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An 80 kg skydiver falls through air with a density of 1.15 kg/m3 . Assume that his drag coefficient is C=0.57. When he falls in the spread-eagle position his body presents an area A1=0.94 m2 to the wind, whereas when he dives head first, with arms close to the body and legs together his area is reduced to A2=0.21 m2 . What are the terminal speeds in both cases?
A spherical capacitor contains a charge of 3.20 nC when connected to a potential difference of 220 V, Calculate the radius of the inner sphere
Heather and Mathew walked eastward with a speed of 9.8 m/s. If it takes those 34 min. to walk to the store, how far have they walked.
A 5.01E+4 kg space probe is traveling at a speed of 12600 m/s through deep space. Retrorockets are fired along the line of motion to reduce the probe's speed, What is the final speed of the probe?
On another planet the simple pendulum consisting of a 0.154 kg mass suspended on a 1.20 m long string has a period of 3.860 seconds. What is acceleration on this planet.
A person scuffing her feet on a wool rug on a dry day accumulates a net charge of -95?C. By how much does her mass increase
A proton is shot at 5 × 107 m/s toward a gold atom, with a mass 197 times that of the proton, What is the recoil speed of the gold nucleus
An 8g bullet is fired at a speed of 216 m/s into a 190 g block that is initially at rest at the edge of a table of 1m height. The bullet fully embeds itself in the block before the bullet-block system launches off the table. How far in the x-direc..
Compute the value of Ra in terms of R1 and R2. how much energy must be added to a 2-kilogram pile of it to increase its temperature from 40*c to 50*c.
A 51.0-kg woman wearing high-heeled shoes is invited into a home in which the kitchen has vinyl floor covering. If the woman balances on one heel, what pressure does she exert on the floor
A spiral staircase winds up to the top of a tower in an old castle. To measure the height of the tower, a rope is attached to the top of the tower, What is the height of the tower
Ideally, when a thermometer is used to measure the temperature of an object, the temperature of the object itself should not change. What was the temperature of the water before the insertion of the thermometer
What volume of water at 0°C can a freezer make into ice cubes in 1.4 hours, if the coefficient of performance of the cooling unit is 8.0 and the power input is 1 kilowatt.
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