Question and answer
In which of the following materials is the velocity of light greatest? A. Air B. Crown glass C. Water D. Fused quartz
Question|Asked by terrellfrank
Asked 4/6/2018 10:34:24 AM
Updated 7/4/2019 1:19:45 PM
1 Answer/Comment
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User: In which of the following materials is the velocity of light greatest? A. Air B. Crown glass C. Water D. Fused quartz

Weegy: The velocity of light is greatest in AIR.
Expert answered|Score 1|Bubbles|Points 7998|

User: Which one of the following scientists did not study the properties of light? A. Einstein B. Maxwell C. Newton D. Kepler

Weegy: Kepler did not study the properties of light.
Expert answered|Score 1|sharpies|Points 8768|

User: The glow emitted by a substance exposed to external radiation is called A. fluorescence. B. phosphorescence. C. bioluminescence. D. luminescence.

Weegy: The glow emitted by a substance exposed to external radiation is called Fluorescence.
Score 1

User: Rays of light incident on a lens and parallel to the principal axis of the lens converge A. in front of the lens. B. in back of the lens. C. at the focal point of the lens. D. at the center of curvature of the lens.

Weegy: Rays of light incident on a lens and parallel to the principal axis of the lens converge - at the focal point of the lens.
Score .974

User: The portion of a light ray that falls on a surface is a/an A. reflected ray. B. specular reflection. C. diffuse reflection. D. incident ray.

Weegy: Portion of light ray that falls on a surface is incident ray.
Expert answered|Score 1|MrG|Points 40821|

User: If a 72-candela light source is located at a distance of 3 meters from a surface, the illuminance on the surface is A. 24 lux. B. 8 lux. C. 216 lux. D. 648 lux.

Question|Asked by terrellfrank
Asked 4/6/2018 10:34:24 AM
Updated 7/4/2019 1:19:45 PM
1 Answer/Comment
New answers
Rating
8
If a 72-candela light source is located at a distance of 3 meters from a surface, the illuminance on the surface is 8 lux.
Solution:
E = I / s²; E = 72/9 = 8 lux.
Added 7/4/2019 1:19:45 PM
This answer has been confirmed as correct and helpful.
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Questions asked by terrellfrank
The process in which a substance changes from a gaseous state to the liquid state is A. condensation. B. critical temperature. C. evaporation. D. absolute zero.
Weegy: The process in which a substance changes from a gaseous state to the liquid state is condensation. (More)
Question|Asked by terrellfrank
Updated 4/5/2018 4:10:40 PM
0 Answers/Comments
In America, the first two parties were the Federalists and the Anti-Federalists. They were divided over _____.
Question|Asked by terrellfrank
Updated 213 days ago|4/25/2020 7:24:19 PM
1 Answer/Comment
In America, the first two parties were the Federalists and the Anti-Federalists. They were divided over the Ratification of the Constitution.
Added 213 days ago|4/25/2020 7:24:19 PM
This answer has been confirmed as correct and helpful.
Which of the following occurs when light is reflected from a rough or unpolished surface? A. The original pattern of the light is distorted. B. The angle of reflection is less than the angle of incidence. C. The angle of reflection is greater than the angle of incidence. D. The original pattern of the light is preserved.
Weegy: The original pattern of the light is distorted, this occurs when light is reflected from a rough or unpolished surface. User: When an object is placed 8 millimeters from a concave spherical mirror, a clear image can be projected on a screen 16 millimeters in front of the mirror. If the object has a height of 4 millimeters, the height of the image is A. 4 millimeters. B. 2 millimeters. C. 8 millimeters. D. 12 millimeters. (More)
Question|Asked by terrellfrank
Updated 38 days ago|10/17/2020 11:12:18 PM
1 Answer/Comment
When an object is placed 8 millimeters from a concave spherical mirror, a clear image can be projected on a screen 16 millimeters in front of the mirror. If the object has a height of 4 millimeters, the height of the image is 8 millimeters.

M = i / p m = 16 mm / 8 mm m = 2 mm 2 x 4 mm = 8 mm.
Added 38 days ago|10/17/2020 11:12:18 PM
This answer has been confirmed as correct and helpful.
When all parts of a circuit are composed of conducting materials, the circuit is said to be A. parallel. B. closed. C. open. D. shorted.
Weegy: When all parts of a circuit are composed of conducting materials, the circuit is said to be closed. (More)
Question|Asked by terrellfrank
Expert Answered
Asked 4/6/2018 11:05:12 AM
0 Answers/Comments
When an electric current flows through a long conductor, each free electron moves A. from one end of the conductor to the other end. B. back and forth between the ends of the conductor. C. through a relatively short distance. D. with a speed of 300,000,000 m/s.
Weegy: When an electric current flows through a long conductor, each free electron moves through a relatively short distance. User: In a cathode ray tube, the number of electrons that reach the fluorescent screen is controlled by the A. cathode. B. grid. C. anode. D. deflecting plate. Weegy: In a cathode ray tube, the number of electrons that reach the fluorescent screen is controlled by the grid. User: A circuit contains two devices that are connected in parallel. If the resistance of one of these devices is 12 ohms and the resistance of the other device is 4 ohms, the total resistance of the two devices is A. 0.333 ohms. B. 3 ohms. C. 16 ohms. D. 0.0625 ohms. (More)
Question|Asked by terrellfrank
Updated 44 days ago|10/11/2020 3:08:41 PM
1 Answer/Comment
A circuit contains two devices that are connected in parallel, If the resistance of one of the devices is 12 ohms and the resistance of the other device is 4 ohms, The total resistance of the two devices is 3 ohms. Solution: 12 x 4 divided by 12 + 4 = 48/16 = 3.
Added 44 days ago|10/11/2020 3:08:41 PM
This answer has been confirmed as correct and helpful.
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