Which of these age ranges best describes the lunar maria?
A) 2.5 - 1.0 billion years
B) 100 - 65 million years
C) 8.6 - 6.0 billion years
D) 3.9 - 3.2 billion years
E) a few million years to present lava flows seen erupting
D
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Consider a situation where you carry a 20-N box up a flight of stairs, raising its elevation by 5 m.The work you do is 4 J
a. True b. False Indicate whether the statement is true or false
When was Pluto discovered?
A) about 30 years ago B) about 80 years ago C) about 200 years ago D) about 2000 years ago E) in ancient history
Three 4.00-? resistors are connected in parallel to a 10.4-V battery. What is the current in any one of the resistors?
a. 14.4 A b. 6.76 A c. 2.60 A d. 41.6 A e. 6.40 A
Two long parallel wires are separated by 2.0 cm. The current in one of the wires is three times the other current. If the magnitude of the force on a 2.0-m length of one of the wires is equal to 60 mN, what is the greater of the two currents?
a. 2.0 A b. 1.0 A c. 3.0 A d. 9.0 A e. 1.5 A