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Oxygen in the Lungs: In the lungs, the respiratory membrane separates tiny sacs of air (pressure1.00x105Pa) from the blood in the capillaries. These sacs are called alveoli. The average radius of the alveoli is 0.125 mm, and the air inside contains 14% oxygen. Assuming that the air behaves as an ideal gas at 310 K, discover the number of oxygen molecules in one of these sacs.
Indicate the negative x direction by including a negative sign in the answer, but omit a sign for the positive x direction.
A 45.0 kg girl is standing on a 159 kg plank. The plank, originally at rest, isfree to slide on a frozen lake, which is a flat, friction less surface. What is her velocity relative to the surface of ice
A 5.1 foot-tall girl stands on level ground. The sun is 23 Degrees above the horizon. How long is her shadow
question a luminous object is 3.40m from a wall. you are to use a concave mirror to project an image of the object on
q1. shell fired from a cannon has a muzzle speed speed as it leaves the barrel of 800 fts. the barrel makes an angle
julio throws his 0.20kg football in the living room and knocksover his mothers 0.80 kg antique vase. how fast did julio throw the football
an ac generator consists of 6 turns of wire. each turn has an area of 0.040m2. the loop rotates in a uniform field
A proton accelerates from rest in a uniform electric field of 628 N/C. At some later time, its speed is 1.10106 m/s. What is its kinetic energy at the later time
Two Skaters collide and hold on to each other on a frictionless floor. find direction of the velocity of these skaters after the collision
A certain kind of glass has an index of refraction of1.650for blue light of wavelength430nm and an index of1.615for red light of wavelength690nm. compute the angle between the two beams inside the glass
Skid is going to attempt a field goal by kicking the football from a point 40 yards out from the goal. The ball must clear the cross bar that is 3m off of the ground. Skid kicks the ball with a velocity of 20m/s at an angle of 45 degrees.
A 2200 kg elevator is attached to a 1500 kg counterweight. What power must the motor supply to raise the elevator at 0.5 m/s
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