The Miller experiment created synthetic DNA
Indicate whether the statement is true or false
F
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Speaking about seeing- what part of the Sun do we see?
A: Inner Core B: Radiation Zone C: Convection Zone D: Photosphere E: Corona
When did humans learn that the Earth is not the center of the universe?
A) within the past 500 years B) about 2,500 years ago C) about 1,000 years ago D) We haven't; there is still considerable scientific debate about whether Earth is the center of the universe.
A charge of uniform volume density (40 nC/m3) fills a cube with 8.0-cm edges. What is the total electric flux through the surface of this cube?
A. 2.9 N ? m2/C B. 2.0 N ? m2/C C. 2.6 N ? m2/C D. 2.3 N ? m2/C E. 1.8 N ? m2/C
It is possible to hear an approaching train before you can see it by listening to the sound wave through the track. If the elastic modulus is 2.0 × 10^11 N/m2 and the density of steel is 7.8 × 10^3 kg/m3, approximately how many times faster is the speed of sound in the track than in air? (vair ? 340 m/s.)
a. 20 b. 5 c. 10 d. 15 e. 25