How many penguins can stand on the ice
A rectangular block of ice 9 m on each side and 1.6 m thick floats in sea water. The density of the sea water is 1025 kg/m3. The density of ice is 917 kg/m3.
How many penguins of mass 22 kg can stand on the ice before they get their feet wet?
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A rectangular block of ice 9 m on each side and 1.6 m thick floats in sea water. The density of the sea water is 1025 kg/m3. The density of ice is 917 kg/m3. How many penguins of mass 22 kg can stand on the ice before they get their feet wet?
A stationary motion detector sends sound waves of 0.375 MHz toward a truck approaching at a speed of 35.0 m/s. The speed of sound in the air is 343 m/s. What is the frequency of the waves reflected back to the detector?
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A sample of a particular radioisotope is placed near a Geiger counter, Eight hours later the detector counts at a rate of 10 counts per minute. What is the half-life of the material?
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