Buoyancy: A piece of aluminum with a mass of 1.0 kg and density of 2700 kg/m3 is suspended from a light cord and then completely immersed in a container of water having density 1000 kg/m3.(a) Determine the volume of the piece of aluminum.(b) Determine the tension in the cord when the aluminum is immersed in the container of water.
What will be an ideal response?
(a) 3.7 × 10-4 m3 (b) 6.2 N
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The big bang only created hydrogen and helium (with miniscule amounts of lithium) because____
a. gamma ray photons disrupt large nuclei more easily b. antimatter is attracted to large nuclei, leaving only light nuclei c. heavier elements can only be formed through fusion d. elements with an atomic weight of 5 or 8 are unstable e. temperatures were high enough to fuse hydrogen, but not helium
Even if societies on stars in distant galaxies survive at a technological level for only 10 years, that is long enough to establish two-way communication with them
a. True b. False Indicate whether the statement is true or false
Which of the following is NOT true about streaming media?
A. You need very high bandwidth to stream media. B. Frequently it requires a specific media server to transfer data. C. It consumes RAM even when it is not being played. D. Users can choose the file portion they want to play.
Consider a situation where a skater pulls her arms inward, causing her rotation rate to speed up. Angular momentum
a. is definitely conserved b. is definitely not conserved c. may or may not be conserved d. none of the above