Fossil fuels are what they are, the amount of effluent cannot be changed in any way
What will be an ideal response?
There are many ways to change effluents. Many of these were discussed in the
chapter—gasification, for example, changes the emissions substantially.
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Which of the following describes a major danger of interstellar travel at near-light speed?
A) Atoms and ions in interstellar space will hit a fast-moving spacecraft like a flood of dangerous cosmic rays. B) Time dilation will slow the heart beats of the crew to a dangerously low rate. C) Asteroid fields floating in interstellar space will present a navigational challenge. D) Any interstellar journey will take much longer than the lives of the crew members.
What are thought to be some possible causes of triggering the contraction of an interstellar cloud?
What will be an ideal response?
The freezing point of pure water is 0°C. Which of the following temperatures represents one that is double this based on an absolute temperature scale?
1.0°C 2.100°C 3.200°C 4.273.15°C
The coefficient of linear expansion of copper is 17 × 10-6 K-1. A sheet of copper has a round hole with a radius of 3.0 m cut out of it
If the sheet is heated and undergoes a change in temperature of 80 K, what is the change in the radius of the hole? A) It decreases by 4.1 mm. B) It increases by 4.1 mm. C) It decreases by 8.2 mm. D) It increases by 8.2 mm. E) It does not change.