SCIENCE
PHYSICAL SCIENCES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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300 000 m/s
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3000 000 m/s
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30 000 000 m/s
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300 000 000 m/s
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Detailed explanation-1: -If the The speed of light is approximately 3 × 108 meters per second (m/sec) so the speed of light written in standard numerical form is 300, 000, 000 m/sec. You will just simply move the place holders to 8 places to the right since the exponent is a positive number. So 3^8= 3x100000000 which is equal to 300, 000, 000 .
Detailed explanation-2: -(b) Speed of light in vacuum is 300, 000, 000m/s. Q. The speed of light in vacuum is 3×108 m/s.
Detailed explanation-3: -Now, the scientific notation should contain only significant figures so the digits after the decimal point are rounded off. 300, 000, 000 can be rewritten as 3×100000000 . Hence the scientific notation of 300, 000, 000 is 3×108 .
Detailed explanation-4: -Scientific notation is a shorthand way of writing these numbers. The speed of light is approximately 300, 000, 000 meters per second. This is shortened to 3.0 x 108 m/s, where 8 is the number of zeros that follow the 3.