Please do all this
Answers
1.
a) (ii) Two bar magnets will be formed
b) (iii) None of these
2. 104degree fahrenheit
3. A Lodestone is a naturally occurring piece of magnetic iron oxide. ... The word lodestone comes from the use of pieces of ore from Norway and Sweden which were suspended and used as guiding or leading stone; the Saxon word Læden means "to lead".
4. CGS (Centimeter Gram System) unit of “Latent Heat of Vaporization” is c) Cal/g. ... The SI unit of “Latent heat of Vaporization” is J/kg
5. Rectilinear Propagation Of light
6. cinema screen is made rough and white, so that irregular reflection takes place and the picture is visible from any direction in the cinema hall. In an irregular reflection, the reflected rays travel in all possible directions
7. opposite BOO opposite K
8. Mercury is the only one in liquid state at room temperature. It's used in thermometers because it has high coefficient of expansion. ... It also has a high boiling point which makes it very suitable to measure higher temperatures. Also, it has a shiny appearance and doesn't stick to the glass surface of glass.
9. Change of speed causes change of direction
Light refracts whenever it travels at an angle into a substance with a different refractive index (optical density). This change of direction is caused by a change in speed. ... When light travels from air into water, it slows down, causing it to change direction slightly.
10.
(i) When a ray passes from air into glass the direction in which the light ray is travelling changes. The light ray appears to bend as it as it passes through the surface of the glass. ... The bending of a ray of light also occurs when the ray comes out of glass or water and passes into air.
(ii) Light waves change speed when they pass across the boundary between two substances with a different density , such as air and glass. This causes them to change direction, an effect called refraction . the light slows down going into a denser substance, and the ray bends towards the normal. ...
1. M.C.Q. QUESTIONS...
A. (¡¡) two bar magnets shall be formed.
B. (¡¡¡) none of the above
2. it's equal to 104°ferheniet.
3. A Lodestone is a naturally occurring piece of magnetic iron oxide. ... The word lodestone comes from the use of pieces of ore from Norway and Sweden which were suspended and used as guiding or leading stone; the Saxon word Læden means "to lead".
4. CGS (Centimeter Gram System) unit of “Latent Heat of Vaporization” is c) Cal/g. In CGS system of unit refers to the Centimeter Gram System unit. The SI unit of “Latent heat of Vaporization” is J/kg.
5. RECTILINEAR THEORY OF LIGHT
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When the shutter is opened, light shines through to imprint an image on photographic paper or film placed at the back of the camera. Pinhole cameras rely on the fact that light travels in straight lines – a principle called the rectilinear theory of light. This makes the image appear upside down in the camera.
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6. cinema screen is made rough and white, so that irregular reflection takes place and the picture is visible from any direction in the cinema hall. In an irregular reflection, the reflected rays travel in all possible directions.
8. Mercury is the only one in liquid state at room temperature. It's used in thermometers because it has high coefficient of expansion. ... It also has a high boiling point which makes it very suitable to measure higher temperatures. Also, it has a shiny appearance and doesn't stick to the glass surface of glass.
9. Change of speed causes change of direction
Light refracts whenever it travels at an angle into a substance with a different refractive index (optical density). This change of direction is caused by a change in speed. ... When light travels from air into water, it slows down, causing it to change direction slightly.
10.
A] Light waves change speed when they pass across the boundary between two substances with a different density , such as air and glass. This causes them to change direction, an effect called refraction . the light slows down going into a denser substance, and the ray bends towards the normal.
B] When a ray passes from air into glass the direction in which the light ray is travelling changes. ... This 'bending of a ray of light' when it passes from one substance into another substance is called refraction. The bending of a ray of light also occurs when the ray comes out of glass or water and passes into air.
C] The attachment pasted above is this diagram...
hope it helps you;!
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