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1. The approximate inside diameter of the aorta is 0.50 cm; that of a capillary is 10 µm. The approximate average blood flow speed is 1.0 m/s in the aorta and 1.0 cm/s in the capillaries. If all the blood in the aorta eventually flows through the capillaries, estimate the number of capillaries in the circulatory system.
2. Superman attempts to drink water through a very long vertical straw. With his great strength, he achieves maximum possible suction. The walls of the straw don't collapse.
(a) Find the maximum height through which he can lift the water?
(b) Still thirsty, the Man of Steel repeats his attempt on the Moon, which has no atmosphere. Find the difference between the water levels inside and outside the straw.
A physics TA pushes a 20.0-kg equipment cart at a constant velocity a distance of 20.0 m down the hall. Determine the work done by the force of friction acting on the cart
100 g ball of clay is thrown horizontally with a speed of 13m/s toward a 900g block resting on a frictionless surface. It hits the block and sticks. The clay exerts a constant force on the block during the 7 ms it takes the clay to come to rest re..
A broken spaceship is located 10 km above the center of a large circular thin sheet of unknown dust. The sheet has a radius of 106km and a density of 71011kg=m2. The spaceship and the dust attract each other due to the gravitational force.
A cube of metal has a volume of 2.00 cm3 and a mass of 6.00 g when at rest on Earth. what is its density as measured by a stationary observer
Block 1 is stacked on top of block 2, with a rope connecting them to each other over apulley, as shown below. Blocks 1 and 2 have masses of 1 and 2 kg, respectively, while the pulley has amass of 4 kg and radius of 10 cm (it is made of deplete..
When the temperature of a coin is raised by 85.4 C°, the coin's diameter increases by 3.08 x 10-5 m. find the coefficient of linear expansion
Bob can see the drai at the bottom center of a water filled pol (n=1.33) that is 3.6 m wide by light emerging 18 degrees above the horizontal
how much energy is stored in the flywheel at the end of 20 seconds?
A 100 g aluminum calorimeter contains 250 g of water. The two substances are in thermal equilibrium at 10°C. Two metallic blocks are placed in the water. Determine the specific heat of the unknown second sample
Eight 60 kg skaters join hands and skate down an ice rink at4.6m/s. Side by side; they form a line 12 m long. The skater at one end stops suddenly, and the line proceeds to rotate strictly about that skater.
Take a spring and cut it in half. What can you say about the spring constant of the smaller springs relative to the original one? Explain
A fan running on HIGH is switched to LOW and slows down to 83.5rad/s in 1.75s due to a deceleration of 42.0 rad/s/s. Calculate the HIGH speed of the fan
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