A person stands 150 ft away from a flagpole and measures an angle of elevation of 30◦ from his horizontal line of sight to the top of the flagpole. Assume that the person’s eyes are a vertical distance of 6 ft from the ground. What is the height of the flagpole?
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Answer:
All children will inherit an X chromosome from their mother regardless
of whether they are boys or girls. Thus, the sex of the children will be
determined by what they inherit from their father. A child who inherits
an X chromosome from her father will be a girl, and one who inherits a
Y chromosome from him will be a boy.
28 Use of Plastic cups raised the concern towards hygiene thus they were
replaced by disposable plastic cups.
Plastic cups are non-biodegradable and harm the environment friendly.
They were thus replaced by Kulhads.
Making Kulhad made of clay on a large scale resulted in the loss of top
fertile soil.
Now, disposable paper cups are used because - the paper can be
recycled, it is biodegradable and is eco-friendly material which does not
cause environmental pollution.
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29 - Blood passes through filtration units in the kidney called nephron
- Passes through glomerulus in the Bowman's capsule - Ultra
filtration
- Filtrate initially has glucose, amino acids, water, salts and
nitrogenous waste
- Reabsorption – Water (as per the need of the body), Glucose and
amino acids are all reabsorbed –
- Secretion of excess water, salts and urea (nitrogenous waste)
which makes up the urine
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