Magma that solidifies before reaching Earth's surface is called
A) intrusive igneous rock.
B) plutonic rock.
C) a pluton.
D) all of the above.
Answer: D
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Which of the following numbers is the largest?
A) 23.62 × 108 B) 0.36 × 109 C) 4.35 × 1010 D) 0.056 × 1011
An electron, initially moving at 2.0 × 104 m/s along the +x-axis, experiences a constant acceleration of 1010 m/s2 in the +y direction. How far from its starting point is the electron after 4.0 × 10-6 seconds?
A) 8.0 m B) 11.3 m C) 9.8 m D) 11.3 cm E) 8.0 cm
Three resistors connected in parallel each carry currents labeled I1, I2, and I3 . Which of the following expresses the value of the total current IT in the combined system?
a. IT = (1/I1 + 1/I2 + 1/I3) c. IT = I1 + I2 + I3 b. IT = I1 = I2 = I3 d. IT = (1/I1 + 1/I2 + 1/I3)-1
A car is driven 1 200 m north at 20.0 m/s and then driven 1 600 m east at 25.0 m/s. What is the magnitude of the average velocity for this trip?
a. 16.1 m/s b. 22.6 m/s c. 31.3 m/s d. 11.3 m/s e. 62.2 m/s