A 500-N tightrope walker stands at the center of the rope. If the rope can withstand a tension of 1400 N without breaking, what is the minimum angle the rope can make with the horizontal?
a. 4°
c. 10°
b. 8°
d. 15°
C
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From meteorite and lunar rock samples, astronomers have determined the age of the Solar System to be ____
a. 4.6 million years b. 10 million years c. 2.4 billion years d. 4.6 billion years e. 8.4 billion years
Due to the temperature and atmospheric conditions of Titan, scientists hypothesize that Titan may have rivers, lakes and possibly an ocean of ____
a. liquid water b. metallic hydrogen c. frozen carbon dioxide d. liquid methane e. liquid nitrogen
When considering whether the density of the universe is above or below the critical density, what needs to be included in the measurement of density?
A) ordinary matter B) ordinary matter and dark matter C) ordinary matter, neutrinos, gravity waves and electromagnetic energy D) ordinary matter, dark matter and electromagnetic energy E) ordinary matter, dark matter, neutrinos, gravity waves, electromagnetic energy and dark energy
Describe a conservative force
What will be an ideal response?