the new reflected ray when the plane mirror is rotated(a) through 15° in the clockwise direction,(b)through
30° in the anticlockwise direction. (3 marks )
(b) A 60 kg woman is on a diet that provides her with 1.046 J daily . If this amount of heat is added to 60 kg
of water at 37° C what will be the final temperature of the water? (3 marks )
SECTION (B)
(Answer ALL questions)
- (a) 0.5 kg of orange squash at 30℃ is placed in a refrigerator which can remove heat at an average rate of
25Js-1. How long will it take to cool the orange squash to 5℃?The specific heat capacity of orange squash
is 4200 J kg-1℃-1. (4 marks )
(b) An object is 200cm in front of a concave mirror of focal length 15cm.How far must the screen be placed
from the centre of curvature of the concave mirror to receive the image of the object? If the object is 2cm
tall, find the size of the image. (4 marks )
7.(a)A heat resistant glass at 15℃ is fully filled with 250cm3 of glycerine.If the temperature increases to 25℃
how much glycerine overflows? The coefficient of volume expansion of glycerine is 5.1x 10-4K-1 and that
Provide labels and caption to the given diagram and mentioning what occur after fertilization. (Do not
copy the diagram in your answer book. Write the label against the number indicated in the lines pointing
towards respective areas of the diagram in your answer book. You are also to write the caption and the
requirements of the question in your answer book.)
(b) Name the parts of the rabbit’s brain and state prominent features of the well -developed part and parts
concealed by this part in the dorsal views of brain.
(c) Give a word diagram to show the general pattern of animal nutrition and state the process of digestion and
and chewing .
(d) Explain the experiment to show how the energy is released during respiration aided by relevant diagram.
(OR)
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