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Sharla, weighing 140. lbf, absorbs 0.500 hp in her muscles while pedaling a 7.00 lbf bicycle at 25.0 mph into a 5.00 mph head wind in air at 70.0°F. Her frontal cross-section is 4.00 ft by 2.00 ft, and her drag coefficient is 0.500.
a. Compute her locomotion transport number.
b. Determine her most efficient velocity on the bicycle.
You are on a ferries wheel. You wonder about the motion of the ride. You calculate the radius of the big wheel to be 15 meter, Find your speed and magnitude of your acceleration
A conducting sphere 10cm in diameter is first charged and left isolated at a potential of 100volts. calculate the charge (in coulombs) on the sphere and on the capacitor after being connected
A turtle and a rabbit engage in a footraceover a distance of 4.00 km. What was his average speed before he stopped
Suppose there simple circuit: one battery, one resistor, andone capacitor all connected in series. Does any one specificcharged particle ever make a complete trip around the loop in sucha circuit?
After an impact involving a non-functioning satellite, a paint chip leaves the surface of the satellite at a velocity of +96m/s for 10 seconds.Then the object is hit by an asteroid and the force causes a 180 degree turn and the chip moves for 15 seco..
a block 20cm wide by 60 cm long balances (symetrically on a similar block which is fixed to the ground. What is the mass of the upper block
a microscope for viewing blood cells has an objective with a focal length of 0.50 cm and an eyepiece with a focal
A 52dB sound wave strikes an eardrum whose area is 5.0×10?5m^2. How much energy is received by the eardrum per second
a 20 kg box rests on a 35 deg ramp. the coefficients of static and kinetic friction are 0.75 and 0.45 respectively.
A thin converging lens of focal length 10.8 cm forms an image of an object placed 35.7 cm from the lens. Find the image distance. What is the magnification for an object distance of 35.7 cm?
The inner and outer surfaces of a cell membrane carry a negativeand positive charge, respectively. Because of these charges, apotential difference of about 0.065 Vexists across the membrane.
A large beach ball "weighs" 560g when there is no air inside. Fully inflated, it has a circumference of 252cm. A) Estimate the mass of the air inside the fully inflated beach ball. B) How much will the fully inflated beach ball "weigh"?
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