How fast does a pulsar initially spin?
a. 10 times per second b. 1 time per second
c. 100 times per second d. 1000 times per second
a
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Polyacetylene conducts electricity if it has bonding defects called _________.
Fill in the blank(s) with the appropriate word(s).
Why is the hypothesis that life on Earth came from outer space considered plausible?
A) because alien DNA is like human DNA B) because organic molecules have been found in space C) because many meteorites contain complex organic molecules D) because Earth has had many collisions in its history E) because Earth formed with the Sun from the solar nebula
Much of the land on the west coast of North America began as volcanic islands in the Pacific
Indicate whether the statement is true or false
A ballerina spins initially at 1.5 rev/s when her arms are extended. She then draws in her arms to her body and her moment of inertia becomes 0.88 kg ? m2, and her angular speed increases to 4.0 rev/s. What was her initial moment of inertia?
What will be an ideal response?