Answer:
The correct answer is alcohol. It is the common component in beer, wine and any liquor. Usually, alcohol is produced by fermentation of organic products containing glucose to produce alcohol, specifically ethanol, as the important product and the by-products water and carbon dioxide.
When rocks break down because of chemical reactions it is called chemical weathering. The rocks are weakened and subsequent disintegration of rock by chemical reactions. They can be oxidation, hydrolysis and carbonation.
B. double-concave
C. plano-convex
D. plano-concave
Student Answer: C
Answer: Incorrect
Reference:
3. If the distance from a converging lens to the object is less than the focal length of the lens, the image will be _______ the object.
A. real, inverted, and smaller than
B. virtual, upright, and larger than
C. virtual, upright, and smaller than
D. real, inverted, and larger than
Student Answer: A
Answer: Incorrect
Reference:
4. Which of the following values represents an index of refraction of an actual material?
A. .25
B. 0
C. .5
D. 1.25
Student Answer: C
Answer: Incorrect
Reference:
5. Which, if any, of these mirrors can produce a real image?
A. Plane
B. Convex spherical
C. No mirrors can produce a real image.
D. Concave spherical
Student Answer: A
Answer: Incorrect
Reference:
6. When white light is incident on a prism, which one of the resulting color components will have the lowest index of refraction?
A. Yellow
B. Blue
C. Green
D. Orange
Student Answer: C
Answer: Incorrect
Reference:
12. Which of the following is not a reason fluorescent lamps are advantageous over incandescent lamps?
A. Fluorescent lamps operate at a higher temperature than incandescent lamps.
B. Fluorescent lamps are more efficient than incandescent lamps.
C. Fluorescent lamps dissipate more energy as light instead of heat than incandescent lamps.
D. Fluorescent lamps produce light with less glare than incandescent lamps.
Student Answer: B
Answer: Incorrect
Reference:
15. Which of the following is not a characteristic of electromagnetic waves?
A. They can travel through a vacuum.
B. They can be refracted.
C. They can be reflected.
D. They can travel at various speeds through any one material.
Student Answer: B
Answer: Incorrect
Reference:
16. A ray at which angle would produce the most glare?
A. 37 degrees
B. 70 degrees
C. 25 degrees
D. 59 degrees
Student Answer: B
Answer: Incorrect
Reference:
18. Which of the following statements is true of glare control?
A. Using bulbs that aren't frosted will help to diffuse the light and reduce glare.
B. Special care must be taken to prevent glare where a low illuminance is required.
C. Redirecting lamp fixtures and adjusting bulb types will do little to control glare.
D. Indirect lighting is preferred to direct lighting because it produces less glare.
Student Answer: C
Answer: Incorrect
Reference:
19. Which of the following objects uses two converging lenses to produce two images, the second of which is virtual, magnified, and inverted?
A. Slide projector
B. Compound microscope
C. Corrective eyeglasses
D. Camera
Student Answer: D
Answer: Incorrect
Reference:
20. The light intensity of a source is 100 candelas. The illuminance on a surface is 4 lux. How far is the surface from the source?
A. 4 meters
B. 6 meters
C. 5 meters
D. 7 meters
Student Answer: B
Answer: Incorrect
(2) the beaker to the air
(3) the water to the ice cubes
(4) the water to the beaker
CCl4
For central atom C
The formula to calculate hybridization is:
n= 1/2 [group no. central atom +no. of monovalent atoms attached to central metal atom (except oxygen) + magnitude of negative charge - magnitude of positive charge]
n= 1/2 [4 +4 + 0-0]
n= 1/2 [8)
=4
The hybridization is sp3 and the electron geometry is tetrahedral
Due to high amount of dissolved oxygen in cold water, goldfish have a better chance of survival.
what is dissolved oxygen?
Dissolved oxygen is the amount of oxygen that is present in the water bodies.
As dissolved oxygen is very much important for the aquatic animals because their survival depends on the water. When we increases the temperature of water then the amount of dissolved oxygen decreases which cuts off the supply of oxygen to the aquatic animals. That's why every aquatic specie has a better chance of survival in the cold water, due to presence of the abundant dissolved oxygen.
Hence, goldfish has a better survival in cold water because of dissolved oxygen.
To learn more about dissolved oxygen, visit below link: