depend upon the efficient transport of substances into‚ out of‚ and throughout living cells. The process of diffusion can be easily visualized by adding a drop of blue food coloring to a glass of water. Initially‚ the food coloring remains in a small area in the water‚ dying it a dark blue. Over time‚ the molecules of food coloring collide with each other‚ and with molecules of water‚ and the food coloring eventually disperses throughout the entire glass of water‚ resulting in a light blue color in
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Applications of Differentiation 1. If a line y = x + 1 is a tangent to the curve y2= 4x ‚find the point the of contact ? 2. Find the point on the curve y = 2x2– 6x – 4 at which the tangent is parallel to the x – axis 3. Find the slope of tangent for y = tan x + sec x at x = π/4 4. Show that the function f(x) == x3– 6x2 +12x -99 is increasing for all x. 5. Find a‚ for which f(x) = a(x+sinx)+a is increasing 6. Find the intervals in which the function f ( x ) = x3 - 6x2 + 9x + 15 is
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Internal Assessment IB Physics-7 Mr. Parent 14 January 2012 I. Design • Purpose: o To determine how the surface area of a coffee filter affects the average velocity of the coffee filter from the same height. • Variables: o Independent Variable ▪ Surface area- The area of the surface after the folds have been made o Dependent Variable ▪ The Average velocity- calculated by measuring the time and dividing by
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14.81 bars Work: Solute potential: (ψS) = – iCRT = (-2)(.3)( 0.0831)(297)=14.81 bars Water potential: ψ = ψP + ψS = = water potential= 0 + 14.81= 14.81 LAB PART 2 Part 1: What factors limit cell size? 1. What is surface area? Area of given surface 2. What is volume? Area inside a shape 3.
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each. Along this line‚ the midpoint of the base of one triangle is the vertex of the next‚ as shown in the diagram below. What is the area of the region that is covered by the union of the five equilateral triangular regions? Answer: Question Attempt 1 Attempt 2 Attempt 3 1 Triangles The area is: The area is: The area is: Time Score: Question First Attempt Second Attempt Third Attempt Correct (100) Time/Pts Correct (75) Time Correct
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length of 10cm and a width of 3cm. Then find the volume of the box and the total surface area of the paper used to make the box. T.S.A: 5 rectangles and 4 squares 5 x L x W + 4W = 5 x 10 x 3 + 4 x 9 = 186cm Volume: 5 rectangles and 4 squares L x W x H = 10 x 3 x 3 = 90cm Q2. Make another box with the same general shape‚ but chose a different length and width. Then find the volume of the box and the total surface area of the paper used. T.S.A: 5 rectangles and 4 squares = 5 x 4 x 2 + 4 x 4
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Area of a parallelogram-__________ Area of a trapezoid-__________ Area of a circle-__________ Area of a triangle-__________ 1.) (Parallelogram) Find height when base is 7ft and area is 56ft squared. 2.)(Parallelogram) Find base when h=12 and A=216in squared. 3.)(Triangle) Find base when h=9ft and A=35ft squared. 4.)(Trapezoid) Find height when A=25m squared‚ b1=3m‚ and b2=7m. 5.)(Circle) Find radius when A=314ft squared. (Round to the nearest whole number). 6.) Base=12ft Height=12ft
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The effect of size on the effectiveness of diffusion Aim: To use agar blocks infused with 0.1 Molar sodium hydroxide (NaOH) and phenolphthalein to investigate the relationship between shape and surface area: volume ratio on the effectiveness of diffusion. Hypothesis: That for a cube of agar‚ the time taken for complete colourisation due to diffusion of HCl is directly proportional to the cubes volume. Materials: |A block of agar (10cm x 5cm x 3cm) with 0.1M NaOH and |1x 250mL
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Guidelines for Mathematics Laboratory in Schools Class X Central Board of Secondary Education Preet Vihar‚ Delhi – 110092. 1 2 1 . Introduction Taking into consideration the national aspirations and expectations reflected in the recommendations of the National Curriculum Framework developed by NCERT‚ the Central Board of Secondary Education had initiated a number of steps to make teaching and learning of mathematics at school stage activity-based and experimentation oriented
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the chord. Given‚ PR = 5 cm and OR = 12 cm PO 12 5 2 2 PO 144 25 PO 169 PO 13 PO = radius = 13 cm ∴ Diameter = 26 cm 5. Correct Answer: D As the cylinder is dripped vertically to half its height‚ therefore half the total surface area of the cylinder would be painted. www.topperlearning.com 1 CBSE IX | MATHEMATICS Sample Paper – 1 Solution 6. Correct Answer: A Let a be the lower limit of the class. Hence a + 8 is the upper limit of the class. Also‚ Upper limit lower limit
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