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One end of a V-tube containing mercury is connected to a suction pump and the other end to atmosphere. The two arms of the tube are inclined to horizontal at an angle of 45° each. A small pressure difference is created between two columns when the suction pump is removed. Will the column of mercury in V-tube execute simple harmonic motion? Neglect capillary and viscous forces.Find the time period of

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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A tunnel is dug through the centre of the Earth. Show that a body of mass ‘m’ when dropped from rest from one end of the tunnel will execute simple harmonic

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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A simple pendulum of time period 1s and length l is hung from a fixed support at O, such that the bob is at a distance H vertically above A on the ground (Fig. ). The amplitude is o θ . The string snaps at` θ = θ_ 0 /2`. Find the time taken by the bob to hit the ground. Also find distance from A where bob hits the ground. Assume θ 0 to be small so that ` sinθ_0 and cos θ_0 =1`

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Using appropriate properties, find

asked Jan 18, 2022 in 8th-maths by Simran (1.8k points)

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Let O, P and Z represent the numbers 0, 3 and -5 respectively on the number line. Points Q, R and S are between O and P such that OQ = QR = RS = SP. What are the rational numbers represented by the points Q, R and S. Next choose a point T between Z and O so that ZT = TO. Which rational number does T

asked Jan 18, 2022 in 8th-maths by sumit (1.6k points)

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A farmer has a field of area `49 4/5`ha. He wants to divide it equally among his one son and two daughters. Find the area of each one’s share.(ha means hectare; 1 hectare = 10,000

asked Jan 18, 2022 in 8th-maths by yogita (1.8k points)

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Let a, b, c be the three rational numbers where `a=2/3`, `b=4/5` and `c= -5/6` Verify: a + (b + c) = (a + b) +c (Associative property of

asked Jan 18, 2022 in 8th-maths by nikhil (1.8k points)

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Let a, b, c be the three rational numbers where `a=2/3`, `b=4/5` and `c= -5/6` Verify: `axx(bxxc) = (axxb)xxc` (Associative property of

asked Jan 18, 2022 in 8th-maths by krutika (1.7k points)

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Solve the following questions and write your observations. (i)`3/7 + 0 = ?` (ii) `2/3 xx 1 =

asked Jan 18, 2022 in 8th-maths by yogita (1.8k points)

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Solve the following questions and write your observations. `(i) (-6)/7 xx 1 = ?` (vi) `9/8 × 1 =

asked Jan 18, 2022 in 8th-maths by krutika (1.7k points)

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Write any 5 rational numbers between `-5/6` and `7/8`

asked Jan 18, 2022 in 8th-maths by krutika (1.7k points)

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Identify the rational number which is different from the other three : `2/3,-4/5,1/2,1/3`. Explain your

asked Jan 18, 2022 in 8th-maths by krutika (1.7k points)

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Problem Solving StrategiesProblem : The product of two rational numbers is –7. If one of the number is –10, find the

asked Jan 18, 2022 in 8th-maths by nishit (1.8k points)

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Solve the following: Select the rational numbers from the list which are also the integers.

asked Jan 18, 2022 in 8th-maths by nikhil (1.8k points)

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Select those which can be written as a rational number with b denominator 4 in their lowest form:

asked Jan 18, 2022 in 8th-maths by sumit (1.6k points)

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Using suitable rearrangement and find the sum: (a) `4/7+((-4)/9)+3/7+((-13)/9)` (b)

asked Jan 18, 2022 in 8th-maths by purvi (1.8k points)

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Verify – (– x) = x for (i) x= `3/5` (ii) x= `(-7)/9 ` (iii) x=

asked Jan 18, 2022 in 8th-maths by purvi (1.8k points)

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Give one example each to show that the rational numbers are closed under addition, subtraction and multiplication. Are rational numbers closed under division? Give two examples in support of your

asked Jan 18, 2022 in 8th-maths by nikhil (1.8k points)

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Verify the property `x + y = y + x` of rational numbers by taking `x= 1/2, y=

asked Jan 18, 2022 in 8th-maths by vaibhav (1.7k points)

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Verify the property `x + y = y + x` of rational numbers by taking `x= (-2)/3, y=

asked Jan 18, 2022 in 8th-maths by krutika (1.7k points)

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