The radius of the aorta is «10 mm and the blood flowing through it has a speed of about 300 mm/s. a capillary has a radius of about 4ˆ10´3 mm but there are literally billions of them. the average speed of blood through the capillaries is about 5ˆ10´4 m/s. (i) calculate the effective cross sectional area of the capillaries and (ii) the approximate number of capillaries.

Chemical energy is a form of energy. a. heat b. kinetic c. potential d. electromagnetic

Compare the horizontal displacement of the two balls as they travel to the ground. what do you observe?

Your starship, the aimless wanderer, lands on the mysterious planet mongo. as chief scientist-engineer, you make the following measurements: a 2.50-kg stone thrown upward from the ground at 14.0 m/s returns to the ground in 5.70 s ; the circumference of mongo at the equator is 2.20×10^5 km ; and there is no appreciable atmosphere on mongo. (a) the starship commander, captain confusion, asks for the following information: what is the mass of mongo? (b) if the aimless wanderer goes into a circular orbit 2.20×10^4 km above the surface of mongo, how many hours will it take the ship to complete one orbit? (c) an unmanned spacecraft is in a circular orbit around the moon, observing the lunar surface from an altitude of 44.0 km . to the dismay of scientists on earth, an electrical fault causes an on-board thruster to fire, decreasing the speed of the spacecraft by 23.0 m/s . if nothing is done to correct its orbit, with what speed (in km/h) will the spacecraft crash into the lunar surface?