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List Two Applications Of Reflection Of Sound.

The working of a stethoscope is also based on the reflection of sound. Reflection of sound is used to measure the distance and speed of... View Article

What Is The Limit As X Approaches Infinity Of Cos X 2?

The limit does not exist. Explore more such questions and answers at BYJU’S.... View Article

Work Done Is Said To Be Zero If The Applied Force Is ………….. To The Direction Of Displacement.

The answer is perpendicular. W = F * S * cosθ For zero Work done θ = 90 cos90° = 0 Hence proved. Work done by a force is zero if... View Article

What Is The Least Count Of Meter Rod?

The least count of meter rod is 1 cm. Explore more such questions and answers at BYJU’S.... View Article

Clay Is Separated From Water By The Method Called _____.

The answer is Decantation. Clay is separated from water by the method called loading and decantation. Loading is the process by which the... View Article

The second Carnatic war was fought between two nizams along with the English and French. They were (A) Anwaruddin and Chanda Sahib. (B) Muzaffar Jung and Anwaruddin.(C) Muzaffar Jung and Nasir Jung.(D) Chanda Sahib and Muzaffar Jung.

The correct answer is (C) Muzaffar Jung and Nasir Jung. Explore more such questions and answers at BYJU’S.... View Article

A kite is flying at a height of 60m above the ground. the string attached to the kite is temporarily tied to a point on the ground. the inclination of the string with the ground is 60°. Find the length of the string assuming that there is no slack in the spring.

P is the position of the kite. Its height from the point Q (on the ground)= PQ = 60m. Let OP= l be the length of the string.... View Article

Assertion: Resonance is a special case of forced vibration in which the natural frequency of vibration of the body is the same as the impressed frequency of external periodic force and the amplitude of forced vibration is maximum. Reason: The amplitude of forced vibrations of a body increases with an increase in the frequency of the externally impressed periodic force. (a) both assertion and reason are incorrect. (b) the assertion is correct but the reason is incorrect. (c) both assertion and reason are correct and the reason is the correct explanation for assertion. (d) both assertion and reason are correct but the reason is not the correct explanation for assertion.

The correct answer is (B) The Assertion Is Correct But The Reason Is Incorrect. Explore more such questions and answers at BYJU’S.... View Article

The pH Of 0.1M NaOH Is (A) 10.(B) 11.(C) 12.(D)13.

The correct answer is (D) 13. NaOH is a strong electrolyte, which completely dissociates in an aqueous solution. pOH = -log pOH = -log... View Article

Water rises to height h in the capillary tube. If the length of the capillary tube above the surface of the water is made less than h then: (A) Water does not rise at all. (B) Water rises up to a point a little below the top and stays there. (C) Water rises up to the tip of the capillary tube and then starts overflowing like a fountain. (D) Water rises up to the top of the capillary tube and stays there without overflowing.

The correct answer is (D) Water rises to the top of the capillary tube and stays there without overflowing. Explore more such questions and... View Article

If X 2 +3X+1=0, Then The Roots Of The Equation Are X= −3± M/2.What Is The Value Of M?

Given: Applying quadratic formula: Therefore,the roots of the given equation are The value of m = 5. Explore more such... View Article

A Vector Perpendicular To The Vector ( I^+2 J^ )And Having Magnitude 3 Sqrt 5 Units Is _____.

Let a vector, r = xi + yj is perpendicular to A = (i + 2j) Therefore, dot product of r and A must be zero. This is because cos 90°= 0 = (xi... View Article

Two identical ball-bearings in contact with each other and resting on a frictionless table are hit head-on by another ball bearing of the same mass moving initially with speed v. If the collision is elastic, which of the following (Fig.) is a possible result after collision?

Let the mass of each ball be m. The kinetic energy (KE) of the system before collision = The kinetic energy (KE) of the system after... View Article

Golden Age Of Dinosaurs’/Age Of Reptiles Was (A) Palaeozoic. (B) Coenozoic.(C) Mesozoic. (D) Psychozoic.

The correct answer is (C) Mesozoic. Mesozoic is the second-to-last era of Earth's geological history, lasting about 252 to 66 million years ago.... View Article

Country : President :: State : _____(A) Speaker.(B) Governor.(C) Chief Minister.(D) Prime Minister.

The correct answer is (B) Governor. Country: President:: State: Governor. The President is the most powerful officer in the country and the... View Article

Write A Chemical Reaction To Affect The Following Transformations: 3− Nitrobromobenzene To 3− Nitrobenzoic Acid

A chemical reaction of 3− Nitrobromobenzene To 3− Nitrobenzoic Acid is: Explore more such questions and answers at BYJU’S.... View Article

An Ordinary Partnership Business Can Not Have _______. (A) More Than 2 Partners. (B) More Than 20 Partners. (C) More Than 50 Partners. (D) More Than 100 Partners.

The correct answer is (D) More Than 100 Partners. According to the new companies act 2013, the maximum number of members in a partnership firm... View Article

Which Of The Following Parts Of A Kidney Contains The Lowest Concentration Of Urea(A) Clomerlus.(B) Loop Of Henle. (C) Bowman’s Capsule. (D) Branches Of The Renal Vein.

The correct answer is (D) Branches Of The Renal Vein. The renal artery carries blood to the kidney. The renal vein carries blood, with much... View Article

A Solid Sphere And A Hollow Sphere Of The Same Mass Have The Same Moment Of Inertia About Their Respective Diameters. The Ratio Of Their Radii Will Be(A) 1:2.(B) 5:4. (C) Sqrt 3 : Sqrt 5.(D) Sqrt 5 : Sqrt 3.

The correct answer is We know: The moment of inertia of solid sphere, The moment of inertia of hollow sphere, As given:... View Article

Humoral Immunity Is Due To_____. (A)L-lymophocytes. (B) B-lymophocytes. (C)P-lymophocytes.(D)T-lymophocytes.

The correct answer is (B) B-lymphocytes. Humoral immunity is moderated by antibodies developed by B lymphocytes and cell-mediated immunity... View Article

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