What is the sum of 1123 and 10.3 written with the correct number of significant figures?
A) 1133 B) 1133.3 C) 1133.3000 D) 1.1 × 103 E) 1.13 × 103
A
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About 12 to 24 hours after the last meal, a person's blood sugar level normally varies from 60 to 90 mg per 100 ml of blood, although it may rise to 130 mg per 100 ml after meals high in carbohydrates. That the blood sugar level is maintained within a fairly narrow range, despite uneven intake of sugar, is due to the bodily process called:
a. adaptation b. homeostasis c. inheritance d. metabolism e. development
Mars and Mercury are similar in size, and Mercury is even denser. Why then is it that Mars has more atmosphere?
What will be an ideal response?
Density: A compressed gas with a total mass of 107 kg is stored in a spherical container having a radius of 0.521 m. What is the density of the compressed gas?
A. 181 kg/m3 B. 110 kg/m3 C. 134 kg/m3 D. 161 kg/m3
How do we know the shape of the universe?
A) By observing distant stars during eclipses of the sun. B) By observing the light from distant stars and one star passes in front of another star. C) From the comparison between the pulsations coming from distant neutron stars. D) By triangulation measurements involving the distances to the sun and to the moon. E) By observation of the angular size of a typical wavelike disturbance in the cosmic microwave background.