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Fig. shows a container filled with water. Which of the following statements is correct about the pressure of water?

Answer: (d) The pressure at A < Pressure at B Water pressure increases with an increase in depth. The pressure... View Article

Fig. shows a man with a parachute. Name the force which is responsible for his downward motion. Will he come down with the same speed without the parachute?

Answer: His downward motion is due to the force of gravity. His speed will be faster if he lands without... View Article

Fig. shows comets without their tail. Show the tails of the comets at position A, B, and C. In which position will the tail be longest?

Answer: The comet’s tail is always pointed away from the Sun. Because the tail is visible only when the comet... View Article

Fig. shows the word REST written in two ways in front of a mirror. Show how the word would appear in the mirror.

Answer: Answer: The left of the object appears on the right and the right appears on the left in an... View Article

Fig. shows two boys applying force on a box. If the magnitude of the force applied by each is equal, will the box experience any force of friction?

Answer: Frictional force refers to the force generated by two surfaces that contact and slide against each other. Friction is... View Article

Fill in the blanks with appropriate words. (a) Synthetic fibres are also called or fibres. (b) Synthetic fibres are synthesised from raw material called . (c) Like synthetic fibres, plastic is also a

Answer: Synthetic fibres are manmade fibres that have been prepared with chemicals. They’re made up of small units that link... View Article

Fill in the blanks. (a) Phosphorus is a very _____non-metal. (b) Metals are _ conductors of heat and . (c) Iron is reactive than copper. (d) Metals react with acids to produce ____ gas.

Answer: (a) Phosphorus is a very reactive non-metal. Non-metals are the elements that form negative ions by accepting or gaining... View Article

Find and correct the errors in the following mathematical statements. (1) (2x) 2+ 4(2x) + 7 = 2x² + 8x + 7 (2) (2x)² + 5x = 4x + 5x = 9x (3) (3x + 2)² = 3x² + 6x + 4

Answer: Find and correct the errors in the following mathematical statements. (1) (2x) 2 + 4(2x) + 7 = 2x2... View Article

Find and correct the errors in the following mathematical statements. (1) 4(x – 5) = 4x – 5 (2) x(3x + 2) = 3×2 + 2 (3) 2x + 3y = 5xy

Answer: (1) 4(x – 5) = 4x – 5 In the given statement LHS = 4(x – 5) RHS =... View Article

Find and correct the errors in the following mathematical statements. (1) x + 2x + 3x = 5x (2) 5y + 2y + y – 7y = 0 (3) 3x + 2x = 5x²

Answer: (1) x + 2x + 3x = 5x LHS = x+2x+3x = 6x RHS = 5x ∴ LHS ≠... View Article

Find and correct the errors in the mathematical statement. (1) (4x + 5)/4x = 5 (2) (7x + 5)/5

Answer: (1) 3/(4x+3) = 1/4x LHS = 3/(4x+3) RHS = 1/4x ∴ LHS ≠ RHS The correct statement is 3/(4x... View Article

Find and correct the errors in the mathematical statement. (2a + 3b)(a – b) = 2a² – 3b²

Answer: (2a + 3b)(a – b) = 2a2 – 3b2 LHS = (2a + 3b)(a – b) RHS = 2a2... View Article

Find and correct the errors in the mathematical statement. (3x² + 1)/3x² = 1 + 1 = 2

Answer: (3x2 + 1)/3x2 = 1 + 1 = 2 LHS = (3x2+1)/3x2 RHS = 2 LHS = (3x2+1)/3x2 LHS... View Article

Find and correct the errors in the mathematical statement. (a – 4)(a – 2) = a² – 8

Answer: (a – 4)(a – 2) = a2 – 8 LHS = (a – 4)(a – 2) RHS = a2... View Article

Find and correct the errors in the mathematical statement. (a + 4)(a + 2) = a² + 8

Answer: (a + 4)(a + 2) = a2 + 8 LHS = (a + 4)(a + 2) RHS = a2... View Article

Find and correct the errors in the mathematical statement. (y – 3)² = y² – 9

Answer: (y – 3)2 = y2 – 9 LHS = (y – 3)2 RHS = y2 – 9 Using the... View Article

Find and correct the errors in the mathematical statement. (z + 5)² = z² + 25

Answer: (z + 5) 2 = z2 + 25 LHS = (z + 5)2 RHS = z2 + 25 Using... View Article

Find and correct the errors in the mathematical statement. 3/(4x + 3) = 1/4x

Answer: 3/(4x+3) = 1/4x LHS = 3/(4x + 3) RHS = 1/4x So LHS ≠ RHS The correct statement is... View Article

Find and correct the errors in the mathematical statement. 3x/(3x + 2) = ½

Answer: 3x/(3x + 2) = 1/2 LHS = 3x / (3x + 2) RHS = 1/2 ∴ LHS ≠ RHS... View Article

Find and correct the errors in the mathematical statement. 3x²/3x² = 0

Answer: 3x2/3x2 = 0 LHS = 3x2/3x2 RHS = 0 LHS = 3x2/3x2 LHS = 1 ∴ LHS ≠ RHS... View Article

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