The mass of helium gas in a balloon is .
the weight of the gas minus the balloon
the amount o...
Physics, 02.10.2020 14:01 Clervoyantyvonne
The mass of helium gas in a balloon is .
the weight of the gas minus the balloon
the amount of matter inside the balloon
the amount of matter including the balloon
the mass of helium minus the mass of the balloon
Answers: 2
Physics, 21.06.2019 22:30
The of a machine determines its "usefulness." a. input force b. output force c. mechanical advantage
Answers: 2
Physics, 22.06.2019 01:30
The speed of light in a material is 0.50 c. what is the critical angle of a light ray at the interface between the material and a vacuum?
Answers: 1
Physics, 22.06.2019 10:40
As you are trying to move a heavy box of mass m, you realize that it is too heavy for you to lift by yourself. there is no one around to , so you attach an ideal pulley to the box and a massless rope to the ceiling, which you wrap around the pulley. you pull up on the rope to lift the box. use g for the magnitude of the acceleration due to gravity and neglect friction forces. once you have pulled hard enough to start the box moving upward, what is the magnitude f of the upward force you must apply to the rope to start raising the box with constant velocity? express the magnitude of the force in terms of m, the mass of the box.
Answers: 1
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