Laminar flow has the following properties:
a. Streamlines are parallel and there is no mixing between layers
b. Streamlines intertwine with complex mixing
c. the velocity is relatively slow
d. the velocity is large
e. both a and c
Answer: e. both a and c
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The "plastic" region of the upper mantle extending from about 70 km beneath Earth's surface to 250 km is known as the
A) Gutenberg discontinuity. B) Mohorovi?i? discontinuity. C) outer core. D) crust. E) asthenosphere.
What is the total amount of water vapor that would condense from the air if the outside air were initially 32°C, with 90% relative humidity, and it were cooled down to 21°C and dehumidified down to 50% relative humidity, and you replaced all the air in your house?
This question show how the relative humidity of warm, moist outside air changes when it is brought inside and cooled. People who live in hot, humid climates have to dehumidify their air to feel comfortable. As air cools, its relative humidity increases, making it feel muggy. What will be an ideal response?
According the continental drift hypothesis, continents had once been joined together to form a single huge supercontinent called:
a. Rodinia b. Pannotia c. Pangaea d. Caledonian
Which of the following statements about malaria is true?
A) Malaria is the greatest health threat to northern Eurasia and North America. B) Mosquito saliva transmits tiny sporozooites to the victim when they are bitten. C) The organism that causes malaria is a virus related to H5N1. D) Malaria can be transmitted to humans by contact with pig or bird feces.