Another name for the Earth's crust is the
A) troposphere
B) lithosphere
C) asthenosphere
D) mesosphere
B
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Five boys are pushing on a snowball, and each is pushing with a force of 10.0.0 N. However, each boy is pushing in a different direction. They are pushing north, northeast, east, southeast, and south. (Each boy is pushing at an angle of 45.0° relative to his neighbor.) What is the magnitude of the total force on the ball?
a. 0 b. 14.1 N c. 24.1 N d. 11.4 N e. 48.3 N
This figure shows an all-sky map of the cosmic microwave background recorded by the Planck telescope. How long did this light travel through space before it reached the telescope?
A) about 14 billion years B) about 380,000 years C) about a million years D) Depending on what portion of the map we're looking at, the light traveled for times between just a few minutes and a few billion years.
Leptons are the fundamental particles that are the building blocks of hadrons
a. True b. False Indicate whether the statement is true or false