Superconductivity is lost when a certain critical temperature is exceeded
Indicate whether the statement is true or false
T
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Mercury features long, steep cliffs in its crust called "scarps" which probably formed
A. by erosion from high solar winds. B. like giant wrinkles as the crust cooled and shrank. C. after impacts from a planetesimal or asteroid. D. as plates of crust shifted as a result of massive earthquakes at a fault. E. from floods of running water left to evaporate after comet impacts.
Relativity predicts that everything in the universe is relative
A) except the laws of nature, which are absolutes B) except the speed of light, which is an absolute C) ast here are no absolutes D) except the laws of nature and the speed of light, which are absolutes
An object rests on an inclined surface. If the inclination of the surface is made steeper, what does the normal force on the object do?
A) increase B) decrease C) stays the same D) The normal force is zero N. E) Cannot be determined without additional information.
Three boxes rest side-by-side on a smooth, horizontal floor. Their masses are 5.0 kg, 3.0 kg, and 2.0 kg, with the 3.0-kg mass in the center. A force of 50 N pushes on the 5.0-kg mass, which pushes against the other two masses
What is the contact force between the 5.0-kg mass and the 3.0-kg mass? A) 0 N B) 10 N C) 25 N D) 40 N E) 50 N