It was exciting to discover higher-transition temperature superconductors because cooling represents a significant energy cost
What will be an ideal response?
Cooling is a significant cost, and the high-temperature superconductors could
save a considerable of energy and money in reduced cooling expenses.
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Which of the following types of electromagnetic radiation has the smallest frequency?
a. x-rays b. visible light c. radio d. gamma-rays e. infrared radiation
A car is traveling along a freeway at 65 mph. What is the linear speed, relative to the highway, of each of the following points on one of its tires?
(a) the highest point on the tire (b) the lowest point on a tire (c) the center of the tire What will be an ideal response?
A hobbyist launches a projectile from ground level on a horizontal plain. It reaches a maximum height of 72.3 m and lands 111 m from the launch point, with no appreciable air resistance. What was the angle of launch if g = 9.80 m/s2?
A) 69.0° B) 67.4° C) 22.6° D) 44.8°
Which approach is currently proving to be the most promising way of determining how life on Earth originated?
A) studies of Martian meteorites B) studies of organisms living around deep-sea ocean vents C) studies of the fossil record D) laboratory simulations of conditions present on the early Earth