Gradient vectors - Study guides, Class notes & Summaries

Pure Maths A Level Questions and Answers 100% Pass Gradient y2-y1/x2-x1 Length of a line sqrt((x2-x1)^2+(y2-y1)^2) Midpoint (x1+x2/2, y1+y2/2) How do you know if two lines are perpendicular? When you multiply the gradients together they should equal -1. The general rule is perpendicular = -1/m. Or you could use Pythagoras to show there is a right angle How do you know if two lines are parallel? The gradients should be the same What should you always remember when finding the square roots? T...

1. 1.1 Physical quantities b)(1) make reasonable estimate of Fre- quency Of Audible Sound Wave: 2. 1.1 Physical quantities b)(2) make reasonable estimate of The Wavelength, in nm, of Ultraviolet Radia- tion: 3. 1.1 Physical quantities b)(3) make reasonable estimate of The Mass Of The Plastic 30cm Ruler: 4. 1.1 Physical quantities b)(4) make reasonable estimate of Den- sity Of Air At Atmospheric 5. 1.1 Physical quantities b)(5) make reasonable estimate...

1. Gradient y2-y1/x2-x1 2. Length of a line sqrt((x2-x1)^2+(y2-y1)^2) 3. Midpoint (x1+x2/2, y1+y2/2) 4. How do you know if two lines are perpendic- ular? When you multiply the gra- dients together they should equal -1. The general rule is perpendicular = -1/m. Or you could use Pythagoras to show there is a right angle 5. How do you know if two lines are parallel? The gradients should be the same 6. What should you always remember when finding the square roots? The answer cou...

1. How are drugs sorted into therapeutic groups and classes? A. first by the conditions that they are used to treat. and then by their mechanisms of action B. first by their mechanisms of action. and then by their therapeutic effects C. first by their side effects. and then by their therapeutic effects D. first by their toxicity. and then by their effectiveness 2. Bone marrow transplants... A. require that the patient first undergo chemotherapy or radiation to kill the diseased...

Edexcel A Level Maths (A+ Graded 100% Verified) Cosine Rule - Know 2 sides, and the angle in between. You want the missing side. ANS: a² = b² + c² - 2bcCosA Cosine Rule - Know 3 sides. You want an angle. ANS: Cos A = (b² + c² - a²) ÷ 2bc Sine Rule - Know 2 angles and a side. You want the missing side. ANS: (a ÷ SinA) = (b ÷ SinB) = (c ÷ SinC) Sine Rule - Know 2 sides and an angle. You want a missing angle. ANS: (Sin A ÷ a) = (Sin B ÷ b) = (Sin C ÷ c) Midpoint of a...

Math 475: Partial Differential Equations Shereen Elaidi Fall 2019 Term Contents 1 Introduction 2 1.1 Domains and Boundary Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.1.1 What are the main boundary conditions? . . . . . . . . . . . . . . . . . . . . . 3 1.2 Classification of PDEs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Diffusion 4 2.1 Derivation and Setting Up (n = 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

1. Gradient y2-y1/x2-x1 2. Length of a line sqrt((x2-x1)^2+(y2-y1)^2) 3. Midpoint (x1+x2/2, y1+y2/2) 4. How do you know if two lines are perpendic- ular? When you multiply the gra- dients together they should equal -1. The general rule is perpendicular = -1/m. Or you could use Pythagoras to show there is a right angle 5. How do you know if two lines are parallel? The gradients should be the same 6. What should you always remember when finding the square roots? The answer cou...

1. Order of a matrix Number of rows by number of columns 2. Square matrix Matrix of order NxN 3. Leading diagonal Diagonal of matrix from top left to bottom right 4. Conditions for two matrices to be equal - must have same order - each element in one matrix must be equal to the corresponding ele- ment in the other 5. Matrices which you can't add are... non-conformable for addition 6. Matrices which you can't multiply are... non-conformable for multiplication 7. Matrix...

What kind of test is depicted by a stress-strain diagram? - answer-tensile test What term is used for the ratio of stress to strain below the proportional limit? - answer-Young's modulus What does the impact test measure? - answer-toughness What is true regarding the ductile-to-brittle transition temperature? - answer-It is important for structures used in cold environments; It is the temperature at which 20 J of energy causes failure in a Charpy V-notch specimen of standard dimensions...

1. How are drugs sorted into therapeutic groups and classes? A. first by the conditions that they are used to treat. and then by their mechanisms of action B. first by their mechanisms of action. and then by their therapeutic effects C. first by their side effects. and then by their therapeutic effects D. first by their toxicity. and then by their effectiveness 2. Bone marrow transplants... A. require that the patient first undergo chemotherapy or radiation to kill the diseased...