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- a) Population is an important resource. Population is an important resource as it is the human resources that ultimately affect the progress of a country. Its qualitative aspects l... 1
- b) Brazil’s population density is very less. Brazil’s population density is very less because almost half of its area is covered by the tropical rainforests of the Amazon basin. The den... 1
- c) India’s population density is high. India’s population density is high because most of the areas have natural resources that support agriculture and industries. Other factors l... 1
- d)The density of population is sparse in Amazon basin. The Amazon basin in Brazil has tropical rainforests as it is closer to the equator and it rains throughout the year. It has dense and divers... 1
- e) Population density is high in the Ganga plains. The Ganga plains of India have a high population density due to many reasons. The northern plains have been densely populated since centurie... 1
- A) Compare and classify the population densities shown in the squares ‘a’ and ‘b’ representing 1 sq.km of area. Answer:: The population density is a measurement of population per unit area or unit volume. The population density of Figure (a) is 7 perso... 1
- b) If in figure B, one sign = 100, then what will be the sex ratio? Explanation: The sex ratio is the ratio of males to females in a population. In the figure, there are 10 females and 8 males. If one figure... 1
- Q6 )Comment upon the population density of fig. 6.1 (b) The population density is a measurement of population per unit area or unit volume. In Figure 6.1 (b), the population density is unevenly di... 1
- One of the diameter of the circle circumscribing the rectangle ABCD is 4y = x + 7. If A and B are the points Let O be the centre of circle M be mid point of AB. Then , OM ⊥ AB ⇒ M (1,4) Since, slope of AB = 0 Equation of straight line MO is x = 1 an... 1
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- MHT CET 2018 Question Paper With Answer Key Download PDF Download MHT CET 2018 Question Paper with solutions for Maths, Physics & Chemistry in PDF format provided by google and brainiak . Solving M... 1
- MHTCET Question paper 2017 previous year question papers Download MHT CET 2017 Question Paper with solutions for Maths, Physics & Chemistry in PDF format provided by google and brainiak . Solving M... 1
- A rectangular wire frame of size 2 cm x 2 cm, is dipped in a soap solution and taken out. Answer: 3x10⁻⁵ J or 30μJ Explaination: A2=3x3=9 and A1= 2x2=4 Area are in cm² let convert it to m² A2=9x10⁻⁴ and A1=4x10⁻⁴ , T=3x10⁻² The ex... 1
- How much work is required to form a bubble of 2 cm radius from the soap solution having surface tension 0.07 N/m. Answer= 0.703× 10-3 J \ \ \ or \ \ \ 7.038× 10⁻⁴ J Explaination:: Given:: Radius of the bubble = 2 cm or 0.02 m Surface tension = 0.07 N/m S... 1
- A drop of mercury of radius 0.2 cm is broken into 8 droplets of the same size. Find the work done if the surface tension of mercury is 435.5 dyne/cm Answer:: 2.19 x 10⁻⁵ J Explaination:: Given :: R = 0.2 cm, n = 8, T = 435.5 dyn/cm As the volume of the liquid remains constant, volume of n... 1
- Twenty seven droplets of water, each of radius 0.1 mm coalesce into a single drop. Find the change in surface energy. Surface tension of water is 0.072 N/m. Correct answer = 1.628 x 10⁻⁷ J Explaination :: Given :: r=0.1mm =0.1 x 10⁻³m , T=0.072 N/m Let R be the radius of the single drop formed du... 1
- An air bubble of radius 0.2 mm is situated just below the water surface. Calculate the gauge pressure. Surface tension of water = 7.2x 10-2 N/m. Correct Answer: 720 N/m² Explaination:: Given : Radius of bubble =0.2 mm = 2× 10⁻⁴ m , surface tension of water = 0.072 N/m = 720× 10⁻⁴ N/m... 1
- Calculate the rise of water inside a clean glass capillary tube of radius 0.1 mm, when immersed in water of surface tension 7x10-2 N/m. Correct Answer = 0.142 m Explaination Given:: r = 0.1 mm = 10⁻⁴ m, T = 7 × 10⁻² N/m, θ = 0°, ρ = 1000 kg/m³, g = 9.8 m/s^(2 ) To find: Heigh... 1
- The pressure of water inside the closed pipe is 3 x105 N/m2. This pressure reduces to 2x105 N/m2 on opening the value of the pipe. Correct answer = 14.14 m/s Explaination:: Given:: p₁ = 3 × 10⁵ Pa, v₁ = 0, p₂ = 2 × 10⁵ Pa, ρ = 10³ kg/m³ Assuming the potential head to be... 1
- With what velocity does water flow out of an orifice in a tank with gauge pressure 4 x105 N/m2 before the flow starts? Correct answer= 28.28 m/s Explaination Given:: p - p₀ = 4 × 10⁵ Pa, ρ = 10³ kg/m³ If the orifice is at a depth h from the water surface in a... 1
- The speed of water is 2m/s through a pipe of internal diameter 10 cm. Correct answer =7.07 x 10⁻² m Explaination:: Given : d1=10cm =0.1 m , v1=2m/s, v2=4m/s Solution: by the equation of continuity , the ratio o... 1
- With what terminal velocity will an air bubble 0.4 mm in diameter rise in a liquid of viscosity 0.1 Ns/m2 and Answer= - 0.782 × 10^(-3 )m/s (upwards) Given: d=0.4 mm, r=d/2 = 0.2mm= 2×10⁻⁴ m, , h = 0.1 Pa-s, p_L = 0.9 × 10³ kg/m^(3 )= 900 kg/m³, ^( )... 1