Examlex
Estimate the volume of a helium-filled balloon at STP if it is to lift a payload of 500 kg.The density of air is 1.29 kg/m3 and helium has a density of 0.178 kg/m3.
YouTube
A video-sharing website in which users can upload, view, and comment on videos.
Video Content
Visual multimedia material, typically accompanied by audio, used for entertainment, education, marketing, or information dissemination purposes.
Professional Musicians
Individuals who earn their living by performing, composing, or teaching music, often with a high level of expertise and training.
Q8: A 4-mol ideal gas system undergoes an
Q24: The noble gases, listed by increasing molecular
Q29: Area on a P-V diagram has units
Q39: Three equal positive charges are placed on
Q42: What does research on the ability to
Q45: Twenty grams of a solid at
Q52: An electron in a TV picture tube
Q59: A 0.20-kg block rests on a frictionless
Q60: When do children first show evidence of
Q66: A flute behaves like a tube open