# Albert

Popular questions and responses by Albert-
## Physics

A train accelerates from the rest at the station A at a rate of 0.8 m/s2 for 25 s, the travels at constant velocity for 77.5 s before it comes to rest at the station B after period of retardation lasting 20 s. What is the distance between stations A and B,

*asked on April 14, 2015* -
## Chemistry

when 25.0 mL of a solution containing both Fe2+ and Fe3+ ions is titrated with 23.0 mL of 0.0200 M KMnO4 (in dilute sulfuric acid). As a result, all of the Fe2+ ions are oxidized to Fe3+ ions. Next, the solution is treated with Zn metal to convert all of

*asked on December 15, 2011* -
## Physics Help!

A skier wants to build a rope tow to pull herself up a ski hill that is inclined at 15 with the horizontal. Calculate the tension needed in the rope to give the skier's 54kg body a 1.2 m/s^2 acceleration.

*asked on January 4, 2018* -
## Chemistry

To what decimal place should each answer be rounded? and how many significant figures does the rounded answer have? a) 9cm + 2.8 cm= 11.8cm (unrounded) b) 0.135 atm + 0.6 atm= 0.735 atm (unrounded) PLEASE HELP

*asked on September 11, 2015* -
## math

9. which set of output values correctly completes the function table? y=6-x input (X) output (y) -2 ? -1 ? 3 ? ----------------------- 4,5,3 -8,-7,3 8,7,3 11. What is the function rule shown by the table? input(x) output(y) -2 -3 0 1 1 3 2 5

*asked on June 13, 2018* -
## Implicit differentiation calculus

PLEASE HELP , I DON'T UNDERSTAND find dy/dx by implicit differentiation a) xy + x^5y^2 + 3x^3 - 4 = 1 b) lny = cos x thank you

*asked on June 21, 2012* -
## science

find the gravitational force exerted by the sun on a 70 kg man located at the earth's equator a)at noon when the man is closest to the sun. b)at midnight when he is futherst from the sun. c)calculate the diferrence in gravitational acceleration due to the

*asked on January 21, 2016* -
## Chemistry Physics

How many grams of water at 20°C are necessary to change 800g of water at 90°C to 50°C?

*asked on November 5, 2014* -
## maths

A ship travels at a constant speed of 25 kilometers per hour (kph) in a straight line from port A located at position (xA, yA) = (−100,−100) to port B at (xB, yB) = (300, 100). (a) (i) Find the equation of the line of travel of the ship. (ii) Find the

*asked on May 9, 2011* -
## math

which values can be substituted for x to make the inequality x - 4 >0 true? choose all that apply A. 0 B. 3 C. 4 D. 18 my answer is 0 and 4 please check my answer's

*asked on June 13, 2018* -
## Math

When you solve the system shown by the elimination method, which statement is true? y + 3x = 10 −y − 3x = 10 A. You eliminate y; the sum of the coefficients of y is zero. Then, you can solve for x. B. There is no solution; x and y are eliminated and

*asked on January 5, 2016* -
## THEORY OF INTEREST

Suppose that a money market fund pays a nominal rate of interest of 8.7 percent convertible monthly. What is the equivalent nominal rate convertible quarterly?

*asked on September 30, 2014* -
## Chemistry

How do you distinguish between fluorene and acetanilide? Suggest methods other than melting point and chromatography.

*asked on March 28, 2013* -
## college physics

what is the force applied in the direction of the wire at a point attached to the patient in a traction system if the mass applied ius equal to 5kg.?

*asked on February 14, 2012* -
## accounting

What generally accepted Accounting Principle(s) dominate the issue of asset valuation?

*asked on October 18, 2011* -
## Chemistry

The reaction NO2(g) + NO2(g) → N2O4(g) is second order with a rate constant of 0.044 /M·s at a particular temperature and pressure. If the initial concentration of NO2(g) is 0.100 M, what is the concentration of NO2 after 20 minutes?

*asked on February 27, 2018* -
## Physics

A skier wants to build a rope tow to pull herself up a ski hill that is inclined at 15 with the horizontal. Calculate the tension needed in the rope to give the skier's 54kg body a 1.2 m/s^2 acceleration.

*asked on January 4, 2018* -
## Math

k such that 3 is the remainder when f(x)=x to the 4 power minus 4xcube minus 8xsquare minus 7x plus 1. Tapos which of the following binomial factor of 2xcube plus 5xsquared minus 10x plus 16.

*asked on October 1, 2017* -
## stat

Forty-nine items are randomly selected from a population of 500 items. The sample mean is 40 and the sample standard deviation 9. Develop a 99% confidence interval for the population mean

*asked on December 7, 2015* -
## Physics

A block initially at rest, slides down from the top of an inclined plane 30degrees above the horizontal. The plane is 100feet long and frictionless. what distance will it travel on a frictionless horizontal surface at the foot of the plane 6seconds after

*asked on January 12, 2015* -
## Chemistry

Please help me set up these problems. I have been staring at them for hours and I can't tell where I went wrong. Question: Consider the following reaction: CaCO3(s)→CaO(s)+CO2(g). Estimate ΔG∘ for this reaction at each of the following temperatures.

*asked on November 16, 2014* -
## theory of interest

1.Two investments are made at the same time. The first consists of investing 1550 dollars at a nominal rate of interest of 7.9 percent convertible semiannually. The second consists of investing 1450 dollars at a nominal rate of interest of 7.9 percent

*asked on October 25, 2014* -
## Economics

What are welfare payment or consumer?

*asked on July 23, 2014* -
## English Analysis

Reading The Stranger by the lovely Albert Camus. Just need help understanding this question: -After I listed some themes I explored, my teacher asks: "Given the themes you listed, are any conventions questioned based on the treatment of a given theme?

*asked on October 9, 2012* -
## maths

Choose the option that gives the solution of the initial-value problem dy dx=(1 + 2 cos2x^2)/y (y > 0), y= 1 when x = 0. Options A y = 1+ 2sin^2 x B y = (1 + 2 sin x)^2 C y = (4x + cos(2x))^2 D y = 4x + cos^2 x E y =sqrt(4x + cos(2x) F y =sqrt(1 + 4x +

*asked on May 11, 2011* -
## Geometry

The perimeter of a rectangle is 76 feet. If the width is doubled and the length is halved, the new rectangle will have a perimeter of 62 feet. Find the dimensions of the original rectangle. Define your variables.

*asked on March 8, 2010* -
## Maths

In A Geometric Sequence The 3rd Term Is 24 And The 5th Term Is 3. Write Down The First Four Terms In The Sequence.

*asked on February 11, 2020* -
## Mathmeta

How to select logical numbers for mark six?

*asked on June 10, 2019* -
## math

if the interest rate is 8.25% and you borrowed $5000 for 30 days. How much interest would you pay

*asked on May 19, 2019* -
## Life orientation

Critically discuss six ways in which individual,groups and broader of South African community can be influenced by humans rights violations

*asked on April 27, 2019* -
## Physics

what is refractive index in apperent depth

*asked on August 25, 2017* -
## Physics

g=4 pi (l/t square)

*asked on July 21, 2017* -
## math

The ticket prices for a movie are shown in the illustration. Receipts for one showing were $1,930 for an audience of 205 people. How many general admission tickets and how many senior citizen tickets were sold?

*asked on May 22, 2017* -
## Chemistry

What should the molar concentrations of benzoic acid and sodium benzoate be in a solution that is buffered at a pH of 4.75 and has a freezing point of -2.0 ∘C? (Assume complete dissociation of sodium benzoate and a density of 1.01 g/mL for the solution.)

*asked on March 29, 2017* -
## Specialist Mathematics

Need help with three proofs. Proof#1: Prove that |x+y| is less than or equal to |x|+|y| Proof#2: Prove that |x|-|y| is less than or equal to |x-y| Proof#3: Prove that |x+y+z| is less than or equal to |x|+|y|+|z|.

*asked on December 22, 2016* -
## Physics

Hello, I need some help with this physics problem. This was the only one I couldn't solve, and the teacher wouldn't help me because she wanted me to figure it out for myself, just like everyone else tried. (Although no one did) Here is the question: Type

*asked on November 1, 2016* -
## Math (calculus 3)

A football is thrown down the field by a quarterback from a height of 1 foot with an initial velocity of 40 feet per second at angle of pi/6 radians. If a receiver catches the ball downfield at a height of 1 foot above ground; a) How long was the ball in

*asked on September 28, 2016* -
## Math

A very large book has pages numbered from 1 to 11521. How many times is the digit 3 printed?

*asked on September 21, 2016* -
## Math

A wheel makes6 1/12 revolution per minute. If it rotates 45 minutes,how many revolutions does it make

*asked on April 9, 2016* -
## trigonometry

can someone help me prove the identities on this: 1- 1/2 sin2θ = sin^3θ + cos^3θ / sinθ + cosθ

*asked on January 21, 2016* -
## trigonometry

sina^2θcos^2θ= 1/8 (1-cos4θ)

*asked on January 21, 2016* -
## Math

Solve the system using substitution. 6x + y = 12 4x + 6y = −8 A. (2 1/2,3) B. (−2 1/2,−3) C. (2 1/2,−3) D. no solution I GOT B!

*asked on January 5, 2016* -
## Math

Solve the system using substitution. x = y − 6 y = 6 − 3x A. (0, 6) B. (6, 0) C. (0, −6) D. (−6, 0)

*asked on January 5, 2016* -
## Math

Solve the system using substitution. y = 4x − 5 y = 2x + 1 A. (−2, −3) B. (1, 3) C. (−2, −13) D. (3, 7)

*asked on January 5, 2016* -
## trigonometry

from a point 3 m above the water surface, the angle of elevation of the top of a certain tree is 30°40', while the angle of depression of its image is 65°10'. Find the height of the tree and its distance from the point of observation.

*asked on December 7, 2015* -
## Finance

Evans Technology has the following capital structure. Debt ............................................ 40% Common equity .......................... 60 The aftertax cost of debt is 6 percent, and the cost of common equity (in the form of retained earnings)

*asked on November 16, 2015* -
## math

convert 40.0m^3 to liters. note that 1mL = 1cm^3. can you show me how to do this problem?

*asked on September 10, 2015* -
## Chem

To what decimal place should each answer be rounded? and how many significant figures does the rounded answer have? a) 9cm + 2.8 cm= 11.8cm (unrounded) b) 0.135 atm + 0.6 atm= 0.735 atm (unrounded) can you show me how to do this?

*asked on September 10, 2015* -
## Algebra

The number of items on two grocery list differs by seven.the total number of items is 33 how many items on each list

*asked on August 13, 2015* -
## math

a metal cutter was accurate to the nearest micron.about how many pieces of metal 0.8188 centimeters long could the metal cutter cut from a 32.253 length of metal?

*asked on February 5, 2015* -
## physics

A ball of mass M1 moves with a velocity U1, collides perfectly elastically with a stationary ball of mass M2 . After the collision, M1 and M2 move with velocities V1 and V2 respectively. Show that : V1 =(M1-M2) / (M1 + M2 ) * U1 .

*asked on January 29, 2015* -
## english(4th grade)

Identify the infinitive and classify whether it is used as a subject, direct object, predicate noun, appositive, and object preposition. 1.Her only thought was to win. 2.My desire is to help. 3.Mrs. Cao loves to crochet. 4.They remember to say the rosary

*asked on December 27, 2014* -
## english (4th grade )

Identify the infinitive and classify whether it is used as a subject, direct object, predicate noun, appositive, and object preposition. 1.Her only thought was to win. 2.My desire is to help. 3.Mrs. Cao loves to crochet. 4.They remember to say the rosary

*asked on December 26, 2014* -
## Chemistry

I'm doing a redox potential/lead acid cell experiment and one of the questions that were asked was: -What were the identities of the gases you saw being produced at the + and - electrodes during the cell conditioning process? We used H2SO4 How do I go

*asked on December 3, 2014* -
## physics

Phisic

*asked on November 6, 2014* -
## TRIG WORD PROBLEMS

from 25 feet away from the base of a building, the angle of elevation from the ground to the top of a building is measured 38 degrees. how tall is the building. WHat i did was put 25 feet on the base of the triangle the angle measurement oppsite and the

*asked on November 4, 2014* -
## RIGHT TRIANGLE TRIG

a kite is being flown 150 yards of string. the kite has an angle of elevation with the ground 65 degrees. how high above the ground is the kite. I DON'T KNOW HOW TO SET UP THE PROBLEM

*asked on November 4, 2014* -
## physics

a turntable rotates about a fixed axis, making one revolution in 10s . the moment of inertia of the turntable about it's axis is 1200kg/m^2 . a man of mass 80kg , initially standing at the center of the turntable, runs out along a radius. what is the

*asked on October 17, 2014* -
## social studies

From the point of an environmentalist, which is probably the most significant argument against offshore drilling for oil?

*asked on June 10, 2014* -
## English art

Please, critique this critique: Very dramatic interactions in a world novel to me, with canine preening for competitive exhibition, following the emotions of the lead characters is exciting. This is no "Dog story", and Lassie wouldn't be noticed in the

*asked on February 9, 2014* -
## English

What is parallelism, please?

*asked on February 9, 2014* -
## algebra

A man and a woman's ages total 98. He is twice as old as she was when he was her age now. What are their ages?

*asked on February 7, 2014* -
## History

How Mali Build 0n Ghana Empire

*asked on November 7, 2013* -
## Math

3/4x^2 x 2x^2y x 23xy^3

*asked on November 7, 2013* -
## Polynomials

Can someone please help me get the sum difference and product of this problem I am so lost x^3+ 2x-5∶ x^4-x^3+ 3x^2- 2x+3

*asked on September 19, 2013* -
## finance

Suppose you pay $1000 into a savings account that pays 2% per year, compounded annually. How many years will would it take for the money in the account to double, to $2000? use "successive approximation."

*asked on September 17, 2013* -
## physics

Suppose the straight-line distance between New York and San Francisco is 4.4 106 m (neglecting the curvature of the earth). A UFO is flying between these two cities at a speed of 0.69c relative to the earth. What do the voyagers aboard the UFO measure for

*asked on July 8, 2013* -
## Chemistry

How do you differentiate between fluorene and acetanilide? Suggest procedures and steps involved other than melting point and chromatography.

*asked on April 1, 2013* -
## math

During an art contest at your school, you and a classmate each won blue ribbons for 1/3 of the pieces you entered in the contest. You won 2 blue ribbons and your classmate won 3 blue ribbons. Explain how this could be.

*asked on January 29, 2013* -
## ACT Math

Carlos goes to a local deli for lunch and orders a sandwich. He needs to choose a bread, a meat, a vegetable, a cheese and a source. How many sandwich combinations are possible? Assume Carlos always pick only one item from each category. Bread: Italian,

*asked on November 13, 2012* -
## Algebra

Please let me know if I answered these correctly. thank you, #2. Add: 3p^2 – 5p – 4 and 9p^2 + 10p – 2 A. 12p2 + 15p – 6 B. 12p2 + 5p – 2 C. 12p2 + 5p – 6 D. 12p2 + 15p – 2 answer D ________________________ #7. (3x^2 – 2x – 1)(x^2 + x +

*asked on August 11, 2012* -
## Calculus grade 12

find the slope of the tangent line to y^4 = 3x^2 - 2x at the point (1,1)

*asked on June 21, 2012* -
## Calculus grade 12

find dy/dx by implicit differentiation a) xy + x^5y^2 + 3x^3 - 4 = 1 b) lny = cos x thank you

*asked on June 21, 2012* -
## Calculus grade 12

hi i need help differentiating these.. 1. y = cos(3x^2 + 2x) 2. y = ln(3x^2 + 5) thank you

*asked on June 21, 2012* -
## math

$24 lft a 15 percent tip how much total

*asked on May 14, 2012* -
## chemistry

Can someone pleeeeeaaase explain Charle's law in a simple way.

*asked on May 14, 2012* -
## college physics

calculate the specific heat of 200g of substance whose temperature is 30 degree celcius if it is mixed with 200g of water heated in a 300g iron container at 100 degree celcius. the final temperature of the mixture is 98 degree celcius.

*asked on February 14, 2012* -
## college physics

calculate the specific heat of 200g of substance whose temperature is 30 degree celcius if it is mixed with 200g of water heated in a 300g iron container at 100 degree celcius. the final temperature of the mixture is 98 degree celcius.

*asked on February 14, 2012* -
## College Algebra

A rectangle field with area of 1,500,000 needs to be fenced. 2W+2L=5,000. solve for L and W

*asked on December 15, 2011* -
## trig

1.Ifg(x)=cos4x,find g'(pie/24). 2.Differentiate y=csc^2 pie*x

*asked on February 25, 2012* -
## Chemistry

calculate the energy associated with a photon whose wavelength is 14.5*10^-8cm.

*asked on October 31, 2011* -
## math

Estimate products of fractions. 2/9x26

*asked on September 20, 2011* -
## maths

f(x)=ln(e^x-e^-x), x>0 By applying in turn the Composite and Quotient Rules, find derivative and second derivative. Thanks.

*asked on May 17, 2011* -
## maths

The mean weight (1.0042kg)of the contents of samples of 30 bags of sugar has standard error 0.008kg. Choose the option that is closest to the probability, to three decimal places, that the mean weight of the contents of samples of 30 bags of sugar will be

*asked on May 17, 2011* -
## maths

Choose the THREE options that define sequences that do not converge. Options A P0 = 40, Pn+1 − Pn = 2.8 Pn (1− Pn/300) (n = 0,1,2, . . .) B P0 = 100, Pn+1 − Pn = 0.7Pn (1− Pn/480) (n = 0,1,2, . . .) C P0 = 250, Pn+1 − Pn = 2.4Pn (1− Pn/420) (n

*asked on May 17, 2011* -
## maths

The variation in a population is modelled by the recurrence relation (Jn+1 0.9257 0.0208) (Jn) + (0.014) (An+1 0.0661 0.9767) (An) (0.056) where Jn and An are the sizes, in millions, of the subpopulations of juveniles and adults, respectively, n years

*asked on May 17, 2011* -
## maths

The variation in a population is modelled by the recurrence relation (Jn+1 0.9257 0.0208) (Jn) + (0.014) (An+1 0.0661 0.9767) (An) (0.056) where Jn and An are the sizes, in millions, of the subpopulations of juveniles and adults, respectively, n years

*asked on May 16, 2011* -
## maths

Choose the THREE options that define sequences that do not converge. Options A P0 = 40, Pn+1 − Pn = 2.8 Pn (1− Pn/300) (n = 0,1,2, . . .) B P0 = 100, Pn+1 − Pn = 0.7Pn (1− Pn/480) (n = 0,1,2, . . .) C P0 = 250, Pn+1 − Pn = 2.4Pn (1− Pn/420) (n

*asked on May 16, 2011* -
## maths

The mean weight (1.0042kg)of the contents of samples of 30 bags of sugar has standard error 0.008kg. Choose the option that is closest to the probability, to three decimal places, that the mean weight of the contents of samples of 30 bags of sugar will be

*asked on May 16, 2011* -
## maths

f(x)=ln(e^x-e^-x), x>0 By applying in turn the Composite and Quotient Rules, find derivative and second derivative. Thanks.

*asked on May 16, 2011* -
## maths

f(x)=ln(e^x-e^-x), x>0 By applying in turn the Composite and Quotient Rules, find derivative and second derivative.

*asked on May 15, 2011* -
## maths

The mean weight (1.0042kg)of the contents of samples of 30 bags of sugar has standard error 0.008kg. Choose the option that is closest to the probability, to three decimal places, that the mean weight of the contents of samples of 30 bags of sugar will be

*asked on May 15, 2011* -
## maths

Choose the THREE options that define sequences that do not converge. Options A P0 = 40, Pn+1 − Pn = 2.8 Pn (1− Pn/300) (n = 0,1,2, . . .) B P0 = 100, Pn+1 − Pn = 0.7Pn (1− Pn/480) (n = 0,1,2, . . .) C P0 = 250, Pn+1 − Pn = 2.4Pn (1− Pn/420) (n

*asked on May 15, 2011* -
## maths

The variation in a population is modelled by the recurrence relation (Jn+1 0.9257 0.0208) (Jn) + (0.014) (An+1 0.0661 0.9767) (An) (0.056) where Jn and An are the sizes, in millions, of the subpopulations of juveniles and adults, respectively, n years

*asked on May 15, 2011* -
## maths

f(x)=ln(e^x-e^-x), x>0 By applying in turn the Composite and Quotient Rules, find derivative and second derivative. Thanks.

*asked on May 14, 2011* -
## maths

*asked on May 14, 2011* -
## maths

*asked on May 14, 2011* -
## maths

*asked on May 14, 2011* -
## maths

*asked on May 14, 2011* -
## maths

*asked on May 14, 2011*

## Pages

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