Answer the following question given this paragraph: The depression that allows water to collect to form a lake may come about in a variety of ways. The Great Lakes, for example, are glacial lakes. A glacial lake forms when a glacier scrapes a large hole in the ground. When the glacier melts, the water fills the hole and forms a lake. A kettle lake forms in the sediment left by a glacier when a block of ice melts. Kettle lakes are found where continental glaciers once covered the land ( Figure ' below ). Over time lakes get water from rain, streams, and groundwater coming to the surface. Q: What forms when a glacier scrapes a large hole in the ground? Choices: - crater lake - underground cavern - glacial hill - glacial lake A:
glacial lake
Answer the following question given this paragraph: Some people are allergic to certain foods. Nuts and shellfish are common causes of food allergies. Other common causes of allergies include:. Q: Which waves have the longest wavelengths but the least energy in the atmosphere? Choices: - microwaves - channel waves - light waves - radio waves A:
radio waves
Q: Answer the following question given this paragraph: Descriptive statistics and graphs help organize data so patterns and trends are more apparent. Descriptive statistics include the mean and range. Types of graphs include bar, circle, and line graphs. Q: Bar, circle, and line are all types of what? Choices: - theories - maps - algorithms - graphs A:
A: graphs
Question: Answer the following question given this paragraph: Discussion The intensity goes up by a factor of 4 when the amplitude doubles. This answer is a little disquieting. The two individual waves each have intensities of 1.00 W/m 2 , yet their sum has an intensity of 4.00 W/m 2 , which may appear to violate conservation of energy. This violation, of course, cannot happen. What does happen is intriguing. The area over which the intensity is 4.00 W/m 2 is much less than the area covered by the two waves before they interfered. There are other areas where the intensity is zero. The addition of waves is not as simple as our first look in Superposition and Interference suggested. We actually get a pattern of both constructive interference and destructive interference whenever two waves are added. For example, if we have two stereo speakers putting out 1.00 W/m 2 each, there will be places in the room where the intensity is 4.00 W/m 2 , other places where the intensity is zero, and others in between. Figure 16.45 shows what this interference might look like. We will pursue interference patterns elsewhere in this text. Q: Two types of interference found in waves are constructive and what else? Choices: - osmotic - conductive - primitive - destructive A:
Answer: destructive
*Question*
Answer the following question given this paragraph: Electrical energy is useful to us mostly because it is easy to transport and can be easily converted to or from other forms of energy. Of course, conversion involves wast, typically as heat. Q: What type of energy is useful to humans because it's ease of transport and conversion to other forms of energy? Choices: - physical - potential - heat - electrical A:
**Answer**
electrical
(Q).
Answer the following question given this paragraph: Figure 29.17 shows a comet with two prominent tails. What most people do not know about the tails is that they always point away from the Sun rather than trailing behind the comet (like the tail of Bo Peep's sheep). Comet tails are composed of gases and dust evaporated from the body of the comet and ionized gas. The dust particles recoil away from the Sun when photons scatter from them. Evidently, photons carry momentum in the direction of their motion (away from the Sun), and some of this momentum is transferred to dust particles in collisions. Gas atoms and molecules in the blue tail are most affected by other particles of radiation, such as protons and electrons emanating from the Sun, rather than by the momentum of photons. Q: Why do comet tails always point away from the sun instead of trailing behind the comet? Choices: - dust particles attract - dust particles evaporate - dust particles liquify - dust particles recoil A:
(A).
dust particles recoil