Answer:
a. 5 Hertz
b. 35 rotations
Explanation:
a. Frequency is given by
where
is the period, in seconds. Given that
, the frequency of this object's rotation is:

b. Since one rotation, or period, is completed in 0.2 seconds, divide the amount of time (7 seconds) by the time it takes to complete one revolution (0.2 seconds):

Answer:
Explanation:
a ) Let breadth be L , then length will be 1.5 L
Since it is a meter scale , the least count is 1 m.m. So
maximum possible error in a measurement is 1 mm.
In both the measurement of length and breadth , absolute
uncertainty will be 1mm.
Hence there is no difference in absolute uncertainty of their measurement.
b ) percent uncertainty in the measurement of length

= 1 / 15L%
percent uncertainty in the measurement of breadth

1 / 10L%
In breadth it will be higher by
( 1/10L - 1/15L)/ 1/10L
= 1/3
c ) Uncertainty in the measurement of R= 1 %
Area A = π R²
ΔA/A X100 = 2 X ΔR/R X 100
Percentage uncertainty in A = 2 X percentage uncertainty in R
= 2 X 1
=2 %
Therefore percentage accuracy in the calculation of area
= 2 %.
Based on the options above, I see how the last option would actually be most fitting to how "the part of the electromagnetic spectrum that is visible to the human eye". This would be in separate parts, which would be divided into a certain number, which would actually be only 7 ranges of wavelengths. And therefore, this last statement would actually go very well and it would actually be the correct answer. And this would all relate to how <span> the part of the electromagnetic spectrum that is visible to the human eye, it's based on it's own 7 division parts that it has.
Your answer: </span>