Over the last century, global average temperatures have
A) risen by about 0.85°C (1.5°F)
B) stayed approximately constant
C) risen by about 2.0°C (3.6°F)
D) risen by about 3.0°C (5.4°F)
A
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Potential: A tiny particle with charge + 5.0 ?C is initially moving at 55 m/s. It is then accelerated through a potential difference of 500 V. How much kinetic energy does this particle gain during the period of acceleration?
A. 1.0 × 104 J B. 2.5 × 10-3 J C. 100 J D. 2500 J
Which of the following statements is true regarding latent heat transfer?
What will be an ideal response?
There is a permanent dark side of the Moon.
Answer the following statement true (T) or false (F)
Why does the very thin region at the top of a soap bubble sometimes appear black?
a. Because no light passes through it. b. Because inverted light waves and non-inverted light waves reflecting from the two surfaces cancel each other. c. Because it is too thin to reflect light. d. Because both reflected waves are inverted or else neither is inverted. e. Because the rest of the film creates a shadow that obscures the colors we would otherwise see.