Correct Answer: A. lead

Correct Answer: C. 134.0kj/kg

Correct Answer: A. was a great military tactician

Explanation

The play is about the conflict between tradition and modernity as manifested in courtship and marriage. Lakunle refuses to pay the traditional bride price for Sidi, losing her to Baroka. Baroka is the Bale of llujinle, he epitomizes traditional polygamous and is based on the payment of the bride price. Lakunle represents love in the modern sense- non-payment of bride price and Complete customs related to love and marriage. In spite of Baroka's seduction of Sidi through the pretence of his impotence after being aided by Sadiku, he marries her, according to custom. The marriage between Baroka and Sidi symbolizes the continuation of the African social order which has love and marriage which is abandonment of tradition and been threatened' by the mockery of western values in the play

Correct Answer: D. adalah

Correct Answer: C. Magrib, Isha

Explanation

(a) When EM radiation of appropriate frequency or wavelength is incident on a metal surface, it causes electrons to be emitted from the surface. This phenomenon is called photoelectric effect. It is a surface phenomenon. Emission is instantaneous and K.E. of emitted electrons depend on frequency or wavelength of incident photons.

(b) A = Incident light or EM radiations

B = Cathode

C = Photoelectrons

D = Anode

E = Vacuum (Evacuated space)

F = Glass tube

(c)(i) Intensity of the incident radiation

(ii) Energy or frequency of the incident radiation.

(d)Similarities

(i) In both, particles are emitted

(ii) Both are surface phenomenon

(iii) Both involves energy changes

Difference

(i) Evaporation involves molecules while photoemission involves electrons.

(ii) Evaporation causes cooling while photoemission does not.

(e)(i) Thermionic emission.

(ii) Ionization of gases.

(iii) Field emission

(f) Photocells can be used.

(i) To open or close doors automatically

(ii) In automatic switching device.

(iii) In television cameras

(iv) As a burglar alarm

(v) As safety devices in paper mills and related industries

(vi) To produce sounds of varying intensities on film tracks.

Correct Answer: A) involve chemical transmission

Explanation

The question is asking about the similarities between the nervous and hormonal systems. The options are given as follows: involve chemical transmission, have widespread effects, shed chemicals into the bloodstream, and evoke rapid response to eliminate response. The correct answer is option A: involve chemical transmission. Both the nervous and hormonal systems use chemicals to transmit messages or signals throughout the body. In the nervous system, neurons use chemical messengers called neurotransmitters to send signals between themselves and to other cells, while in the hormonal system, glands secrete hormones into the bloodstream to carry signals to different parts of the body. While both systems involve chemical transmission, there are some differences between them. For example, the nervous system is faster and more specific in its responses, while the hormonal system is slower and more widespread in its effects. Additionally, the nervous system can respond to immediate changes in the environment, while the hormonal system is more involved in long-term regulation and maintenance of bodily functions. Overall, understanding the similarities and differences between the nervous and hormonal systems is important for understanding how the body communicates and regulates its various functions.

Explanation

(a) \(625^{\frac{3}{8}} \times 5^{\frac{1}{2}} \div 25\)

= \((5^{4})^{\frac{3}{8}} \times 5^{\frac{1}{2}} \div 5^{2}\)

= \(5^{\frac{3}{2}} \times 5^{\frac{1}{2}} \div 5^{2}\)

= \(5^{\frac{3}{2} + \frac{1}{2} - 2}\)

= \(5^{0} = 1\)

(b)(i) \(\tan (\theta + 25)° = 5.145\)

\(\theta + 25 = \tan^{-1} (5.145)\)

\(\implies \theta + 25 = 79°\)

\(\theta = 79° - 25° = 54°\)

(ii) \(5 \cos \theta - 1 = 0\)

\(\implies 5 \cos \theta = 1\)

\(\cos \theta = \frac{1}{5} = 0.2\)

\(\theta = \cos^{-1} (0.2) = 78.463°\)

\(\approxeq 78.5°\) (to one d.p)

Correct Answer: B. barchan