# Posts by Nelson

Total # Posts: 107

**math**

A 200g alloy is made of copper and zinc. the number of copper atoms is 3 times that of zinc, a)calculate the number of copper and zinc atoms. b)calculate the weight of copper and zinc in the alloy. so for a) can i assume that the mol ratio is cu:zn = 3:1? if so, i solved it ...

** Chemistry**

(1)Make 500 ML of 4N H3PO4. How many grams will be needed? (2) In a titration procedure, 20mL of 2N solution were required to titrate 5mL of an unknown solution. What is the normality of the solution? (3) How much of a 0.01M can be made from 20mL of 6M HCl? (4)How many grams ...

**Chemisty **

How many grams of HNO3 will be contained in 300 mL of a 5 N solution?

**Physics**

Draw a block and tackle system of pulleys with a velocity ratio of 5.A block and tackle with a velocity ratio of 5 is used to raise a mass of 25kg through a vertical distanceof 40cm at a steady rate. If the efforts is equal to 60N, determine a)d distance moved by the effort b)...

**calculus**

Integral High value= 4 lower value=0 f(x)dx f(x) = 2, x < 2 x, x ? 2 It's asking me to use geometric formulas to solve this without a shape given. What am I supposed to do?

**Calculus**

Find the Riemann sum for f(x) = sin x over the interval [0, 2?], where x0 = 0, x1 = ?/4, x2 = ?/3, x3 = ?, and x4 = 2?, and where c1 = ?/6, c2 = ?/3, c3 = 2?/3, and c4 = 3?/2.

**ECONOMICS**

A REPORT ON WHY THE GOVERNMENT OWNS AND CONTROLS ONLY 30% OF THE RESOURCES IN MIXED ECONOMIC SYSTEM

**math**

in class 2/3 of the learners do school sports.Of the learners who do sport ,3/5 play soccer.what fraction of the class plays soccer

**math**

in a grade 12 ,3/4 of these class girls and 1/3 og these girls play netball. what fraction of the class plays netball

**maths**

in your class 5/6 of the learners are good with mathematics.Of these 3/4 enjoy geometry.What fraction of the class enjoy geometry

**college**

Maggie has 3/4 apple .She eats 1/2 of it.What fraction of the apple does eat

**math**

The width of a rectangle is 8 less than twice its length. If the area of the rectangle is 172 cm^2, what is the length of the diagonal?

**Precalculus**

The width of a rectangle is 8 less than twice its length. If the area of the rectangle is 172 cm^2, what is the length of the diagonal?

**Chemistry**

Hello, thanks to answer my question. .. I was thinking about the answer because it give me a negative pH ... Is that posible? And Does the initial moles of HCl the problem (0,014) interact in something?

**Chemistry**

Hello, please I need help with this excersice of chemical equilibrum. I really don't get what "1:6" means and how can I use that proportion". The excercise says: "0,014" moles of HCl are dissolved in water in a proportion of 1:6 (1 mole of HCl per ...

**Physics**

Calculate the formula for coefficient of kinetic friction in an inclined plane with a pulley and two masses coonected by a rope. You can only use the weight of the two masses, the height where the second object is and the distance that the first object does and the angle of ...

**math**

The area of a circle PQR with centre O is 72cmsquare.What is the area of sector PQR,if angle PQR=40degree

**US History**

Spanish-American War. Sorry

**US History**

In what ways would a person's race affect his or her perspective on the war? What role did the media play in the development of popular thinking related to the war?

**physics**

the magnitude of vector A is 35 units and points in the direction 325 degrees counterclockwise from the positive X-axis. calculate the X and y components of the vector

**Medical physics**

A silver cube (density of silver is 10 g/cm3) with side length of 3 cm weighs more than an aluminium cube (density of aluminium is 2.96 g/cm3) with side length of 4 cm.The cubes are each suspended by a string and allowed to be completely immersed in two identical jars ...

**physical science**

If the mans weight is 490N on earth,calculate his weight on the moon that has the gravitational force 1/2 of the gravitational force of the aerth

**algebra**

A cash register contains only five dollar and fifty dollar bills. It contains four times as many five dollar bills as fifty dollar bills and the total amount of money in the cash register is $2,870. How many fifty dollar bills are in the cash register?

**Physics**

A boy standing in a ditch throws a baseball upward toward his father. The ball leaves his hand at ground level, with an initial speed of 16.0 m/s,at an angle of θ = 51°, from the horizontal. The boy's father reaches up and catches the ball over his head, at a ...

**ap chemistry**

glycerin C3H8O is a nonvolatile liquid. what is the vapor pressure of a solution made by adding 164 g of glycerin to 338 mL of H2O at 39.8C. The vapor pressure of pure water at 39.8C is 54.74 torr and its density is 0.992 g/cm3 P solution= X solvent p solvent 1.78g C3H8O3

**CAT, mathematics literacy , business studies ,hist**

which career should i follow

**world history**

Industrial revolution

**Algebra**

I need help with this problem, and I think it's a perfect square trinomial problem. X^2+22+121-y^2 I know 11 is the square of 121.

**Chemistry**

.12

**Plane shapes:mensuration in Area of sector and segment of a circle**

What is the answer to this example:The area of circle PQR with centre O is 72cmsquare.what is the area of sector POQ if POQ=40degree?(WAEC) question

**Area of sector and segment of a circle**

What is the answer to this example:The area of circle PQR with centre O is 72cmsquare.what is the area of sector POQ if POQ=40degree?(WAEC) question

**L.O**

PROVID RECOMMENDATIONS FOR HIV?AIDS

**Math -3**

How do I write a mixed number fractions greater than 1. 6/5 13/5 9/5 17/5 How do I solve it?

**Math**

Rachel gave 1/4 of a pie to each of 5 friends. How many pies did she give to her friends in all? Write the mixed number. Ms. Fuller has 2 2/6 pies left over from her party. Write the number of pies left over as a fraction greater than 1. How do I arrive at the answer. I know ...

**number sense**

I am greater than 4 tens and less than 5 tens. I have 9 Inés. What nombre I am?

**math**

THANKS

**math**

3 its not correct

**math**

thanks the answer was 3]$ 51

**math**

a couple goes out to dinner,wchich costs $45.to the nearest dollar,what should they pay in total,if they tip 15% on the bill? 1] $45 2] $50 3] $51 4] $52 5] $53

**math**

ok thanks a lot ms.sue

**math**

you mean they are 28 woman right

**math**

there are twice as many woman as men in the union at global products altogether 84 workers at the plant are union members.how many of them are woman? 1]28 2]32 3]47 4]56 5]61

**math**

i need your help pleaseeee

**math**

yes

**math**

what is the least amount they could spend to purchase the plants they have chosen? 1]$62.00 2]$53.00 3]$50.00 4]$36.00 5]$28.00

**math**

i got it the answer 3 $ 50 thanks

**math**

i am not sure ms sue

**math**

jim and alice moore decided to plant a garden with 3 hosta plants,6 lavender plants,60 tulips,and a dogwood.the cost of the plants is as follows. hosta: $3.00 each or 3 for $8.00 lavender:$ 1 00 each or 3 for $2.00 tulips:10 for $4.00 dogwood:$14.00 each

**math**

for car is spend $138 for food $302 for miscellaneous it spend $ 460 for housing $498 for utility $90 for tax $362. question 1] was 4 [2] 5 [3] 9 [4] 5 [5] 50

**math**

what you mean by that ms sue

**math**

thanks

**math**

the answer was 3 that's correct thanks

**physics**

A circus a dog is traned to run a stranght path of length 50m/s in the direction AB as shown in the accompanying diagram.the dog starting from rest can attain a maxium speed of 5m/s in 10sec when released from any point along the path AB .the after it maintains the speeds of ...

**life orientation**

I think the impact will be that after floods they will be porvety,lack of jobs and many people will suffer

**Math**

Why is it important to line up the fraction strips on the left?

**trig**

60/theta

**chemistry**

Find the molar heat of vaporization for a substance, if 3.28mol of the substance absorbs 24.8 kJ of energy when it changes from a liquid to a gas. Answer in units of kJ/mol

**Math**

How can you use a multiplication fact to find a division fact?

**Total Quality Management**

Find the standard deviation of 32,15,54,18,and 46

**university**

A surfer is catching a wave. Suppose she starts at the top of a wave with a speed of 1.37 m/s and moves down the wave until her speed increases to 9.90 m/s. The drop in her vertical height is 2.64 m. If her mass is 63.3 kg, how much work is done by the (nonconservative) force ...

**Math**

How many vertices, edges, and faces does pyramid have?

**physics**

A stone is tied to a string (length = 1.05 m) and whirled in a circle at the same constant speed in two different ways. First, the circle is horizontal and the string is nearly parallel to the ground. Next, the circle is vertical. In the vertical case the maximum tension in ...

**MATH**

hello jennifer,can u help me with a question u've already solved? i don't know how u approached to the answer

**Math**

If two of the line segments of a polygon are parallel, what is the least number of sides it could have?

**physics**

A stone is tied to a string (length = 1.05 m) and whirled in a circle at the same constant speed in two different ways. First, the circle is horizontal and the string is nearly parallel to the ground. Next, the circle is vertical. In the vertical case the maximum tension in ...

**Math**

Why is estimating before you subtract a good idea?

**Physics**

A particle moves along a circular path over a horizontal xy coordinate system, at constant speed. At time t1 = 4.80 s, it is at point (4.40 m, 6.20 m) with velocity (3.70 m/s) and acceleration in the positive x direction. At time t2 = 11.0 s, it has velocity (–3.70 m/s) ...

**math**

Find the sum using mental math 24 + 71 =

**math**

A number rounded to the nearest thousand is 6,000. It has a 5 in the thousands place. Name the digits that could be in the hundreds place.

**Math**

300 + 100 = 400 is this correct

**Math**

Sun-Yi estimated 270 + 146 and got 300. Is her estimate reasonable? Explain.

**Math**

Miguel has 325 baseball cards and 272 football cards. He said that he has 597 cards in all. Is his answer reasonable? Explain using estimation.

**Math**

Natalie has 138 DVDs and 419 CDs. If you were to estimate the sum of the DVDs and CDs, what sentence could you write? Then find your estimated sum.

**Math**

Write each missing number 3 + = 5+3

**Math**

Show how the Commulatice Property of Addition works using the number 2, 3, and 5.

**spanish**

How do I say "sue me" in spanish?

**Composition**

united we stand divided we fall

**math**

Jill knows her average score on five tests is 88. She can find all but one test. She has tests with scores of 96,83,100, and 79. What is the missing test?

**math**

If an object is reflected twice over parallel lines, and corresponding points of the original and final translation image are 30 centimeters apart, how far apart are the parallel lines?

**geometry**

Rectangle ABCD has diagonals AC and BD. If the diagonal lengths are AC = 36 cm and BD = (3x + 3) cm, find the value of x

**geometry**

205

**English**

Invent something that would make doing homework easier. Explain it 5+ sentences. Copy into paragraph format.

**algebra**

6m^2 + 12m + 5=0 solve for m

**algebra**

2x + 4 / 10x2 +24x + 8 simplify

**algebra**

simplify 2x + 4 / 10x^2 + 24x + 8

**Algebra**

Need a formula; the product of two consecutive integers is 41 more than their sum. Find the integers.

**Algebra 2 - Conic Sections**

What is the distance between P(3, -2) and Q(-5, -2)?

**physics**

e car goes once around the track in 361 s. What is the magnitude of the centripetal acceleration of the car?

**History**

nojoda chica

**vhem**

What is the pH of a 0.570 M solution of aniline? Kb = 7.4 × 10-10

**chem**

1. What is the [K+] of a solution prepared by dissolving 0.140 g of potassium hydroxide in sufficient pure water to prepare 250.0 ml of solution? 2. What is the pH of a 0.570 M solution of aniline? Kb = 7.4 × 10-10

**spanish sra Mcgin**

Que es el suceso? El suceso es una fiesta. What is the event? The event is a party. good 2.Que tipo fiesta? Una fiesta de cumpleanos. What kind of party? A birthday party. is good 3.Quien cumpleanos? Gabriel's cumpleanos? Whose birthdayis it? (fix) Gabriela's birthday...

**English- textual history**

What does it mean to research a textual history of a work? i.e. Hamlet's textual history

**principles of microeconomics**

show how a total product curve for an input can be derived from an isoquant map.

**Biology- Amylase**

Hello, In our class, we are doing a hypothetical digestion of starch by amylase lab. I do not know where to begin with this following information. If I add Benedict's solution (which I know will change color when the presence of sugar is noted). After all of these tubes ...

**science**

what is the density of a material that has a mass of 54.457g and a volume of 13.5cm

**Sequences...again**

Sequence T1 is obtained by adding the corresponding terms of S(sub) and S(sub2). so that T(sub1) = {2.6, 3.39, 4.297, 5.3561, . . .}. We shall write T(sub1) = S(sub1) + S(sub2) to convey the addition of S(sub1) and S(sub2) in this way. Is T(sub1) an arithmetic or geometric ...

**Sequences**

A = {a1, a1 + d1, a1 + 2d1, …}, B = {a2, a2 + d2, a2 +2d2, …}. Investigate whether A + B and A x B are arithmetic or geometric sequences. If an arithmetic sequence is identified, state its common difference. If a geometric sequence is identified, state its common ...

**science**

what is the density of material that has a mass of 54.457g and a volume of 13.5cm?

**homeland security**

2-3pgs You just received intelligence that and international terrorist group has selected a major target in a major U.S. city. The terrorist are known for their hatred of capitalism and Western culture, and their intent is to wage a voilent canpaign against the United States ...