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Evaluate each of the following : (g) (−31)÷[(30)+(−1)] (h) [(−36)÷12]÷3 (i) [(−6)+5]÷[(−2)+1]
07
Oct
Evaluate each of the following : (g) (−31)÷[(30)+(−1)] (h) [(−36)÷12]÷3 (i) [(−6)+5]÷[(−2)+1] Evaluate each of the following : (g) (−31)÷[(30)+(−1)] (h) [(−36)÷12]÷3 (i) [(−6)+5]÷[(−2)+1] October 7, 2020 Category: Chapter 1 - Integers , Maths , NCERT Class 7 ,
Figure shows a liquid flowing through a tube at the rate of 0.1 m^3/s. The tube is branched into two semicircular tubes of cross-sectional area A/3 and 2A/3. The velocity of liquid at Q is (the cross section of the main tube is A = 10^−2 m^2 and vp = 20 m/s)
07
Oct
Figure shows a liquid flowing through a tube at the rate of 0.1 m^3/s. The tube is branched into two semicircular tubes of cross-sectional area A/3 and 2A/3. The velocity of liquid at Q is (the cross section of the main tube is A = 10^−2 m^2 and vp = 20 m/s) A hole is [...]
Evaluate each of the following : (d) (−49)÷(49) (e) 13÷[(−2)+1] (f) 0÷(−12)
07
Oct
Evaluate each of the following : (d) (−49)÷(49) (e) 13÷[(−2)+1] (f) 0÷(−12) Evaluate each of the following : (d) (−49)÷(49) (e) 13÷[(−2)+1] (f) 0÷(−12) October 7, 2020 Category: Chapter 1 - Integers , Maths , NCERT Class 7 ,
Equal volume of two immiscible liquids of densities ρ and 2ρ are filled in a vessel as shown in the figure. Two small holes are punched at depths h/2 and 3h/2 from the surface of lighter liquid. If v1 and v2 are the velocities of efflux at these two holes, then v1/v2 is
07
Oct
Equal volume of two immiscible liquids of densities ρ and 2ρ are filled in a vessel as shown in the figure. Two small holes are punched at depths h/2 and 3h/2 from the surface of lighter liquid. If v1 and v2 are the velocities of efflux at these two holes, then v1/v2 is A hole [...]
There are two identical small holes of area of cross section a on the opposite sides of a tank containing liquid of density ρ. The differences in height between the holes is h. The tank is resting ona smooth horizontal surface. The horizontal force which will have to be applied on the tank to keep it in equilibrium is
07
Oct
There are two identical small holes of area of cross section a on the opposite sides of a tank containing liquid of density ρ. The differences in height between the holes is h. The tank is resting ona smooth horizontal surface. The horizontal force which will have to be applied on the tank to keep [...]
Evaluate each of the following : (a) (−30)÷10 (b) 50÷(−5) (c) (−36)÷(−9)
07
Oct
Evaluate each of the following : (a) (−30)÷10 (b) 50÷(−5) (c) (−36)÷(−9) Evaluate each of the following : (a) (−30)÷10 (b) 50÷(−5) (c) (−36)÷(−9) October 7, 2020 Category: Chapter 1 - Integers , Maths , NCERT Class 7 ,
A cement company earns a profit of Rs. 8 per bag of white cement sold and a loss of Rs. 5 per bag of grey cement sold. (a) The company sells 3,000 bags of white cement and 5,000 bags of grey cement in a month. What is its profit or loss?
07
Oct
A cement company earns a profit of Rs. 8 per bag of white cement sold and a loss of Rs. 5 per bag of grey cement sold. (a) The company sells 3,000 bags of white cement and 5,000 bags of grey cement in a month. What is its profit or loss? 000 bags of grey [...]
The opening near the bottom of the vessel shown in the figure has an area A. A disc is held against the opening keep the liquid from running out. Let F1 be the net forces on the disc applied by liquid and air in this case. Now the disc is moved away from the opening a short distance. The liquid comes out and strikes the disc in elastically. Let F2 be the force exerted by the liquid in this condition. The F1/F2 is
07
Oct
The opening near the bottom of the vessel shown in the figure has an area A. A disc is held against the opening keep the liquid from running out. Let F1 be the net forces on the disc applied by liquid and air in this case. Now the disc is moved away from the opening [...]
In a class test containing 10 questions, 5 marks are awarded for every correct answer and (-2) marks are awarded for every incorrect answer and 0 for questions not attempted. (iii) Heena gets two correct answers and five incorrect answers out of seven questions she attempts. What is her score ?
07
Oct
In a class test containing 10 questions, 5 marks are awarded for every correct answer and (-2) marks are awarded for every incorrect answer and 0 for questions not attempted. (iii) Heena gets two correct answers and five incorrect answers out of seven questions she attempts. What is her score ? Find the product In [...]
In a class test containing 10 questions, 5 marks are awarded for every correct answer and (-2) marks are awarded for every incorrect answer and 0 for questions not attempted. (ii) Reshma gets five correct answers and five incorrect answers, what is her score?
07
Oct
In a class test containing 10 questions, 5 marks are awarded for every correct answer and (-2) marks are awarded for every incorrect answer and 0 for questions not attempted. (ii) Reshma gets five correct answers and five incorrect answers, what is her score? 5 marks are awarded for every correct answer and (-2) marks [...]