Physics, 17.09.2019 20:00 terrickaimani
Consider an ordinary, helium-fi lled party balloon with a volume of 2.2 ft 3 . the lifting force on the balloon due to the outside air is the net resultant of the pressure distribution exerted on the exterior surface of the balloon. using this fact, we can derive archimedesâ principle, namely that the upward force on the balloon is equal to the weight of the air displaced by the balloon. assuming that the balloon is at sea level, where the air density is 0.002377 slug/ft 3 , calculate the maximum weight that can be lifted by the balloon. note: the molecular weight of air is 28.8 and that of helium is
Answers: 1
Physics, 22.06.2019 03:50
The intensity of a polarized electromagnetic wave is 12 w/m^2. part a) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=0â with the plane of polarization? part b) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=30â with the plane of polarization? part c) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=45â with the plane of polarization? part d) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=60â with the plane of polarization? part e) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=90â with the plane of polarization?
Answers: 1
Physics, 22.06.2019 04:30
Afeather of mass 0.001 kg falls from a height of 2 m. under realistic conditions, it experiences air resistance. based on what you know about friction, what can you say about the kinetic energy of the feather as it reaches the ground? acceleration due to gravity is g = 9.8 m/s2. a. ke < 0.0196 j b. ke = 00196 j c. je = 0 j d. ke > 0.0196 j
Answers: 1
Physics, 22.06.2019 11:00
A0.580-kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. the velocity of the rock is 4.50 m/s. what is the centripetal force acting on the rock? 15.5 n 5.22 n 69.8 n 23.5 n
Answers: 3
Physics, 23.06.2019 02:00
Ice at 0.0âc has a density of 917 kg/m3. a 3.00 cm3 ice cube is gently released inside a small container filled with oil and is observed to be neutrally buoyant. what is the density of the oil?
Answers: 2
Consider an ordinary, helium-fi lled party balloon with a volume of 2.2 ft 3 . the lifting force on...
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