[2] 3
1
> 15.SN
B4
R
A small smooth ring R of weight 8.5N is threaded on a light inextensible string. The ends of the
string are attached to fixed points A and B with A vertically above B. A horizontal force of magnitude
15.5 N acts on R so that the ring is in equilibrium with angle ARB = 90°. The part AR of the string
makes an angle with the horizontal and the part BR makes an angle & with the vertical (see diagram).
The tension in the string is TN. Show that T sin 8 = 12 and T cos 0 = 3.5 and hence find 0.
[6]

explanation:

infrared radiation has wavelength in the range between 700 nm and 1 mm. lets' convert these values into scientific notation, keeping in mind that:

let's start from the lower value, we have:

(we moved the dot two places to the left, so we increased the exponent by 2 units, from -9 to -7)

the higher value is:

so, the range of wavelength of infrared radiation is:

true

step-by-step explanation:

it is more then likely a review to you prepare for an upcomign test or quiz

so mark-up is 0.4 multiplied by 180 = 72