Evacuated Magdeburg hemispheres are each
A) sucked together.
B) pushed together by the atmosphere.
C) held together by tension.
Answer: B
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How is an X-ray burst (in an X-ray binary system) similar to a nova?
A) Both involve explosions on the surface of stellar corpse. B) Both typically recur every few hours to every few days. C) Both are thought to involve fusion of hydrogen into helium. D) Both result in the complete destruction of their host stars.
Unpolarized light of intensity Io passed through a Polaroid sheet with its polarizing axis at the 12 o'clock position and then through a second with its polarizing axis at the 1 o'clock position. What is the intensity of the emerging light?
What will be an ideal response?
Which of the following phenomena results from limestone being dissolved by rainwater?
a. Caverns b. Delta formation c. Sea arches d. Beaches
How will the experimental value be affected if some water (liquid) comes through the hose into the calorimeter cup along with the steam?