To detect the leakage of gas from the cylinder the substance added to the gas is……..
A) C2H5SH
B) C2H5OH
C) CH3COOH
D) CH3CHO
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Fill in the blanks If heat energy is given to a substance and its temperature remains constant then the substance undergoes a change in_______.
Correct Answer - state
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Curved surface area of a right circular cylinder is `4. 4" "m^2` . If the radius of the base of the cylinder is 0.7 m, find its height.
Correct Answer - (i) 1m (ii) `1.54 m^(3)`
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The ratio between the curved surface area and the total right circular cylinder is `1 : 2`. Find the volume of the cylinder if its total surface area
Correct Answer - `1078 cm^(3)`
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……………. defined an element as any substance that cannot be decomposed into further simple substance by physical or chemical change.
B) Robert Boyle
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A rectangle of length 44 cm is folded along with its breadth and formed a cylinder. Then the radius of the cylinder is (in cm)
Correct option is A) 7
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A rectangle of length 44 cm is folded along with its length and formed a cylinder. Then the radius of the cylinder (cms) is
Correct option is (D) 7 Let radius of cylinder be r cm. \(\therefore\) Circumference of base of cylinder = Length of rectangle \(\therefore\) \(2\pi r=44\) \(\Rightarrow\) \(r=\frac{44}{2\pi}=\frac{44\times7}{2\times22}\) = 7 \(\therefore\) Radius of the cylinder is 7 cm.
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A rectangle of length 44 cm is folded along with its length and formed a cylinder. Then the radius of the cylinder (cms) is
2 Answers
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If the radius and height of a cylinder is x cm and y cm respectively, then the curved surface area of cylinder.
Correct option is (B) 2π xy cm2 r = x cm & h = y cm \(\therefore\) Curved surface area of cylinder \(=2\pi rh\) = \(2\pi\,xy\,cm^2\)
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If the radius and height of a cylinder is x cm and y cm respectively, then the curved surface area of cylinder.
2 Answers
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One litre of water can fill in cylinder A and two litres of water can fill in cylinder B. Then two litres of gas can fill in
C) both ‘A’ and ‘B’
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