answer to 7x 2 30

Question: Two electric bulbs have resistances in the ratio 1:2. If they are joined in series, the energy consumed in them are in the ratio _________. 1. 1:2 2. 2:1 3. 4:1 4. 1:1 Answer: 2..

Question: An object of size 2.0 cm is placed perpendicular to the principal axis of a concave mirror. The distance of the object from the mirror equals to the radius of curvature. The size of the image will be ______________. 1. 0.5 cm 2. 1.5 cm 3. 1.0 cm 4...

Calculate the volume of ammonia formed at STP in 'ml' by treating 2.675 g of ammonium chloride with excess of calcium hydroxide (Relative Atomic Mass of N=14, O=16, H=1, Cl=35.5, Ca=4..

Question: The preganglionic fibres and the postganglionic fibres are a part of ____________. 1. central nervous system 2. peripheral nervous system 3. autonomous nervous system 4. endocrine system Answer: ..

Question: Progesterone is secreted by ________________. 1. ovarian follicle 2. Graffian follicle 3. Corpus luteum 4. Corpus albicans Answer: ..

Question: Nuclear fusion reactions happens spontaneously in ______. 1. the core of the earth 2. the commercial nuclear reactor 3. the atmosphere of the sun 4. the eruption of a volcano Answer: ..

Question: A triangular field with sides 26 m, 28 m, 30 m has to be leveled. If the cost of leveling is Rs.20 per m 2 . What is the total cost? Answer: a = 26 m, b = 28 m, c = 30 m = 7 x 6 x 4 x..

Find the two numbers whose sum is 30 and the product is maximum. => 15, 15 or 12, 18 or 14, 16 or 13, 17..

Which of the following shows the factors of 30? => 30 = 5 x 3 x 2 or 30 = 5 x 3 x 3 or 30 = 5 x 2 x 2 or 30 = 5 x 5 x 2..

Convert 30% into a fraction. => 7 20 or 3 10 or 1 4 or 2 5..