Daily Archives: November 26, 2019

56 posts

A 6.0-kg box moving at 3.0 m/s on a horizontal, frictionless surface runs into a light spring

A 6.0-kg box moving at 3.0 m/s on a horizontal, frictionless surface runs into a light spring

Leave a tip for good service: https://paypal.me/jjthetutor A 6.0-kg box moving at 3.0 m/s on a horizontal, frictionless surface runs into a light spring of force constant 75 N/cm. Use the work–energy theorem to find the maximum compression of the spring. Student Solution Manuals: https://amzn.to/2WZrFnD More help via http://jjthetutor.com Download my eBooks via http://payhip.com/jjthetutor, paperback…

Ice accelerating down an incline | Forces and Newton’s laws of motion | Physics | Khan Academy

Ice accelerating down an incline | Forces and Newton’s laws of motion | Physics | Khan Academy

Figuring out the acceleration of ice down a plane made of ice. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/physics/forces-newtons-laws/inclined-planes-friction/v/force-of-friction-keeping-the-block-stationary?utm_source=YT&utm_medium=Desc&utm_campaign=physics Missed the previous lesson? https://www.khanacademy.org/science/physics/forces-newtons-laws/inclined-planes-friction/v/inclined-plane-force-components?utm_source=YT&utm_medium=Desc&utm_campaign=physics Physics on Khan Academy: Physics is the study of the basic principles that govern the physical world around us. We’ll start by looking at motion itself. Then, we’ll learn…

Proof: The derivative of __ is __ | Advanced derivatives | AP Calculus AB | Khan Academy

Proof: The derivative of __ is __ | Advanced derivatives | AP Calculus AB | Khan Academy

Proving that the derivative of __ is __ using the definition of the derivative as a limit, and the definition of _ as a limit. Watch the next lesson: https://www.khanacademy.org/math/ap-calculus-ab/ab-derivatives-advanced/ab-adv-derivatives-opt-vids/v/proof-of-derivative-of-ln-x?utm_source=YT&utm_medium=Desc&utm_campaign=APCalculusAB Missed the previous lesson? https://www.khanacademy.org/math/ap-calculus-ab/ab-derivatives-advanced/ab-diff-log/v/derivative-log-properties?utm_source=YT&utm_medium=Desc&utm_campaign=APCalculusAB AP Calculus AB on Khan Academy: Bill Scott uses Khan Academy to teach AP Calculus at Phillips Academy in Andover,…

Converting decimals to fractions example 1 | Decimals | Pre-Algebra | Khan Academy

Converting decimals to fractions example 1 | Decimals | Pre-Algebra | Khan Academy

We’re practicing how to convert a lonely decimal into a happy fraction. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/decimals-pre-alg/decimal-to-fraction-pre-alg/e/converting_decimals_to_fractions_1?utm_source=YT&utm_medium=Desc&utm_campaign=PreAlgebra Watch the next lesson: https://www.khanacademy.org/math/pre-algebra/decimals-pre-alg/decimal-to-fraction-pre-alg/v/converting-decimals-to-fractions-1-ex-2?utm_source=YT&utm_medium=Desc&utm_campaign=PreAlgebra Missed the previous lesson? https://www.khanacademy.org/math/pre-algebra/decimals-pre-alg/decimal-to-fraction-pre-alg/v/decimals-and-fractions?utm_source=YT&utm_medium=Desc&utm_campaign=PreAlgebra Pre-Algebra on Khan Academy: No way, this isn’t your run of the mill arithmetic. This is Pre-algebra. You’re about to play with the professionals.…

Limit examples (part 3) | Limits | Differential Calculus | Khan Academy

Limit examples (part 3) | Limits | Differential Calculus | Khan Academy

More limit examples Watch the next lesson: https://www.khanacademy.org/math/differential-calculus/limits_topic/old-limits-tutorial/v/limit-examples-w-brain-malfunction-on-first-prob-part-4?utm_source=YT&utm_medium=Desc&utm_campaign=DifferentialCalculus Missed the previous lesson? https://www.khanacademy.org/math/differential-calculus/limits_topic/old-limits-tutorial/v/limit-examples-part-2?utm_source=YT&utm_medium=Desc&utm_campaign=DifferentialCalculus Differential calculus on Khan Academy: Limit introduction, squeeze theorem, and epsilon-delta definition of limits. About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of…

Linear approximation of a rational function | Derivative rules | AP Calculus AB | Khan Academy

Linear approximation of a rational function | Derivative rules | AP Calculus AB | Khan Academy

Sal finds a linear expression that approximates y=1/(x-1) around x=-1. This is done by finding the equation of the line tangent to the graph at x=-1, a process called “linear approximation.”. Watch the next lesson: https://www.khanacademy.org/math/ap-calculus-ab/ab-derivative-rules/ab-chain-rule/v/chain-rule-introduction?utm_source=YT&utm_medium=Desc&utm_campaign=APCalculusAB Missed the previous lesson? https://www.khanacademy.org/math/ap-calculus-ab/ab-derivative-rules/ab-rational-func-diff/v/rational-functions-differentiation?utm_source=YT&utm_medium=Desc&utm_campaign=APCalculusAB AP Calculus AB on Khan Academy: Bill Scott uses Khan Academy to teach AP…

1940 – Axis gains momentum in World War II  | The 20th century | World history | Khan Academy

1940 – Axis gains momentum in World War II | The 20th century | World history | Khan Academy

In this second video giving an overview of World War II, we see Germany and the Axis powers only continue to gain momentum in 1940. Watch the next lesson: https://www.khanacademy.org/humanities/world-history/euro-hist/wo/v/1941-axis-momentum-accelerates-in-ww2?utm_source=YT&utm_medium=Desc&utm_campaign=worldhistory Missed the previous lesson? https://www.khanacademy.org/humanities/world-history/euro-hist/wo/v/beginning-of-world-war-ii?utm_source=YT&utm_medium=Desc&utm_campaign=worldhistory World history on Khan Academy: From the earliest civilizations to the modern world, geography, religion, trade, and politics have bound…

Magnetic force between two currents going in the same direction | Khan Academy

Magnetic force between two currents going in the same direction | Khan Academy

Sal shows how to determine the magnetic force between two currents going in the same direction. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/physics/magnetic-forces-and-magnetic-fields/magnetic-field-current-carrying-wire/v/magnetism-8?utm_source=YT&utm_medium=Desc&utm_campaign=physics Missed the previous lesson? https://www.khanacademy.org/science/physics/magnetic-forces-and-magnetic-fields/magnetic-field-current-carrying-wire/v/magnetism-6-magnetic-field-due-to-current?utm_source=YT&utm_medium=Desc&utm_campaign=physics Physics on Khan Academy: Physics is the study of the basic principles that govern the physical world around us. We’ll start by looking at motion…

Compound-complex sentences | Syntax | Khan Academy

Compound-complex sentences | Syntax | Khan Academy

Compound-complex sentences are compound sentences with dependent or subordinate clauses added to them. Paige and Rosie explain how to spot and use them. Practice this yourself on Khan Academy right now www.khanacademy.org/syntax/e/complex-and-compound-complex-sentences/ Watch the next lesson: https://www.khanacademy.org/humanities/grammar/syntax/v/subject-verb-agreement-syntax-khan-academy Missed the previous lesson? watch here: https://www.khanacademy.org/humanities/grammar/syntax/v/complex-sentences-syntax-khan-academy Syntax on Khan Academy: Syntax is the ordering of language; it’s…

Supernova clarification | Stars, black holes and galaxies | Cosmology & Astronomy | Khan Academy

Supernova clarification | Stars, black holes and galaxies | Cosmology & Astronomy | Khan Academy

Supernova clarification. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/cosmology-and-astronomy/stellar-life-topic/stellar-life-death-tutorial/v/black-holes?utm_source=YT&utm_medium=Desc&utm_campaign=cosmologystronomy Missed the previous lesson? https://www.khanacademy.org/science/cosmology-and-astronomy/stellar-life-topic/stellar-life-death-tutorial/v/supernova-supernovae?utm_source=YT&utm_medium=Desc&utm_campaign=cosmologystronomy Cosmology & Astronomy on Khan Academy: The Earth is huge, but it is tiny compared to the Sun (which is super huge). But the Sun is tiny compared to the solar system which is tiny compared to the distance…

Discriminant for types of solutions for a quadratic | Algebra II | Khan Academy

Discriminant for types of solutions for a quadratic | Algebra II | Khan Academy

Discriminant for Types of Solutions for a Quadratic Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/algebra2/polynomial_and_rational/quad_formula_tutorial/e/solutions_to_quadratic_equations?utm_source=YT&utm_medium=Desc&utm_campaign=AlgebraII Watch the next lesson: https://www.khanacademy.org/math/algebra2/polynomial_and_rational/quad_ineq/v/quadratic-inequalities?utm_source=YT&utm_medium=Desc&utm_campaign=AlgebraII Missed the previous lesson? https://www.khanacademy.org/math/algebra2/polynomial_and_rational/quad_formula_tutorial/v/discriminant-of-quadratic-equations?utm_source=YT&utm_medium=Desc&utm_campaign=AlgebraII Algebra II on Khan Academy: Your studies in algebra 1 have built a solid foundation from which you can explore linear equations, inequalities, and functions. In algebra 2…

Fertilization terminology: gametes, zygotes, haploid, diploid | MCAT | Khan Academy

Fertilization terminology: gametes, zygotes, haploid, diploid | MCAT | Khan Academy

How haploid gametes (sperm and egg cells) combine to form a diploid zygote with two sets of chromosomes. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/test-prep/mcat/cells/cellular-division/v/somatic-germ-cells?utm_source=YT&utm_medium=Desc&utm_campaign=mcat Missed the previous lesson? https://www.khanacademy.org/test-prep/mcat/cells/cellular-division/v/loss-of-cell-cycle-control-in-cancer?utm_source=YT&utm_medium=Desc&utm_campaign=mcat MCAT on Khan Academy: Go ahead and practice some passage-based questions! About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a…

How to classify numbers | Numbers and operations | 8th grade | Khan Academy

How to classify numbers | Numbers and operations | 8th grade | Khan Academy

Learn how to classify numbers as whole numbers, integers, rational numbers, and irrational numbers. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-numbers-operations/cc-8th-irrational-numbers/e/identifying-whole–integer–and-rational-numbers?utm_source=YT&utm_medium=Desc&utm_campaign=8thgrade Watch the next lesson: https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-numbers-operations/cc-8th-approximating-irrational-numbers/v/approximating-square-roots-2?utm_source=YT&utm_medium=Desc&utm_campaign=8thgrade Missed the previous lesson? https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-numbers-operations/cc-8th-irrational-numbers/v/recognizing-irrational-numbers?utm_source=YT&utm_medium=Desc&utm_campaign=8thgrade 8th grade on Khan Academy: 8th grade is all about tackling the meat of algebra and getting exposure to some of the…

Absolute value smallest to biggest | Pre-Algebra | Khan Academy

Absolute value smallest to biggest | Pre-Algebra | Khan Academy

Not only will we identify several absolute values in this example, but we will order them from smallest to largest. Content provided by The NROC Project – ©Monterey Institute for Technology and Education Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/arithmetic/absolute-value/abs_value_tutorial/e/absolute_value?utm_source=YT&utm_medium=Desc&utm_campaign=PreAlgebra Watch the next lesson: https://www.khanacademy.org/math/arithmetic/absolute-value/abs_value_tutorial/v/absolute-value-of-integers?utm_source=YT&utm_medium=Desc&utm_campaign=PreAlgebra Missed the previous lesson? https://www.khanacademy.org/math/arithmetic/absolute-value/abs_value_tutorial/v/absolute-value-and-number-lines?utm_source=YT&utm_medium=Desc&utm_campaign=PreAlgebra Pre-Algebra on Khan…

Mitosis | Cells | MCAT | Khan Academy

Mitosis | Cells | MCAT | Khan Academy

Mitosis is how cells divide! Learn what happens in all the phases of mitosis: prophase, metaphase, anaphase, and telophase. Watch the next lesson: https://www.khanacademy.org/test-prep/mcat/cells/cellular-division/v/comparing-mitosis-and-meiosis?utm_source=YT&utm_medium=Desc&utm_campaign=mcat Missed the previous lesson? https://www.khanacademy.org/test-prep/mcat/cells/cellular-division/v/interphase?utm_source=YT&utm_medium=Desc&utm_campaign=mcat MCAT on Khan Academy: Go ahead and practice some passage-based questions! About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard…

Solving for F in terms of C | Linear equations | Algebra I | Khan Academy

Solving for F in terms of C | Linear equations | Algebra I | Khan Academy

Solving for a Variable 2 Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/algebra/solving-linear-equations-and-inequalities/solving_for_variable/e/solving_for_a_variable?utm_source=YT&utm_medium=Desc&utm_campaign=AlgebraI Watch the next lesson: https://www.khanacademy.org/math/algebra/solving-linear-equations-and-inequalities/solving_for_variable/v/example-of-solving-for-a-variable?utm_source=YT&utm_medium=Desc&utm_campaign=AlgebraI Missed the previous lesson? https://www.khanacademy.org/math/algebra/solving-linear-equations-and-inequalities/solving_for_variable/v/solving-for-a-variable?utm_source=YT&utm_medium=Desc&utm_campaign=AlgebraI Algebra I on Khan Academy: Algebra is the language through which we describe patterns. Think of it as a shorthand, of sorts. As opposed to having to do something over and…

Stokes example part 1 | Multivariable Calculus | Khan Academy

Stokes example part 1 | Multivariable Calculus | Khan Academy

Starting to apply Stokes theorem to solve a line integral Watch the next lesson: https://www.khanacademy.org/math/multivariable-calculus/surface-integrals/stokes_theorem/v/part-2-parameterizing-the-surface?utm_source=YT&utm_medium=Desc&utm_campaign=MultivariableCalculus Missed the previous lesson? https://www.khanacademy.org/math/multivariable-calculus/surface-integrals/stokes_theorem/v/conditions-for-stokes-theorem?utm_source=YT&utm_medium=Desc&utm_campaign=MultivariableCalculus Multivariable Calculus on Khan Academy: Think calculus. Then think algebra II and working with two variables in a single equation. Now generalize and combine these two mathematical concepts, and you begin to see some of…

Format changes to the new SAT | Tips & Planning | New SAT | Khan Academy

Format changes to the new SAT | Tips & Planning | New SAT | Khan Academy

In March 2016, the SAT is switching to a new format. Sal covers how the exam is changing. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-tips-planning/new-sat-about-sat/v/sat-differences-of-new-sat?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT Missed the previous lesson? https://www.khanacademy.org/test-prep/new-sat/new-sat-tips-planning/new-sat-about-sat/v/walk-through-sat-practice-platform?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT New SAT (starting March 2016) on Khan Academy: Practice all of the skills you’ll need for the new SAT. We also have four official practice exams from…

Marginal cost and average total cost | Microeconomics | Khan Academy

Marginal cost and average total cost | Microeconomics | Khan Academy

Looking at marginal and average total cost in the context of a juice business Watch the next lesson: https://www.khanacademy.org/economics-finance-domain/microeconomics/firm-economic-profit/average-costs-margin-rev/v/marginal-revenue-and-marginal-cost?utm_source=YT&utm_medium=Desc&utm_campaign=microeconomics Missed the previous lesson? https://www.khanacademy.org/economics-finance-domain/microeconomics/firm-economic-profit/economic-profit-tutorial/v/depreciation-and-opportunity-cost-of-capital?utm_source=YT&utm_medium=Desc&utm_campaign=microeconomics Microeconomics on Khan Academy: Topics covered in a traditional college level introductory microeconomics course About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower…

Naming ions and ionic compounds | Atoms, compounds, and ions | Chemistry | Khan Academy

Naming ions and ionic compounds | Atoms, compounds, and ions | Chemistry | Khan Academy

Naming cations, anions, and simple ionic compounds such as potassium chloride. View more lessons or practice this subject at https://www.khanacademy.org/science/chemistry/atomic-structure-and-properties/introduction-to-compounds/v/naming-ions-and-ionic-compounds?utm_source=youtube&utm_medium=desc&utm_campaign=chemistry Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology,…

Oligopolies, duopolies, collusion, and cartels | Microeconomics | Khan Academy

Oligopolies, duopolies, collusion, and cartels | Microeconomics | Khan Academy

Thinking about when oligopolies behave more like monopolies or perfect competitors Watch the next lesson: https://www.khanacademy.org/economics-finance-domain/microeconomics/nash-equilibrium-tutorial/nash-eq-tutorial/v/prisoners-dilemma-and-nash-equilibrium?utm_source=YT&utm_medium=Desc&utm_campaign=microeconomics Missed the previous lesson? https://www.khanacademy.org/economics-finance-domain/microeconomics/perfect-competition-topic/monopolistic-competition-oligop/v/monopolistic-competition-and-economic-profit?utm_source=YT&utm_medium=Desc&utm_campaign=microeconomics Microeconomics on Khan Academy: Topics covered in a traditional college level introductory microeconomics course About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study…

Worked example: sequence convergence/divergence | Series | AP Calculus BC | Khan Academy

Worked example: sequence convergence/divergence | Series | AP Calculus BC | Khan Academy

How can we tell if a sequence converges or diverges? See Sal in action, determining the convergence/divergence of several sequences. Created by Sal Khan. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/ap-calculus-bc/bc-series/bc-inf-sequences/e/convergence-and-divergence-of-sequences?utm_source=YT&utm_medium=Desc&utm_campaign=APCalculusBC Watch the next lesson: https://www.khanacademy.org/math/ap-calculus-bc/bc-series/bc-finite-geo-series/v/series-as-sum-of-sequence?utm_source=YT&utm_medium=Desc&utm_campaign=APCalculusBC Missed the previous lesson? https://www.khanacademy.org/math/ap-calculus-bc/bc-series/bc-inf-sequences/v/convergent-and-divergent-sequences?utm_source=YT&utm_medium=Desc&utm_campaign=APCalculusBC AP Calculus BC on Khan Academy: Learn AP Calculus BC – everything…

Option expiration and price | Finance & Capital Markets | Khan Academy

Option expiration and price | Finance & Capital Markets | Khan Academy

Option Expiration and Price. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/economics-finance-domain/core-finance/derivative-securities/forward-futures-contracts/v/forward-contract-introduction?utm_source=YT&utm_medium=Desc&utm_campaign=financeandcapitalmarkets Missed the previous lesson? Watch here: https://www.khanacademy.org/economics-finance-domain/core-finance/derivative-securities/put-call-options/v/actual-option-quotes?utm_source=YT&utm_medium=Desc&utm_campaign=financeandcapitalmarkets Finance and capital markets on Khan Academy: Options allow investors and speculators to hedge downside (or upside). It allows them to trade on a belief that prices will change a lot–just not clear about direction.…