Barry

A skipper on a boat notices wave crests passing his anchor chain every 9 s. He estimates the distance between wave crests to be 15 m. He also correctly estimates the speed of the waves. What is this speed? Wavelenght* frequency= wave speed remember that f...

18 years ago

A bat flying in a cave emits a sound and receives its echo 0.5 s later. How far away is the cave wall? I answered this below. If you cant find it, search on bat flying in the search window above.

18 years ago

Here is my question: Consider the bending of light by the gravitation of the Sun as described by Newtonian physics. Light of frequency f passes at a distance d from the center of the Sun, which has a mass M. Show that the bending angle of the light is pro...

17 years ago

What is the rhyme scheme, meter, and stanza form for the poem "The Lamb" by William Blake? The Lamb Little Lamb, who made thee? Dost thou know who made thee? Gave thee life, and bid thee feed By the stream and o'er the mead; Gave thee clothing of delight,...

17 years ago

Horse Country Living publishes a monthly magazine for which a 12-month subscription costs $30. All subscriptions require payment of the full $30 in advance. On August 1, 2008, the balance in the Subscriptions Received in Advance account was $40,500. Durin...

16 years ago

She and mom got to the Dock late.

15 years ago

trying to Capitalize the proper nouns in the sentence

15 years ago

The dock is on Fish Lane. CAPITALIZE the proper nouns in the sentence.

15 years ago

Which sounds better my brother knows more about technology than me or I

15 years ago

if yo have three words friend, things & might which word has the long i sound and which word can you get by adding a sound to in? a tin,b hid c find

15 years ago

How much pressure is exerted by a 5000 pound moving vehicle vehicle (hehicle is 6' x 12')?

14 years ago

If the principal P = $900, the rate r = 4 1/2, and time t = 1 year, find the following: What is the amount of interest? What is the future value?

14 years ago

A prism, made of glass of refractive index 1.50, has two plane faces at an angle 33 to each other. A ray of light enters the glass from one side perpendicular to that face and emerges through the other. Part A: As the ray enters the glass, what is its ang...

13 years ago

A large fish tank is filled with water (of refractive index 1.33). One side of the tank is made of a parallel-sided piece of glass. A ray of light strikes the glass from the outside at an angle of incidence of 48. Estimate the angle through which this ray...

13 years ago

A submerged scuba diver looks up towards the calm water of a lake and notes that the Sun appears to be 20 from the vertical. The diver's friend, standing on the shore of the lake, is also looking at the Sun. At what angle from the vertical does the diver'...

13 years ago

Laser light with a wavelength = 665 illuminates a pair of slits at normal incidence. What slit separation will produce first-order maxima (i.e. m=1) at angles of 8 from the incident (or straight through) direction? Remember, 1 nm = m. Express your answer...

13 years ago

A ball was thrown straight up at 26.2 m/s then caught at the same place it was released. How many seconds was it in the air?

13 years ago

A piece plywood 24 inches wide is cut into strips 2 and a half inches wide, how many strips of this with can be cut. Please help,7th grade.

13 years ago

I have a diagram of an occupied building space within a larger building represented by 49 equal squares but no linear measures for the sides. The space is 120,000 sq ft. how can i estimate the lengths and widths of the floor space with just this informati...

12 years ago

A pot contains 6 liters of brine at a concentration of 120g/l. How many liters of the water should be boiled off so that concentration of the brine is 200g/l.

12 years ago

A manufacturer of soft-drinks advertises that their orange soda as "naturally flavored," although it contains only 5% orange juice. A new federal regulation stipulates that to be called "natural" a drink must contain at least 10% fruit juice. How much pur...

12 years ago

4x4+4x4+4-4x4=?

12 years ago

how to balence an equasion

11 years ago

At time t = 0, a projectile is launched from ground level. At t = 2.00 s, it is displaced d = 53 m horizontally and h = 54 m vertically above the launch point. What are the (a) horizontal and (b) vertical components of the initial velocity of the projecti...

10 years ago

find the exact value cos (-5 pi/ 12)

10 years ago

If a car has a constant acceleration of 4 m/s², starting from rest, how far has it travelled by the time it reaches the speed of 40 m/s?

10 years ago

Assume the brakes of an automobile produce a constant deceleration of k ft/sec^2. Determine what k must be to bring an automobile traveling 60 mph to a rest in a distance of 100 ft from the point where breaks are applied? With the same k, how far would a...

10 years ago

The electric field E at a distance r from a point field is E =K/r^2 where k is a constant. Find an expression for the instantaneous rate of change of the electric field with respect to r.

10 years ago

An architect is designing a rectangular building in which the front wall costs twice as much per linear metre as the other 3 walls. The building is to cover 1350 m2. What dimensions must it have so that the costs of the walls is a minimum? write a formula...

10 years ago

I don't understand factoring. One of my homework questions asks for that. The question is "The area of a rectangular garden is given by the trinomial x to the 2nd power plus x -42. What are the possible dimensions of the rectangle? Use factoring.

10 years ago

Calculate the resultant of force of 200 N due west and a force of 90 N at 60 degree NW

9 years ago

Please help don't understand how to solve it. 3xy-6x+2y^2 dx/dt=-6 x=2 y=-3 thank you

9 years ago

There is an outcropping of ice with a large drop to a slope below. A 100kg piece of ice breaks off with a 60kg person on top of it, and falls o the slope below. The piece of ice slides down the slope to the bottom and onto a horizontal portion. It slides...

9 years ago

A paper cone has a base diameter of 8cm and a height of 3cm a. Calculate the volume of the cone in term of pie b. Calculate the curve surface area of the cone

9 years ago

Part of the road is to be on a parabolic curve given by a function of the form y = ax^2 + bx + c where x and y are local co-ordinates. The road alignment must pass through the following 3 points:- x = 150m y = 190.650m x = 300m y = 611.450m x = 450m y = 8...

8 years ago

I have completed 6 questions but after 2 hours still cannot do these 4 questions. Please help 1) Jane is playing a game of Monopoly, if she throws six on her next turn she will land on community chest. If she throws eight she will land on Mayfair with a h...

8 years ago

Please help. I completed 1-6 but these 4 are hard; the wording confusing. 1) Jane is playing a game of Monopoly, if she throws six on her next turn she will land on community chest. If she throws eight she will land on Mayfair with a hotel (owned by anoth...

8 years ago

Okay, really I just need to know if this is going to be division, multiplication, subtraction or addition. Damon's town received 12.3 inches of rain during a 24-hour period. First, estimate the amount of rain that fell per hour. Then, find the exact amoun...

6 years ago

Which three parts of this excerpt from F. Scott Fitzgerald's "Winter Dreams" reflect Dexter’s final disillusionment?

6 years ago

A piece of gold-aluminium alloy weighs 49N when suspended from a spring balance and submerged in water it weighs 39.2N what is the weight of Gold in the alloy if the specific gravity of gold is 19.3 and aluminium is 2.5?

5 years ago

Write a sine function that has an amplitude of 4, period of 3π, and midline y = -3

4 years ago

You are driving 60 mph and it takes you 20 minutes to get to the mall. How many miles away from the mall do you live?

4 years ago

The largest fish in the tank at the base of the waterfall is 1^1/4 feet long. If the height of waterfall is 28 times the length of the largest fish and 7 times the height of the woman observing the fish at the base of the waterfall, how tall is the woman?

4 years ago

A microscope produces an upright image that is 0.5 cm high from an object that is 2 mm high. What is the magnification?

3 years ago

a) .0225 b) =1-P(x=0)=.0445 c) I do not know.

16 years ago

She and mon got to the Dock late.

15 years ago

How can we answer this question in that section 1 and2

14 years ago

I don't know how to calculate it, that's why I was looking for help

13 years ago

Hi Hi Hi Hi

12 years ago

Bye Bye Bye Bye

12 years ago

If I am annoying then tell me to stop. To tell me to stop you have to search my name in the right box that says search. P.s. it's right above the member login. Then click my name and annoy me to tell me to stop!

12 years ago

If I am annoying then tell me to stop. To tell me to stop you have to search my name in the right box that says search. P.s. it's right above the member login. Then click my name and annoy me to tell me to stop!

12 years ago

Wow. You have a lot of posts for your question Jocelyn

12 years ago

Sorry if I spelled your name wrong. If you do not care it would be some good news joceyln

12 years ago

6.34 x 10 to the fifth power

12 years ago

Actually, to do it the way he did would be wrong all together, because you would have to foil the (1+h/re)^2... you would have to multiply bothe sides by (1+h/re)^2 first... giving you: GMe-GMe=.007(1+h/re)^2 Obviously, GMe-GMe would give you zero... crea...

12 years ago

which it's not at all... if you start with g=GMe/re^2 then the difference in the two gravitys would be: (GMe/re^2)-(GMe/(h-re)^2=.007 to get like sides here, start by factoring out a GME... leaving you with GMe(1/re^2 - 1/(h-re)^2)=.007 divide both sides...

12 years ago

WAIT!!!!! i did h-r instead of h+r... therefore rework the steps with h+re instead of h-re..... sorry

12 years ago

1/13

11 years ago

log(1/4) = (3x+5)log8 log0.25/log8 = 3x+5 -2/3 = 3x+5 x= -17/9

11 years ago

log(base 3) x*(x-80)=4 3^4 = x(x-80) 81 = x^2 - 80 quadratic equation x= -1(rejected) or 81 x= 81 log properties used= log(base a)b=k a^k=b hope it helps :)

11 years ago

each side of the new area of the garden = 13 since 13x13 = 169 (side x side = area of square) so 13-9 =4m Therefore, 4m should be the answer

11 years ago

Dear Mandy, Here is the solution log2 0.45 = log2 (9/20) = log2 9 - log2 20 = 2log2 3 - log2 (4x5) = 2h- (log2 4 + log2 5) = 2h-(2+k) = 2h-2-k Hope this helps

11 years ago

3/ (6+5+4+3) = 1/6

11 years ago

Dear Abdulhafiz the no of mole of the 50ml of ph3 solution= (1x10^-3)x (50/1000) = 5x10^-5 the number of moles in the 50ml of ph5 solution= (1x10^-5) x (50/1000) = 5x10^-7 Total no of moles in the solution = 5x10^-5 + 5x10^-7 = 5.05x10^-5 The molarity of...

11 years ago

Dear Brett, molar mass of the HNO3= 1+14+16x3 =63 number of moles of the HNO3 produced in the reaction = 7.5/63 = 0.119 According to the equation provided 3 moles of NO2 will produce 2 moles of HNO3 Thus,number of moles of NO2 required= 0.119/2x3 = 0.179...

11 years ago

Dear Veronica, number of moles of HNO3 used= 0.602x(23.4/1000) = 0.014 number of mol of Cu used= 0.014/8x3 =5.28255x10^-3 mass of the Cu involved in the reaction = 5.28255x10^-3 x 63.5 = 0.33544g %by mass of Cu = 0.33544/0.411 x 100% = 81.6%

11 years ago

Dear hifsa still remember there is a formula Molarity= mol/dm cube so ........ 0.5= mole/ (1.25/1000) number of mole= 6.25x10^-4

11 years ago

Dear Sally, Here is the balanced equation HCL(aq) + NAOH(aq)---- NACL(s)+ H20(l) Number of moles in the NAOH(aq)= 40/(23+16+1) =1 as 1 mole of HCL will react with 1 mole of the Naoh solution number of mole of HCL required= 1 Still remember that there is a...

11 years ago

Dear Sally, as I have replied you before, I am not sure whether you have checked HCL(aq) + NAOH(aq)---- NACL(s)+ H20(l) Number of moles in the NAOH(aq)= 40/(23+16+1) =1 as 1 mole of HCL will react with 1 mole of the Naoh solution number of mole of HCL req...

11 years ago

The largest share is 650x(6/13) = 300

11 years ago

The amount of petrol required for each Km = 18/90 =0.2L The amount of petrol needed for 200km =0.2x200 =40L

11 years ago

Dear marie, I guess there is no AlO3 existing So do you actually mean aluminium oxide (Al2O3) The balanced equation is 3OH- + AL3+ -------> Al(OH)3 mol of aluminium oxide needed= 98.1 as 1 mole of aluminium oxide required 3 moles of sodium hydroxide to re...

11 years ago

Dear akhmal, mol of sucrose used= 1/(12x12 + 22 + 11X16) = 2.92x10^-3 as 1 mole of sucrose will produce 12 moles of Co2 mol of CO2 produced= (2.92x10^-3)X 12 = 0.035 grams of CO2 produced = 0.035 X (12+32) = 1.54g as 1 mole of sucrose will react with 12 m...

11 years ago

I= PRT Simple interest = 280 Nigerian naira X 2.5 X 0.03 = 21 Nigerian naira

11 years ago

Dear shashank, The chemical formula of FeSo4.7H2O = 55.8+ 32.1+ 16x4 + 7x18 = 277.9 The percentage of water of crystallization= = (7x18)/ 277.9 x 100% = 45.34%

11 years ago

Dear High, The amount that you are going to get =1000 x (1+(0.08/4))^(4x7) =1741.024 For the interest that you are going to get= 1741.024-1000 = 741.024

11 years ago

Dear Marcus, The answer is 1/(2x^9y^3) since [-10x13y^12]^0 = 1 as there is a rule <y^0 = 1> And the denominator cannot be further simply Hope it helps!

11 years ago

Dear Ann, 3.88 = 3.74 + log (x/0.1) 0.14 = log (x/0.1) 10^(0.14) = x/0.1 x = 1.38 x 0.1 x= 0.138 These are the calculation steps. I suppose the answer is 0.138 instead of 0.137. Ann,do you mind showing your calculation steps so I can know what is your mis...

11 years ago

Dear Kyle, the equation of circle let (h,k) be the center of the circle let the radius be r then the equation of circle will be (x-h)^2 + (y-k)^2 = r^2 so according to your equation of circle given the center point= (-5,7)

11 years ago

Dear Kyle, Sub (a,3) into the equation 5x + y = 8 5a + 3 = 8 5a = 5 a = 1 Hope it helps! wishing you the best of luck, Barry

11 years ago

Dear sharon, the first equation y = -7x - 9 slope= -7 y-intercept= -9 the second equation -3y = 21x + 7 y = -7x -(7/3) slope= -7 y-intercept= -(7/3) To determine whether the two lines are perpendicular slope of equation 1 X slope of equation 2 must be -1....

11 years ago

Hi! the question is ¡Ô(4x+1) + ¡Ô(x+1) = 2 Square both sides (¡Ô(4x+1) + ¡Ô(x+1))^2 = 2^2 still remember the identity (a+b)^2 = a^2 + 2ab + b^2 let ¡Ô(4x+1) be a ¡Ô(x+1) be b as a^2 + 2ab + b^2 we can derived the equation 4x+1 + 2¡Ô(4x^2+13x+3) + x+3 = 4

11 years ago

Dear sharon, 840 x 0.02 = 16.8(decimal number) 16(integer) Hope it helps! wishing you the best of luck Barry

11 years ago

Dear Roberta, the answer is D (1/2)(10t) =50,000 (10t) =50,000 /(1/2) 10t= 100000 t = 10000 Hope it helps! Wishing you the best of luck Barry

11 years ago

Dear Roberta, Let the number of people be y 100 + 20y = 25 + 25 y 75 = 5y y = 15 So the answer should be B Hope it helps! Wishing you the best of luck, Barry

11 years ago

Dear Roberta, the answer should be D recall the identity (a-b)^2 = a^2 - 2ab + b^2 Hope it helps Wishing you the best of luck barry

11 years ago

5/18

9 years ago

Assume x and y are functions of t, Evaluate dy/dt, 3xy-6x+2y^2 dx/dt=-6 x=2 y=-3 dy/dt

9 years ago

One ppm is one millionth of a gram or in simpler terms, 10^6.

8 years ago

1.1

8 years ago

Scientifically if the moon spun on the same rotational period as earth we would typically see the different parts of the moon

7 years ago

Am be

7 years ago

I suspect the questioner is asking whether Farmer Brown farms, or farmer Brown farms. See the difference? If the farmer Mr Brown is generally known as Farmer Brown, the word farmer has been elevated to a nominative category unique to Mr Brown and thus asc...

7 years ago

Thank you!

6 years ago

Okay, I know I'm late, but I just wanted to do this anyways. Here's what I got: 1. Things were done in the wars of by the Greeks, in the Romanist. 2. She was taught by the sailors Greek sword fight. 3. From bright to the queen of the wild beast of the poe...

6 years ago

The answers for Global Politics and Economics are 1: B 2: D 3: C 4: B So Camera and Harley's answers are correct. I don't know why Martha's would have had different answers, but for anyone in INCA, these are right.

6 years ago

My family members always say that I am wasting my time here at net, except I know I am getting familiarity everyday by reading thes fastidious articles or reviews. fodboldtrøjer CharlesMc fodboldtrøjer LindseyLy

6 years ago

So, it's 28 * ( 1.2) = 35 + 7 = 42 ft so, 42 = 7h h = 6 or is it the answer you provided?

4 years ago

So what’s the answer?

3 years ago