Physics, 27.07.2019 18:40 ethanmatthews2336
What is the minimal mass of helium (density 0.18 kg/m3) needed to lift a balloon carrying two people in a basket, if the total mass of people, basket, and balloon (but not gas) is 300 kg ? the density of the air is 1.2 kg/m3?
Answers: 1
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A100 kg running back runs at 5m/s into a stationary linebacker. it takes 0.5 for the running back to be completely stopped
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Light from a sodium lamp passes through a diffraction grating that has 1000 slits per millimeter. the interference pattern is viewed on a screen 1.000 m behind the grating. the first (m = 1) two bright yellow fringes that are visible are 0.7288 m and 0.7300 m from the central maximum. what are the wavelengths of these two fringes?
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What efficiency of a car's engine when heat input is 200,000 joules and waste heat is 150,000 joules? a. 75% b. 35% c. 25% d. 85%
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What is the minimal mass of helium (density 0.18 kg/m3) needed to lift a balloon carrying two people...
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