Which of the following best describes why the smaller terrestrial worlds have cooler interiors than the larger ones?
A) They were cooler when they formed.
B) The smaller ones are farther from the Sun.
C) They have relatively fewer radioactive elements.
D) They have relatively more surface area compared to their volumes.
E) They had more volcanic eruptions in the past, which released their internal heat.
D
You might also like to view...
A crystal diffracted a beam of electrons. The crystal spacing was 0.18 nm and the maximum scattering occurred at 80.° relative to the surface normal. The electrons were directed normally onto the crystal
(a) What is the wavelength of the electrons? (b) What potential difference accelerated the electrons?
If the stars at the turnoff point of a cluster have a mass of 3M, what is the age of the cluster?
a. 3.0×10^10 years b. 3.3×10^9 years c. 6.4×10^8 years d. 1.6×10^11 years e. The age of a star cluster cannot be determined from the mass of stars at the turnoff point.
A +5.0-µC point charge is 12 cm from a -5.0-µC point charge. What is the magnitude of the electric field they produce at the point on the line connecting them
where their electric potential (relative to infinity) is zero? (k = 1/4??0 = 9.0 × 109 N ? m2/C2) A) 0 N/C B) 12.5 MN/C C) 0.75 MN/C D) 25 MN/C E) 1.5 MN/C
Two identical particles, each with a mass of 4.5 ?g and a charge of 30 nC, are moving directly toward each other with equal speeds of 4.0 m/s at an instant when the distance separating the two is equal to 25 cm. How far apart will they be when closest to one another?
a. 9.8 cm b. 12 cm c. 7.8 cm d. 15 cm e. 20 cm