Ozone is an unnatural form of oxygen
What will be an ideal response?
It would be hard to call it "unnatural," because it does occur in nature without
any human interference. It is true, however, that humans can increase or decrease the amount
of ozone compared to what would have been the case. in nature free of humans' effects
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Vegetable oil is boiled by passing steam at 215ºF through a 1-inch ID by 1.25-inch OD steel tube. Predict the overall heat transfer coefficient based on the outside area of the tube if the convective heat transfer coefficients are 25 Btu/hr?ft^2?ºF for steam and 15 Btu/hr?ft^2 ?ºF for the vegetable oil. Neglect fouling factors.
What will be an ideal response?
An evening or morning star is a planet
a. True b. False Indicate whether the statement is true or false
A planetary nebula is visible due to ____
a. blackbody continuum radiation from the interstellar medium b. line emission from the interstellar medium c. scattering from dust grains ejected by a dying star d. blackbody continuum radiation from a hot gas ejected by a dying star e. line emission from ionized hydrogen gas ejected by a dying star
If we were to intercept a strong radio signal at 1420 MHz in binary format from another civilization, this would be an example of
A) a signal used for communication between a civilization's home world and another planet in its own planetary system B) a signal used for local communication in the world where the intelligent beings exist C) an intentional signal beacon D) a signal used for communication between a civilization's home world and another star system