Wednesday

April 23, 2014

April 23, 2014

Total # Posts: 277

**physics**

A 0.250-kg aluminum bowl holding 0.800 kg of soup at 27.0°C is placed in a freezer. What is the final temperature if 430 kJ of energy is transferred from the bowl and soup? Assume the soup has the same thermal properties as that of water, the specific heat of the liquid so...

**physics**

=(1/2 m v^2)(.69)/(m C)

**physics**

A piece of iron block moves across a rough horizontal surface before coming to rest. The mass of the block is 1.8 kg, and its initial speed is 3.8 m/s. How much does the block's temperature increase, if it absorbs 69% of its initial kinetic energy as internal energy? The s...

**pre-algrebra**

melind wants to paint the exterior lateral surface of her house. It is nine feet high and has a perimeter of 140 feet. each gallon of paint covers 300 square feet how many one gallon cans of paint does she need to buy to paint her house

**Math**

Assume you are working on a house the length of the house is 50 feet, the width is 30 feet, and from the ground to the gable is 10 feet. The height of the triangle prism on top is 6.5 feet. If you are going to shingle the roof of this house, how many square feet should you pla...

**Correction**

Not understanding how to answer this You pore over the present evaluation: two intoxicated college females, one DUI and the other trying to run from police officers, both with no prior arrest, and both nursing majors at the local college. As judge, you must decide whether to s...

**physics**

Two stones are thrown vertically up at the same time. The first stone is thrown with an initial velocity of 11.5 m/s from a 12th floor balcony of a building and hits hits the ground after 4.6 seconds. With what initial velocity should the second stone be thrown from a 4th floo...

**Chemistry**

A gas occupying a volume of 664 mL at a pressure of 0.970 atm is allowed to expand at constant temperature until its pressure reaches 0.541 atm. What is its final volume?

**Chemistry**

A gas occupying a volume of 664 mL at a pressure of 0.970 atm is allowed to expand at constant temperature until its pressure reaches 0.541 atm. What is its final volume?

**language and art**

How to write a character sketch?

**7th Grade Language Arts**

yes 1( C 2( C 3( B

**Social Studies**

All I know is that it is Harrison. Can't remember why but it is.

**physics**

Just use (k*|q1|*|q2|)/r^2 It should come out as 1,638,427.5N

**math**

a pizza has a diameter of 18. what is the best estimate of the area of the pizza?

**Physics**

can anyone explain how they got their answer?

**Math**

1.5%h=12. What is h?

**physics**

A ferry boat is 6.2m wide and 7.1 m long. When a truck pulls onto it, the boat sinks 6.02 cm in the water. What us the weight of the truck? The acceleration of gravity is 9.81 m/s2. Answer in units of N

**PLEASE HELP**

PLEASE

**College Algebra and Finance**

Please help! Just need the answer... A lender gives you a choice between the following two 30-year mortgages of $200,000: Mortgage A: 6.65% interest compounded monthly, one point, monthly payment of $1283.93 Mortgage B: 6.8% interest compounded monthly, no points, monthly paym...

**math**

A lender gives you a choice between the following two 30-year mortgages of $200,000: Mortgage A: 6.65% interest compounded monthly, one point, monthly payment of $1283.93 Mortgage B: 6.8% interest compounded monthly, no points, monthly payment of $1303.85 Assuming that you can...

**Math**

The difference between the two numbers is 14. The LCM of the two numbers is 16. Find the two numbers

**physics**

your completely wrong

**physics**

A car traveling in a straight line has a velocity of +3.3 m/s. After an acceleration of 0.71 m/s2, the car's velocity is +8.8 m/s. In what time interval did the acceleration occur?

**algebra**

Find the least common multiple of the monomials. 5a squared, and 16a cubed. Also 17b squared and 3b cubed. Could you show me how to do these. Thank you, Sandy

**math**

what is 2056 less than 22010

**math**

Use breaking apart method to solve 5 times 5, I'm not sure what this means

**algebra**

A rectangle has a length that is 5 feet more than its width. The area of this rectangle is 84 square feet. What is the width and length of this rectangle?

**algebra**

I dont understand this question How would you explain to your friend why the quotient of x*6 and x^2 is x^6 Remember your friend is questioning the rule, so you just cannot say it is the rule.

**math**

how do i factor the following equation? 3x^2=48

**ALGEBRA**

List the conditions when the sum of a positive number and several negative numbers will be positive. Include an example that represents your answer.

**prealgebra/ check answer please**

John who is an amateur golfer spends 3 hours every day practicing golf. What percentage of his waking hours does John spend practicing golf if he sleeps 9 hours a day? 24-9=15 3/15= 0.2 0.2 x 100 = 20% spent practicing

**prealgebra/ check answer please**

Thanks for checking :)

**prealgebra/ check answer please**

What single discount is equivalent to two successive discounts of 15% and 7%? x= 100 [1-(.85)(.93)] = 100 (1-.79) =100 (.21) =21%

**math/prealgebra**

5 is 20% of what number? I am so lost

**math**

11 - 8 ÷ (1/3 + 1/5) I need to know how to to this please show me. Thank you

**U.S. History**

How would I persuade someone that the Vietnam war was the most devisive war in American History?

**math/algebra**

Express 55 minutes as a fraction of 11/3 hours. Please show work

**algebra**

Express 55 minutes as a fraction of 11/3 hours. please this is doen.

**math**

Subtract the sum of 81.6 and 4.07 from 129.4 Please show how its done.

**statistics**

the life of light bulbs is distributed normally. The variance of the life time is 225 and the mean lifetime of a bulb is 590 hours. Find the probability of a bulb lasting for at most 603 hours. Yeah, WTF??? Why me!??!

**History**

I need some information on China's modern genocides and crimes against humanity staying the 20th century.

**Calculus grade 12**

a) 2cos2x b) 2cosx*cosx - 2sinx*sinx = 2cos2x c) double angle identity

**Chem Lab**

Thank you, it should say 'used' not 'sued'.

**Chem Lab**

Can the NH3/NH4Cl system be sued to prepare a buffer of a pH 9.5? why or why not? Can it prepare a buffer of pH 5? There were two buffers, 0.2 M and 0.1M.

**History**

Tell meabout Forced Sterilization and its sue int he U.S. What was the total number of people in the U.S. sterilized and the reasons why. How was this later imitated by the Nazi people?

**science**

Identify one harmful activity that humans do that might change the percentage of water that is available as a resource? Predict the possible effects this activity could cause to the food chains in that area, the changes in the number and types of organisms, and on the populati...

**Social Studies**

What continent is located south of Europe in Medieval Europe?

**precal**

given tanx= (1/2) and cscx<0, find cos2x

**7th grade math**

Toby is making a model of a battlefield. The actual area is 11 miles by 7.5 miles. He wants to put the model on a 3.25 ft by 3.25 ft square table with at least 3 inches on each side between the model and table edges. What is the largest scale he can use?

**7th grade math**

Toby is making a model of a battlefield. The actual area is 11 miles by 7.5 miles. He wants to put the model on a 3.25 ft by 3.25 ft square table with at least 3 inches on each side between the model and table edges. What is the largest scale he can use?

**Geology**

I need help comparing and contrasting rocks and minerals.

**Physics**

Why did the chicken cross the road?

**algebra**

There are two similar triangles. The angles are: from top to bottom left: DE, from bottom left to right: EF, And from Top to bottom right corner: DF. DE: 10.32 cm.EF: 8.88 cm.FD 12.24 cm. The angles are: D,top,45 Degrees. E, bottom left corner, 79 Degrees. And F, Bottom right ...

**grade 12 math**

it is f(x)=x^3+8/x^2+x-6

**grade 12 math**

Given the function f(x)= x^3+8/x^2+-6, determine the eqaution of the asymptotes and state the end behaviours of the graph near the asymptotes.

**Physics-please**

When a sound wave passes from air into a solid object, which of the following wave properties change? -Frequency -Wave Speed -Amplitude -Wavelength all that apply

**Science**

When a sound wave passes from air into a solid object, which of the following wave properties change? -frequency -wave speed -amplitude -wave length Can be more than one

**Algebra**

Multiply and simplify (8v+4)(4x^2+9x+4)

**Physics**

A football bobble-head figure sits on your car dashboard. The 83-g head of the figure is attached to a spring with a spring constant of k = 21 N/m. You are driving along a straight road when you notice a series of hoses lying across the road, perpendicular to your motion, that...

**math**

aladder attached to the side of a ship has ten rungs each one foot apart visible above the water if the water level rises 1.5 feet per hour how many rungs will be visible after 3 hours

**Phisics**

A ball is dropped from the initial height h1 above the concrete floor and rebounds to a height of equal to 67% of the initial height h1. What is the ratio of the speed of the ball right after the bounce to the speed of the ball just before the bounce? This ratio is called coef...

**Physics**

A Ferris wheel has a circumference of 93 m and it completes one rotation in 2.3 minutes without stopping. What is the percentage change in apparent weight (=weight difference/weight = W/W) of a passenger between the highest and the lowest positions on this Ferris wheel?

**calculus**

so then what does f equal and what does a equal

**calculus**

The limit as x approaches 0 of ((4^x)-1)/x The limit above represents the derivative of some function f(x) at some number a. Find f and a.

**calculus**

The limit lim as x approaches 1 of (x^12-1)/(x-1) represents the derivative of some function f(x) at some number a. Find f and a.

**calculus**

Find the value of the constant C that makes the following function continuous on (-infinity, +inf) f(x)={cx+2 if x is in (-inf,2] cx^2-2 if x i in (2, inf)

**Physics**

Can you help me through this one? I don't want just the answer: A ball is thrown straight up and rises to a maximum height of 24 m above the ground. At what height is the speed of the ball equal to half of its initial value? Assume that the ball starts at a height of 1.9 m...

**History**

I'm looking for information about the Black Death Plague without using Wikipedia as much as possible. Some questions that I need to keep in mind and answer are: How is religion relevant to the plague? Was there a cure? How did it start?

**Physics**

Top fuel drag racer can reach the maximum speed of 304 mph at the end of the 1/4-mile (402 m) racetrack. (a) Assuming that the acceleration is constant during the race, calculate the average value of the acceleration of the top fuel car. (b) What is the ratio of that accelerat...

**Physics**

Consider two masses m1 and m2 connected by a thin string. Assume the following values: m1 = 4.18 kg and m2 = 1.00 kg. Ignore friction and mass of the string. 1) what is the acceleration of the 2 masses? 2)What should be the value of mass m1 to get the largest possible value of...

**Physics**

A ball is thrown directly upward with an initial velocity of 14 m/s. If the ball is released from an initial height of 2.8 m above ground, how long is the ball in the air before landing on the ground? Ignore air drag.

**Physics**

you my friend are a physics magician

**Physics**

In a tug-of-war between two athletes, each pulls on the rope with a force of 365 N. What is the absolute value of the horizontal force that each athlete exert against the ground?

**Physics**

If a car is travelling with a constant speed of 5.53 m/s in the Westward direction, what is the resultant force acting on it? Ignore friction

**Physics**

Which of the following represent examples of the following situation: An object that starts at the origin at t=0 and at some time later its displacement from origin is zero but the velocity is not zero: 1)An object in a uniform circular motion around a circle passing through o...

**Physics**

so what you're saying is: forceonblock3-mu(m3)=m3*a forceonblock3-0(m3)=... forceonblock3=...

**Physics**

what does u stand for in the above equations?

**Physics**

Three blocks rest on a frictionless, horizontal table, with m1 = 9 kg and m3 = 16 kg. A horizontal force F = 104 N is applied to block 1, and the acceleration of all three blocks is found to be 3.3 m/s2. 1) Find m2 2)What is the normal force between 2 and 3?

**MATH**

-3 is correct

**Physics**

Which of the following represent examples of the following situation: An object that starts at the origin at t=0 and at some time later its displacement from origin is zero but the velocity is not zero: 1)An object in a uniform circular motion around a circle passing through o...

**Vectors (Physics/Math)**

Vector A has a magnitude of 18 (in some unspecified units) and makes an angle of 25 with the x axis, and a vector B has a length of 24 and makes an angle of 70 with the x axis. Find the components of the vector C in the following: (a) C = A + B Cx = Cy = (b) C = A - B Cx= Cy=

**Physics**

Vector A has a magnitude of 18 (in some unspecified units) and makes an angle of 25 with the x axis, and a vector B has a length of 24 and makes an angle of 70 with the x axis. Find the components of the vector C in the following: (a) C = A + B Cx = Cy = (b) C = A - B Cx= Cy=

**math**

duck= d gull= g pelican= p dgp, dpg, gdp, gpd, pdg, pgd

**Physics**

A cheetah runs a distance of 101 m at a speed of 24 m/s and then runs another 101 m in the same direction at a speed of 38 m/s. What is the cheetah's average speed?

**PSY/300**

causal in the scientific sense..

**PSY/300**

what is causal observation ?

**PSY/300**

What is casual observation and why is it different from scientific disipline?

**PSY/300**

What is the difference between scientific disipline and casual observation?

**algebra**

(a) A graph of is shown in the figure, where y _ L(x). As the weight of the plane increases, what can be said about the length of the runway required?

**us history**

doing a final review crossword and i cant figure these two out 1. Planned_____; creating products that would wear out over a given period of time ( _ _ _ _ _ _ n _ _ _ _ _ _) 13 letters 2. a clear indication of nation-wide voter support ( _ a _ _ _ _ e) 7 letters please help i...

**geometry**

what is the approximate measure of angle A to the nearest tenth of a degree

**physical**

Everyone i need your attention! I'm having a HUGE PE test on Monday, and I dont know how many players are on a basketball team!!!!! HELP??????

**algebra**

Heart Rate An athlete starts running and continues for 10 seconds. The polynomial calculates the heart rate of the athlete in beats per minute t seconds after beginning the run, where . (a) What is the athlete’s heart rate when the athlete first starts to run? (b) What is...

**Chemistry**

Consider the following electochemical cell. Pt | Fe3+ (0.0600 M), Fe2+ (6.50e-5 M) || Sn2+ (0.0620 M), Sn4+ (3.90e-4 M) | Pt (a) Calculate the voltage of the cell, Ecell, including the sign.

**math**

177

**algebra**

What is the basic principle that can be used to simplify a polynomial? What is the relevance of the order of operations in simplifying a polynomial?

**Science**

Please help me! How much energy is released when125 grams of molten iron solidifies?

**chemistry**

A bearthing mixture used by deep-sea divers contains helium, oxygen, and carbon dioxide. What is the partial pressure of oxygen at 1.2 atm if PHe = 0.98 atm and PCO2 = 0.04 atm? a) 1.02 atm b) 0.12 atm c) 0.94 atm d) 0.18 atm

**Algebra**

Explain why the addition method might be preferred over the substitution method for solving the system 2x-3y=5 5x+2y=6 Am lost on these.Please help

**Algebra**

When solving a system of equations by the addition method, how do you know when the system has no solution?