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An ornament weighing 36 g in air weighs only 34 g in water. Assuming that some copper is mixed with gold to prepare the ornament, find the amount of copper in it. Specific gravity of gold is 19.3 and that of copper is 8.9
07
Oct
An ornament weighing 36 g in air weighs only 34 g in water. Assuming that some copper is mixed with gold to prepare the ornament, find the amount of copper in it. Specific gravity of gold is 19.3 and that of copper is 8.9 An ornament weighing 36 g in air weighs only 34 g [...]
Solve: (i) 2−3/5
07
Oct
Solve: (i) 2−3/5 Solve: (i) 2−3/5 October 7, 2020 Category: Chapter 2 - Fraction and Decimals , Maths , NCERT Class 7 ,
A body B is capable of remaining stationary inside a liquid at the position shown in Fig. (a). If the whole system is gently placed on smooth inclined plane and is allowed to slide down, then (0 <0 < 90∘)
07
Oct
A body B is capable of remaining stationary inside a liquid at the position shown in Fig. (a). If the whole system is gently placed on smooth inclined plane and is allowed to slide down, then (0 <0 < 90∘) A body B is capable of remaining stationary inside a liquid at the position shown [...]
Fill in the blanks: (b) (–75) ÷ _____ = –1 (d) – 87 ÷ _____ = 87 (f) _____ ÷ 48 = –1 (h) _____ ÷ (4) = –3
07
Oct
Fill in the blanks: (b) (–75) ÷ _____ = –1 (d) – 87 ÷ _____ = 87 (f) _____ ÷ 48 = –1 (h) _____ ÷ (4) = –3 Fill in the blanks: (b) (–75) ÷ _____ = –1 (d) – 87 ÷ _____ = 87 (f) _____ ÷ 48 = –1 (h) _____ ÷ [...]
A narrow tube completely filled with a liquid is lying on a series of cylinders as shown in the figure. Assuming no sliding between any surfaces, the value of acceleration of the cylinders for which liquid will not come out of the tube from anywhere is given by
07
Oct
A narrow tube completely filled with a liquid is lying on a series of cylinders as shown in the figure. Assuming no sliding between any surfaces, the value of acceleration of the cylinders for which liquid will not come out of the tube from anywhere is given by A narrow tube completely filled with a [...]
Fill in the blanks: (a) 369 ÷ _____ = 369 (c) (–206) ÷ _____ = 1 (e) _____ ÷ 1 = – 87 (g) 20 ÷ _____ = –2
07
Oct
Fill in the blanks: (a) 369 ÷ _____ = 369 (c) (–206) ÷ _____ = 1 (e) _____ ÷ 1 = – 87 (g) 20 ÷ _____ = –2 Fill in the blanks: (a) 369 ÷ _____ = 369 (c) (–206) ÷ _____ = 1 (e) _____ ÷ 1 = – 87 (g) 20 ÷ [...]
A U-tube of base length l filled with the same volume of two liquids of densities ρ and 2ρ is moving with an acceleration ′a′ on the horizontal plane. If the height difference between the two surfaces (open to atmosphere) becomes zero, then the height h is given by
07
Oct
A U-tube of base length l filled with the same volume of two liquids of densities ρ and 2ρ is moving with an acceleration ′a′ on the horizontal plane. If the height difference between the two surfaces (open to atmosphere) becomes zero, then the height h is given by A hole is made at the [...]
Verify that a ÷ (b + c) ≠ (a ÷ b) + (a ÷c) for each of the following values of a, b and c. (b) a = (-10),b = 1,c = 1.
07
Oct
Verify that a ÷ (b + c) ≠ (a ÷ b) + (a ÷c) for each of the following values of a, b and c. (b) a = (-10),b = 1,c = 1. b and c. (b) a = (-10) B(-1 C(–1 Verify that a ÷ (b + c) ≠ (a ÷ b) + (a [...]
Verify that a ÷ (b + c) ≠ (a ÷ b) + (a ÷c) for each of the following values of a, b and c. (a) a = 12, b = – 4, c = 2
07
Oct
Verify that a ÷ (b + c) ≠ (a ÷ b) + (a ÷c) for each of the following values of a, b and c. (a) a = 12, b = – 4, c = 2 b = 4 b and c. (a) a = 12 c = 2 Verify that a ÷ (b + [...]
An ideal fluid flows in the pipe as shown in the figure. The pressure in the fluid at the bottom P2 is the same as it is at the top P1. If the velocity of the top v1 = 2 m/s. Then the ratio of areas A1 : .A2, is
07
Oct
An ideal fluid flows in the pipe as shown in the figure. The pressure in the fluid at the bottom P2 is the same as it is at the top P1. If the velocity of the top v1 = 2 m/s. Then the ratio of areas A1 : .A2, is A hole is made at [...]