Saturday

July 26, 2014

July 26, 2014

Total # Posts: 177

**Test and Measurements**

You are interested in seeing if a new test will help to determine who will be successful in a training program. The current rate of success is 70% for 200 students. When the new test is implemented, the rate increases to 85% for the 50 students who pass the test and are allowe...

**English**

I think that 3 is a pretty good one since that't what your writing about . The expectations being harmful .

**Math**

Two sides of a triangle measure 7 cm and 15 cm . Which of the following could not be the length of the third side ? A. 5 cm B. 9 cm C. 15 cm D. 22 cm I'm confused because at first I tried Pythagorean thereom and it didn't really work .

**physcial science**

Jennifer, who has a mass of 50.0 kg, is riding at 35.0 m/s in her red sports car when she must suddenly slam on the brakes to avoid hitting a deer crossing the road. She strikes the air bag that brings her body to a stop in 0.500 s. What average force does the seat belt exert ...

**phisics**

Which of the following situations represents a negative displacement? (Assume positive position is measured vertically upward along a y-axis.)

**Trigonometric Function**

A Ferris wheel has a radius of 10 meters and is revolving 6 times each minute (wheel's frequency.) The wheel's center is 12 meters from the ground. If time starts on the ground, then find a sine function that shows the height from the ground for a car on the Ferris whe...

**Pre cal**

Translate the graph of y=sinx to the right by pi units, and then reflect this curve about the x-axis what graph result?

**Physics**

a 5 kg crate falls from a height of 2.0 m into an industrial spring scale. When the crate comes to rest the compression of the spring is 24 cm. what is the spring constant?

**Child Care**

Please help me, I need to make a Lesson Plan on diversity, for Pre-k, I choose a story book, of children from different parts of the world, each going to and learning in school or on the outside. The goal should show differences but also its similarities. I need a learning obj...

**accounting**

determine how the disallowance of LIFO will impact U.S. multinational firms that report under IFRS.

**math**

Which one(s) of these twelve brands would be considered outliers, if there are indeed any at all? How extreme does something have to be considered an outlier? Brand,Strawberry,Vanilla 1,140,140 2,210,230 3,200,170 4,200,180 5,110,100 6,180,180 7,210,150 8,140,150 9,150,150 10,...

**physics**

A 7g bullet going at 300m/s hits and embeds itself into a 3.456kg block held on a frictionless table by a spring with k = 40N/m. Find the speed of the block and bullet after collision.

**Computer Science**

Write a class “Program1” that has the method “allLess” (below) that receives two arrays of integers and returns true if each element in the first array is less than the element at the same index in the second array. For example, given the arrays {42, 2, 30}...

**English**

The assignment just says "literary terms". It does not say which terms.

**English**

I am doing my summer reading for 9th grade reading assignment & need to write about 10 passages from a variety of literary terms. Could you explain some of these terms?

**Statistics**

Blossom's Flowers purchases roses for sale for Valentine's Day. The roses are purchased for $10 a dozen and are sold for $20 a dozen. Any roses not sold on Valentine's Day can be sold for $5 per dozen. The owner will purchase 1 of 3 amounts of roses for Valentine&#...

**College Physics**

A speck of charged dust with a mass of 39mu g. is kept levitating by putting it in an electric field. If you must apply a field of 10 N/C to keep it suspended in mid-air, what is the charge on the speck of dust? Can someone please help soon? I got this wrong on my last test be...

**College Physics**

The rectangular coils in a 201-turn generator are 14 cm by 17 cm. What is the maximum emf produced by this generator when it rotates with an angular speed of 525 rpm in a magnetic field of 0.81 T? I'm not sure what equations to use.

**Physics**

A particle with a charge of 31 µC moves with a speed of 62 m/s in the positive x-direction. The magnetic field in this region of space has a component of 0.50 T in the positive y-direction, and a component of 0.61 T in the positive z-direction. What is the magnitude and ...

**Physics**

A particle with a charge of 31 µC moves with a speed of 62 m/s in the positive x-direction. The magnetic field in this region of space has a component of 0.50 T in the positive y-direction, and a component of 0.61 T in the positive z-direction. What is the magnitude and ...

**Physics**

Two trains with 112-Hz horns approach one another. The slower of the two trains has a speed of 26 m/s. What is the speed of the faster train if an observer standing near the tracks between the trains hears a beat frequency of 4.7 Hz? (Express your answer to the nearest 0.1 m/s...

**CHM**

Consider the following reaction: HCN <--> H+ + CN- delta H = 315kJ If 1.00 mole of CN- in the form of NaCN was added to equilibrium mixture, describe the effect on [H+], [HCN], [CN-], pH, and heat.

**Physics**

A solenoid is 3.2 m long and has 500 turns per meter. What is the cross-sectional area of this solenoid if it stores 0.32 J of energy when it carries a current of 12 A? So I used L = 2*E / I^2; and then I used A = L*l / (uo * N^2) but my answer isn't coming out right at al...

**Physics**

Consider the RL circuit shown in the figure, where R = 5.0 Ω and L = 4.6 H. How much energy is stored in the inductor after the switch has been closed a long time? I would know how to do this if they actually gave me a value for time, but I'm lost now. Can someone hel...

**chemistry**

What would the boiling point be of 300 ml with 40 g CuCl2 dissolved in it?

**chemistry**

What would the boiling point be of 300 ml with 40 g CuCl2 dissolved in it?

**chemistry**

What would the boiling point be of 300 ml with 40 g CuCl2 dissolved in it?

**math**

help

**math**

How far does the tip of the minute hand of a clock move in 100 minutes if the hand is 3.3 inches long?

**Physics**

A magnetic field increases from 0 to 0.09 T in 3.0 s. How many turns of wire are needed in a circular coil 20 cm in diameter to produce an induced emf of 7.5 V? Please help soon.

**Physics**

A single-turn square loop of side L is centered on the axis of a long solenoid. In addition, the plane of the square loop is perpendicular to the axis of the solenoid. The solenoid has 1490 turns per meter and a diameter of 6.00 cm, and carries a current of 2.46 A. Find the ma...

**Physics**

A single conducting loop of wire has an area of 7.4 10-4 m2 and a resistance of 110 Ω. Perpendicular to the plane of the loop is a magnetic field of strength 0.18 T. At what rate (in T/s) must this field change if the induced current in the loop is to be 0.24 A? I really ...

**math**

Convert the angle given in radians to degrees. 174 and -360

**math**

Danny has 75 marbles in red color and blue color. He found out number of red marbles is 15 less than twice of the blue marbles. What are the numbers of red and blue marbles does danny have?

**Physics**

In Oersted's experiment, suppose that the compass was 0.30 m from the current-carrying wire. If a magnetic field of 1/3 the Earth's magnetic field of 5 10−5 T was required to give a noticeable deflection of the compass needle, what current must the wire have carr...

**Physics**

To construct a solenoid, you wrap insulated wire uniformly around a plastic tube 12 cm in diameter and 45 cm in length. You would like a 2.0-A current to produce a 2.1-kG magnetic field inside your solenoid. What is the total length of wire you will need to meet these specific...

**finance**

(Bond valuation) Eagle Ventures has a bond issue outstanding with an annual coupon rate of 7 percent and 4 years remaining until maturity. The par value of the bond is $1,000. (a) Determine the current value of the bond if present market conditions justify a 14 percent require...

**Math**

How do I factor y^3 + y^2 -4y -4

**Finance**

Suppose you own $1 million worth of 30-year Treasury bonds. Is this asset riskless?

**Physics**

A 11-V battery is connected to three capacitors in series. The capacitors have the following capacitances: 5.3 µF, 10.7 µF, and 31.8 µF. Find the voltage across the 31.8-µF capacitor. Please Help!

**Physics**

A parallel-plate capacitor is made from two aluminum-foil sheets, each 3.90 cm wide and 10.3 m long. Between the sheets is a mica strip of the same width and length that is 0.0225 mm thick. What is the maximum charge that can be stored in this capacitor? (The dielectric consta...

**Physics**

As a crude model for lightning, consider the ground to be one plate of a parallel-plate capacitor and a cloud at an altitude of 590 m to be the other plate. Assume the surface area of the cloud to be the same as the area of a square that is 0.50 km on a side. (a) What is the c...

**science**

While rearranging a dorm room, a student does 286 J of work in moving a desk 1.3 m. What was the magnitude of the applied horizontal force?

**science**

While rearranging a dorm room a student does 286 J of work to move a desk 1.3 m. What was the magnitude of the applied horizontal force?

**Chemistry**

Cu.

**Chemistry**

What is the lewis dot structure for copper?

**Math**

The Americans with disabilities act requires that wheelchair ramps have a slope no greater than 1/12 what is the minimum horizontal length a 2 foot high ramp can have ?

**Chemistry**

Assume that 7.2 L of I2 are produced at STP according to the following balanced equation: 2KI+Cl - 2KCl+ I2 How many grams of KI (MOLAR MASS=166.002G/MOL) reacted

**Chemistry**

Assume that 7.2 L of I2 are produced at STP according to the following balanced equation: 2KI+Cl - 2KCl+ I2 How many grams of KI (MOLAR MASS=166.002G/MOL) reacted

**Chemistry**

Assume that 7.2 L of I2 are produced at STP according to the following balanced equation: 2KI+Cl - 2KCl+ I2 How many grams of KI (MOLAR MASS=166.002G/MOL) reacted

**math**

1 out of 6

**Precalculus**

5. A water wheel has a radius of 60 feet, and the center is 14 feet above the water level. The water wheel makes a complete rotation every 45 minutes. A specific cup starts at the top of the wheel. Write a sine equation to model the above water wheel.

**math**

interest is $1104, principal is $4600, and time is 4 yrs. What is rate?

**math**

interest is 67.50 and rate is 3%, and time is 3 years. What is the principal?

**Honors Physics**

If the potential energy is 1962000 what is the kinetic energy of a boulder weighing 200 kg

**Economics**

Secondhand Smoke Kills 600,000 People a Year: Study Secondhand smoke globally kills more than 600,000 people each year, accounting for 1 percent of all deaths worldwide, according to a new study. . . . Researchers estimated that annually secondhand smoke causes about 379,000 d...

**Economics**

5. If the average adult produces $90,000 of output per year, how much output is lost as a result of adult deaths from secondhand smoke, according to the News on page 74? $

**thermochemistry **

A chemical reaction takes place in a container of cross-sectional area 100 cm2 . As a result of the reaction, a piston is pushed out through 19 cm against an external pressure of 596 torr. What is the value for w for this reaction?

**Chemistry**

So you're saying that if you have the Ka of any acid and you can use the ionization constant of water to find Kb of its conjugate base?

**Chemistry**

What is the pH of a 0.50 M solution of NaNO2 if the Ka of H20x = 4.5 x 10^-4. I know that you use the Ka to find Kb and solve from there, but why?

**chemistry**

(4.68 g)x (1 cm^3 / 2.34 g) = cubic cm of born. The unit of grams is cancelled.

**Science**

Xylem dries up and dies what is the effect

**AP chemistry**

Sulfuric acid (H2SO4) is prepared commercially from elemental sulfur using the contact process. In a typical sequence of reactions, the sulfur is ﬁrst burned:S + O2 → SO2 , then it is converted to SO3 using a catalyst: 2 SO2 + O2 → 2 SO3 . The resulting SO3 ...

**AP chemistry**

A 22.709 g sample of impure magnesium carbonate was heated to complete decomposition according to the equation MgCO3(s) → MgO(s) + CO2(g). After the reaction was complete, the solid residue (consisting of MgO and the original impurities) had a mass of 15.3018 g. Assuming...

**physics**

A cannon on a level plain is aimed 50 degrees above th e horizontal and a shell is fired with a muzzle velocity of 1200 ft/s toward a vertical cliff 3200 ft away. How far above the bottom does the shell strike the side wall of the cliff?

**Math**

If a number has a 9 in the ones place,it is always divisible by 3

**PreCalculus (PLEASE HELP, IM BEGGING!)**

Can anyone please explain these problems to me?? I really need help!I need to simplify these trig expressions but I don't understand how my teacher is doing it at all and I have a quiz on this tomorrow! I've really been trying but I just don't get it! 1)Mulitply: [...

**chemistry**

Use bond energies (Table below) to estimate H (kJ) for the following gas-phase reaction: (CH3)2CHOH(g) ==> (CH3)2C=O(g) + H2(g)

**British Literature **

What figure of speech is used in this statement: "Good Mistress Accost, I desire better acquaintance."

**Math**

Mrs. Klein made some tarts. She sold three fifths of them in the morning and one fourth the remainder in the afternoon. If she sold 200 more tarts in the morning than in the afternoon how many tarts did she make?

**science**

Ions are electrically charged particles that are formed when certain compounds are dissolved in water. These solutions will conduct electricity. The Swedish scientist Svante Arrhenius coined the term ion (which means wanderer) to explain why solutions of electrolytes will cond...

**science**

As temperature rises, solids generally become more soluble in water, but gases become less soluble. If a soft drink contains high concentrations of sugar and carbon dioxide, which of the following may be expected to happen if it is cooled down? A) Sugar may precipitate out. B)...

**science**

Amniotes vertebrates are generally classified into three orders: Reptilian, Ayes (birds), and Mammalian. Of the following, which group of three animals contains one member of each order?

**science**

Chemical fertilizers stimulate plant growth; but if the concentration is too high, they may damage roots. What precautions concerning chemical fertilizers must a gardener take?

**scientist**

Scientists performed an experiment to determine whether there is a connection between learning ability and food. They took two groups of 20 mice each, all from the same purebred strain. The mice were deprived of food for 3 days and then given a standard learning session in run...

**math**

two fifth of the students walked to school what fraction did not walk?

**Statistics**

How do you solve this? 28!/(28-28)!28! * 0.88^28 *0.12^28-28 I need help on how to solve this on a graphing calculator(TI-83 Plus) Can you help me? Please show step by step instructions! Thank you!!!

**Science 6th grade**

i need help trying to do a class project on a ocean ecosystem

**Philosphy**

Ms. Ferguson who is practically blind has testified that she saw the defendant stab the victim in the twilight shawdows a 100 yards from the incident. Therefore members of the jury you must find the defendant guilty. Identifiy this fallacy

**computer literacy**

Online education has evolved over the last ten years as much as the cell phone. Given this, what have been some of the major improvements and changes in the digital classroom?

**computer literacy**

If I post a poem on my facebook site and someone cuts and pastes it on their site is that a case for stealing my intellectual property

**Oncology Report**

Ok, we're are supposed to do a one page annual report on oncology and I'm having trouble understanding exactly what I'm supposed to do. Our teacher gave us a sheet saying "You are asked by the CEO of a hospital to contribute to the annual report. She wants you...

**Algebra**

Omg! Would you just please help me I have 3 kids and I'm cooking dinner, please just help me understand this one!

**Algebra**

The town of appleville recorded the following dates and populations. YEAR POPULATION 1985 51.5 1985 53 1990 56 1995 62 Estimate the approximate population of Appleville in 1988 by finding an equation and then substituting. HELP!!!

**Math**

Thank you(:

**Math**

That is no where near what I need I need help please!

**Math**

Use patterns or a linear equation to complete the table. 11) x y 1 -1 3 3 5 7 10 ? 50 ? 100 ? I don't understand what I'm suppose to do! Please hep and explan well! Thank you!

**Math**

Write the answer to the problem as an algebraic expression. (Tell how you got your answer.) 1. Today the Center City baseball team scored 5 runs. The day before yesterday they scored W runs. How many runs did they score in these two days? 2. A theater ticket for adults is a do...

**Math**

Tell whether the quantity is constant or variable. 1. The price per gallon of gasoline. 2. The distance between Chicago and Boston. I need explanation for each also.... Thank you!

**Math**

Three blue and five red balloons are each tied to a string and the strings are held together. If one of the strings is selected at random, determine the odds in favor of the balloon being red.

**math**

a. The sales representative informs you that there is a total of 96 houses for sale. Of these 96, some have one floor plan while the others have a different floor plan. Use x to represent floor plan one and y to represent floor plan two. Write an equation that illustrates the ...

**math**

a. The sales representative informs you that there is a total of 96 houses for sale. Of these 96, some have one floor plan while the others have a different floor plan. Use x to represent floor plan one and y to represent floor plan two. Write an equation that illustrates the ...

**Math**

If each angle of a regular polygon measures 140 degrees, how many sides does it have?

**Math**

How many ways can 5 people be arranged in a straight line if there are 12 people to choose from

**Math**

In how many ways can 7 people line up for play tickets

**Math**

In how many ways can 7 people line up for plane tickets?

**Math**

Make a table to display your answer. When a coin is tossed four times, sixteen equally likely outcomes are possible as shown below: HHHH HHHT HHTH HHTT HTHH HTHT HTTH HTTT THHH THHT THTH THTT TTHH TTHT TTTH TTTT

**Math**

A contractor is considering a sale that promises a profit of $30,000 with a probability of .7 or a loss of $4,000 with a probability of .3. What is the expected profit?

**geometry**

Suppose you buy 1 ticket for $1 out of a lottery of 3,000 tickets. If the prize for the one winning ticket is to be $1,000, what are your expected winnings?

**chemistry**

35.0 g of an organic compound dissolved in 500. g of water have a freezing point of -3.72 degrees C. What is the molecular weight of the solute?