In the H-R diagram, the bright blue-white stars that dominate the naked eye sky lie to the:
A) top left.
B) top right.
C) middle of the main sequence.
D) top center.
E) bottom left.
A
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Work: It requires 0.30 kJ of work to fully drive a stake into the ground. If the average resistive force on the stake by the ground is 828 N, how long is the stake?
A. 0.36 m B. 0.23 m C. 0.32 m D. 0.41 m
The magnetic field tilts of which two bodies are the most unusual?
A) Mercury and Earth B) Jupiter and Saturn C) Uranus and Neptune D) Saturn and Venus E) Mars and Saturn
Drummers like to have high-pitched cymbals that vibrate at high frequencies. To obtain the highest frequencies, a cymbal of a fixed size should be made of a material
a. with a low Young's modulus and a low density. b. with a low Young's modulus and a high density. c. with a high Young's modulus and a low density. d. with a high Young's modulus and a high density. e. composed of a metal-plastic laminate.
Geologists refer to remnants of ancient organisms that have changed rapidly in a well defined way to adapt to changing environmental conditions as
a) grading samples. b) correlation tools. c) human time scale pointers. d) index fossils.