Question

please my this question
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Answer 1

Ans. 2)

1) NaHCO₃

2) Na2CO3

3) NaOH

4) The compound plaster of paris is prepared by heating gypsum at 120oC. The chemical formula for the plaster of paris is (CaSO4)2. H2O.

Ans3)

1) The pyloric sphincter is a band of smooth muscle at the junction between the pylorus of the stomach and the duodenum of the small intestine. It plays an important role in digestion, where it acts as a valve to controls the flow of partially digested food from the stomach to the small intestine.

2) The largest artery is the aorta, the main high-pressure pipeline connected to the heart's left ventricle. The aorta branches into a network of smaller arteries that extend throughout the body. The arteries' smaller branches are called arterioles and capillaries.

Ans5) Focal length (f ) = -15 cm

Distance of image (v) = -10 cm

\(\frac{1}{v} – \frac{1}{u} = \frac{1}{f}\)

1/u = -(1/10) – (1/- 15)

1/u =1/15 – 1/10

1/u = -0.033

u = -30 cm

so the object is placed 30 cm away from the concave lens.

Ray diagram ( the pic)

Answer 2

Answer:

Q2 BAKING SODA - NaHCO3

WASHING SODA- Na2CO3

SODIUM HYDROXIDE- NaOH

PLASTER OF PARIS- (CaSO4)2.H2O

Q3 SPHINCTER MUSCLE

AORTA

Q5 f= -15cm , v= -10 cm , u=?

1/f = 1/v + 1/u

- 1/15 = - 1/10 + 1/u

1/u = -1/15 + 1/10

1/u=-10+15/150

1/u=5/150

1/u= 1/30

U = 30cm