Correct Answer: A. death

Explanation

(a)(i) The incident ray, the refracted ray, and the normal at the point of incidence, all lie in the same plane. OR The ratio of the sine of angle of incidence to the sine of angle of refraction is a constant \(\frac{\text{Sin i}}{\text{Sin r}}\) = Constant

Place the triangular prism on the drawing sheet and trace the outline. Arrange two pins on one side vertically and using two other pins, determine the emergent ray on the other side. Remove the prism and. join the position of pins to meet the outline of the prism. Draw the normal at the point of incidence. Produce both the incident and the emergent rays to intersect and measure the angles of incidence I° and the deviation d°. Repeat the procedure for at least four other values of i. Plot a graph of d on the vertical axis against i on the horizontal axis. Obtain minimum deviation D as below.

n = \(\frac{sin \frac{1}{2}(A +D)}{sin \frac{1}{2} A}\)

= \(\frac{sin \frac{1}{2} (60 + D)}{sin 30}\)

Precautions

- neat traces

- pins fixed vertically

- Avoid parallax in reading protector

(b)(i)

(ii) n = \(\frac{\text{real depth}}{\text{apparent depth}}\)

apparent depth = \(\frac{\text{real depth}}{n}\)

= \(\frac{12}{1.5}\)

= 8cm

Apparent displacement = real depth - apparent depth

= 12 - 8 = 4cm

Correct Answer: C. \(\frac{1}{3}\)

Explanation

\(\frac{8^{\frac{2}{3}}*27^{\frac{-1}{3}}}{64^{\frac{1}{3}}}\)

\(\frac{2^2*3^{-3}}{4} = 3^{-1} = \frac{1}{3}\)

Correct Answer: C. disobedience to the prophet

Correct Answer: C) refraction

Correct Answer: B) commensalism

Explanation

The question is asking about the meaning of an association indicated by the sign +0. The + sign is used to indicate a relationship where an organism gains, while 0 is used when an organism is unaffected. So, the combination of + and 0 indicates an association where one organism benefits while the other is not affected. This type of association is known as commensalism, which is a type of symbiotic relationship between two organisms in which one organism benefits, while the other organism is neither helped nor harmed. In this relationship, the organism that benefits is called the commensal, while the other organism is called the host. For example, a bird building its nest in a tree is an example of commensalism. The bird benefits by having a safe place to lay eggs and raise its young, while the tree is not affected by the bird's presence. In summary, an association indicated as +0 is known as commensalism, which is a type of symbiotic relationship where one organism benefits while the other is neither helped nor harmed.

Correct Answer: C. sugar refining

Correct Answer: B. Magnesium

Correct Answer: D. Medium of exchange

Explanation

The characteristics of money are durability, portability, divisibility, uniformity, limited supply, and acceptability

Correct Answer: B. jump down from the pinnacle of the temple