turns of wire and dimensions 2.33 cm by 4.20 cm, What is the average power of the motor
A toy balloon is filled with helium gas He at 1 atm and 28 degree C If the volume of the balloon is 0.024m^3 , how many atoms does it contain
A sound wave propagates in air at 28°C with frequency 3.20 kHz. It passes through a region where the temperature gradually changes, and then it moves through air at 0°C. (a) What is the speed of the wave at 0°C? (b) What is the wavelength of the wave..
A 50 Newton horizontal force pushes a 10 kilogram mass sitting on a horizontal surface towards the right. What is the acceleration of the mass and its direction
Two newly discovered planets follow circular orbits around a star in a distant part of the galaxy. What is the orbital period of the faster planet
Calculate the magnitude and direction of net electric field. what is the efficiency of the engine under those conditions.
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