According to the text’s final model (including the ocean effect), about when will the earth’s average surface temperature be 288.4 K?
A. 2015
B. 2030
C. 2045
D. Some other date (specify)
C. 2045
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A 10 µC charge is at the origin. A -15 µC charge is on the x-axis 10 cm to the right of the origin. At what point other than at infinity can a 1 µC charge be placed so that there will be no net electrostatic force on it?
A. At one point on the x-axis to the left of the positive charge B. At one point between the two charges C. At some point off the x-axis either above or below D. At one point on the x-axis to the right of the negative charge E. At no point
A mass of 5 kg is released from rest on a smooth incline making an angle of 37° to the horizontal. The radial component of acceleration is closest to:
Household wiring is made with
A. conductors inside insulators. B. insulators inside conductors. C. semiconductors inside conductors. D. semiconductors inside insulators. E. semiconductors inside insulators inside conductors.
If no molecular collisions occurred in a sample of gas, temperature of the gas would
A) increase. B) decrease. C) be unaffected.