The three principal types of mountain building are fold, volcanic, and ______________
Fill in the blank(s) with correct word
fault-block
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As discussed in the Extraordinary Claims box, when the giant impact idea was first proposed, it was generally thought to be so unlikely that it wasn’t seriously considered until decades later, after the Apollo missions to the Moon. What key piece of scientific understanding was missing that made it seem so unlikely when first proposed?
a. An understanding of the number and size of leftover planetesimals in the early solar system. b. An understanding of how heavily cratered the Moon’s surface is. c. A precise age for the solar system. d. An understanding of the difficulty of gravitationally capturing a body as large as our Moon.
An electron traveling due North with speed 4 × 105 m/s enters a region where the earth's magnetic field has the magnitude 5 × 10-5 T and is directed downward at 45° below horizontal. What magnitude force acts on the electron?
What will be an ideal response?
What is the approximate nuclear radius of an isotope of sodium with 11 protons and 12 neutrons?
What will be an ideal response?
The circuit in the figure below consists of two resistors, a switch, an ammeter, and a battery. When the switch is closed, power Pc is delivered to resistor R1. When the switch is opened, which of the following statements is true about the power Po delivered to R1?