A 7.8-kg solid sphere, made of metal whose density is 2500 kg/ , is suspended by a cord. When the sphere is immersed in water (of density 1000 kg/m3), what is the tension in the cord?
A) 110 N B) 76 N C) 46 N D) 92 N E) 61 N
C
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All the planets in the Solar System revolve in a clockwise motion
a. True b. False Indicate whether the statement is true or false
What evidence suggests that some of the stars in the halo of the Milky Way Galaxy came from mergers with other galaxies?
A) Globular clusters are typically found only in the halo. B) Some halo stars with similar and distinct chemical compositions move together in organized streams. C) Some halo stars are older than our Galaxy. D) Halo stars have randomly oriented orbits.
Three resistors of 12 ?, 12 ?, and 6.0 ? are connected together, and an ideal 12-V battery is connected across the combination. What is the current through the battery if they are connected (a) in series or (b) in parallel?
What will be an ideal response?
Organic chemistry studies chemical compounds that contain at least one atom of
a. nitrogen. b. oxygen. c. carbon. d. hydrogen. e. silicon.