Compared with the standard hour of 60 minutes used today, the hour of ancient Egypt
A) was longer than the hour used today.
B) was shorter than the hour used today.
C) differed in length depending on the pharaoh in power at the time.
D) was longer than 60 minutes in the summer and shorter than 60 minutes in the winter.
E) divided the entire day into 12 equal parts.
D
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___________ clusters are compact, round, and red, containing mostly old stars
Fill in the blank(s) with correct word
How much energy is stored in a room 3.0 m by 4.0 m by 2.4 m due to the earth's magnetic field with a strength of 5.0 × 10-5 T? (?0 = 4? × 10-7 T ? m/
A) A) 570 mJ. B) 29 mJ. C) 10 mJ. D) 100 mJ. E) 570 mJ.
What was the Ptolemaic model?
A) an Earth-centered model of planetary motion published by Ptolemy B) the Earth-centered model of the cosmos in which the Earth was surrounded by seven perfect spheres, one each for the Sun, Moon, Mercury, Venus, Mars, Jupiter, and Saturn C) a Sun-centered model of planetary motion published by Ptolemy D) the first scientific model to successfully predict solar and lunar eclipses
Addition by 1. Components: Two forces are acting on an object as shown in the figure. Assume that all the quantities shown are accurate to three significant figures.
(a) What is the magnitude of the resultant force on the object?(b) What is the direction of the resultant force?
What will be an ideal response?