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Question: Many years ago Scientific American published a letter about the aerodynamics of pollen spores. A photograph accompanied the letter showing a spore having a diameter of about 20µm and looking remarkably like a golf ball. The gist of the letter was that nature had discovered the principle of golf-ball aerodynamics millions of years before man. Explain why the letter writer's logic is faulty.
on a distant planet golf is just as popular as it is on earth. a golfer tees off and drives the ball 4.7 times as far
How many kilocalories are generated when the brakes are utilized to bring a 910 kg car to rest from a speed of 101 km/h? How long does it take a 768 W coffeepot to bring to a boil 0.57 L of water initially at 8.0°C? Suppose that the part of the pot w..
a 26.5 kg boy slides down a steep slide at a water park that is 10.9 m long and angled 75 degrees above the ground. what is the magnitude of the boys acceleration as he travels down the slide
A golf ball is shot from a tee, elevated 20.0 m above the green, what will be the speed of the golf ball just before it hits the green, 20.0 m below where it started
To prevent damage to floors (and to increase friction), a crutch will often have a rubber tip attached to its end. by what factor does the tip reduce the pressure exerted by the crutch
The potential difference between the plates of a leaky(meaning that charge leaks from one plate to the other) 2.0 uFcapacitor drops to one-fourth its initial value in 2.0s
A0.26-kg rock is thrown vertically upward from the top of a cliff that is 32 m high. When it hits the ground at the base of the cliff, the rock has a speed of 29 m/s.
An industrial furnace uses natural gas (assume 100% CH4) as a fuel. The natural gas is burned with 20% excess air, and is converted completely to CO2 and water.
A hydrogen atom is in its fifth excited state, with principalquantum number 6. etermine the maximum possible orbital angular momentum of the electron after emission
Coherent light from the laser pointer shown here shines through two slits. The slits are 0.100 mm apart, and each slit is 0.025 mm wide. Light from the slits lands on a screen 4.0 m away.
Water is contained in a closed, rigid, 0.25 m3 tank at an initial pressure of 5 bar and a quality of 60%. Determine the final mass of vapor in the tank
Calculate the wavelength of light in vacuum that has a frequency of 6.0 1011 Hz and What is its wavelength in water
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