Monday

July 25, 2016
Total # Posts: 1,525

**math physics**

A meteorite is a solid composed of stone and/or metal material from outer space that passes through the atmosphere and hits the earth’s surface. Find the kinetic energy of a meteorite with mass 250 kg that hits the earth at 25 km/s. Given: m=250kg v=2.5E4m/s <<< ...
*October 13, 2014*

**math physics**

A meteorite is a solid composed of stone and/or metal material from outer space that passes through the atmosphere and hits the earth’s surface. Find the kinetic energy of a meteorite with mass 250 kg that hits the earth at 25 km/s. Given: m=250kg v=2.5E4m/s <<< ...
*October 13, 2014*

**math physics**

A meteorite is a solid composed of stone and/or metal material from outer space that passes through the atmosphere and hits the earth’s surface. Find the kinetic energy of a meteorite with mass 250 kg that hits the earth at 25 km/s. Given: m=250kg v=2.5E4m/s <<< ...
*October 13, 2014*

**Science Physics**

A 250 kg part falls from a plane and hits the ground at 150 km/h. Find its kinetic energy. Would I need to convert 150km/h to m/s? then multiply with the mass?
*October 13, 2014*

**Science Physics**

Did it like this 1.00E6*62.4*736=4.53ftlb
*October 13, 2014*

**Science Physics**

The Hoover Dam is 726 ft high. Find the potential energy of 1.00 million ft3 of water at the top of the dam.(1 ft3 of water weighs 62.4 lb.)
*October 13, 2014*

**Science Physics**

How long would it take a 4.50-kW motor to raise a 175-kg boiler to a platform 15.0 m above the floor? Is this correct? 175*9.80*15.0/4.50
*October 10, 2014*

**Math Physics**

A wattmeter shows that a motor is drawing 2200w. What horsepower is being delivered? Is this correct? 2200/746 = 2.95
*October 10, 2014*

**Physics**

A wattmeter shows that a motor is drawing 2200w. What horsepower is being delivered? Is this correct? 2200/746 = 2.95
*October 10, 2014*

**math/physics**

thank you, similar but Had to divide by the 2nd mass instead of the 1st mass, Only difference
*October 8, 2014*

**math/physics**

A 75.0-kg paint cart with rubber bumpers is rolling 0.965 m/s to the right and strikes a second cart of mass 85.0 kg moving 1.30 m/s to the left. After the collision, the heavier cart is traveling 0.823 m/s to the right. What is the velocity of the lighter cart after the ...
*October 8, 2014*

**math/physics**

Made a mistake, I had to divide by 75.0 so that the 90.0 cancels out. Thank you
*October 8, 2014*

**math/physics**

A 90.0-g disk traveling 3.00 m/s to the right collides with a 75.0-g disk traveling 8.00 m/s to the left. After the collision, the heavier disk is traveling 7.00 m/s to the left. What is the velocity of the lighter disk after the collision? Do I have this setup right? (90.0*3....
*October 8, 2014*

**math**

find the value of one hundred and fifty multplied by itself
*October 8, 2014*

**Math**

A school hall has 30 rows of seats. Each row has 28 seats.How many seats are there. please show work out.
*October 8, 2014*

**math/physics**

(0.600*4.00+1.00*(-5.00)-0.600*(-7.25))/1.00 = 1.75 I put parenthesis just to show the negative numbers, but the whole problem should be put in the parenthesis then divide by 1.00 in a calculator
*October 7, 2014*

**math/physics**

A 0.600-kg ball traveling 4.00 m/s to the right collides with a 1.00-kg ball traveling 5.00 m/s to the left. After the collision, the lighter ball is traveling 7.25 m/s to the left. What is the velocity of the heavier ball after the collision?
*October 7, 2014*

**math**

A band played 3 concerts and earned a total of $321.00. The band earned about the same amount for each concert. Estimate how muchthe band earned each night.
*October 7, 2014*

**Physics**

A 0.600-kg ball traveling 4.00 m/s to the right collides with a 1.00-kg ball traveling 5.00 m/s to the left. After the collision, the lighter ball is traveling 7.25 m/s to the left. What is the velocity of the heavier ball after the collision?
*October 7, 2014*

**Math (money)**

19
*September 28, 2014*

**chemistry**

24minutes
*September 27, 2014*

**Match**

justine has 162 red buttons,98 blue buttons,and 284 green buttons. she says she knows she has more than 500 buttons without adding.do you agree? explain.
*September 25, 2014*

**chemistry**

Pure aluminum has density 2.70g/cm^3. If we add a solid aluminum cylinder to a graduated cylinder containing 19.2 of water, and the water level in the cylinder rises to 24.7 ml, what is the mass of the aluminum cylinder?
*September 19, 2014*

**chemistry**

Acetone, a common solvent has a density 0.79g/cm^3 at 20C. What is the volume of 85.1g of acetone at 20C? What is the mass of 125ml of acetone at 20C? Show your calculations.
*September 19, 2014*

**Math: Pattern**

Nope its 5,9,8,12,11,15,14,18,17,21 Its 21 11th would be 20
*September 18, 2014*

**math 6th grade**

Maritza is baking cookies to bring to school that requires 3 eggs and 2 cups of sugar. To have enough for everyone she bought 12 eggs will 6 cups of sugar be enough? I tried multiplying 3 x 4 = 12 so then multiplied 2 x 4 which is 8 so there would not be enough but we are ...
*September 17, 2014*

**4th grade math**

GCM OF 12 and 20. Please explain
*September 17, 2014*

**math**

a living room measure 450 x 330cm. find the dimension of the largest square tile that can be used to tile the floor without cutting
*September 15, 2014*

**maths**

how did you derive the formula? please can you explain? I really need to understand this.
*September 14, 2014*

**maths b**

use the z score table to find the floolwing: a) p(1.2<z<2.4) b) p(z>1.675) please show working out
*September 11, 2014*

**maths a**

us e the formula z=x-u/SD to determine the z score for a score of 34.5 a normal distribution if the mean is 46.5 and the standard deviation is 8.7
*September 11, 2014*

**maths a**

Charlotte received a score of 68 on both her English and Maths tests. The mean for English was 52 and the mean for Maths was 55. The standard deviations for English and Maths were 10 and 8 respectively. In which subject did Charlotte perform better? Explain your decision. ...
*September 11, 2014*

**BUS**

Please Help! 3. According to the text, today’s public relations firms offer all the following services EXCEPT: executive speech training. research and evaluation. advertising placement. events management. Question 4. 4. All of the following are examples of the public ...
*September 8, 2014*

**Bus**

Please help! Which is not a component of basic public relations practice? counseling employee relations fund-raising networking
*September 8, 2014*

**algebra**

You live under a bridge that goes over a river. the underneath side of the bridge is an arc that can be modeled with the function y=-0.000407x^2+0.658x.Where x and y are in feet. How high is the bridge? How long is the section of bridge above the arc?
*September 5, 2014*

**chemistry**

A sprinter set a high school record in track and field, running 200.0 m in 21.0s . What is the average speed of the sprinter in kilometers per hour?
*September 4, 2014*

**Maths**

A student says that a speed of 50m/s is faster than a speed of 140km/h because the number is bigger.What would you say to them?
*September 3, 2014*

**Math **

•The x-intercepts of the graph of y=f(x) •The real zeros of the function f •The real solutions to the equation f(x)=0 Use the equation f(x)=4x−28 to verify that all three do produce answers that are numerically the same.
*August 28, 2014*

**College Bio **

If two parental organisms of genotype pp and PP were crossed, what percentage of F1 offspring would be homozygous recessive? (Assume simple Mendelian pattern of inheritance and unlinked alleles.)
*July 26, 2014*

**College Algebra**

Give two functions f(x) and g(x) such that (fg)(-1)=4
*July 24, 2014*

**College Algebra**

Thanks
*July 24, 2014*

**College Algebra**

i still don't get it. Thanks
*July 24, 2014*

**College Algebra**

Give two functions f(x) and g(x) such that f(g(2))=7
*July 24, 2014*

**College Algebra**

give a logarithmic function g(x) such that g(49)=2
*July 24, 2014*

**College Algebra**

Give a piece-wise function p(x) where p(2)=5 and p(-1)=3
*July 24, 2014*

**maths**

As compared to its first year of operation, ABC Company grew 8% in the second year and an additional 2% per year for the next two years. If total growth for years 2-4 was $45,000 over the first year’s sales of $150,000, how much did ABC Company grow in year 2?
*July 22, 2014*

**art history **

A mastaba is:
*July 16, 2014*

**phys**

I got it now. (2c)(450-T) = (c)(T-300) Solve for T
*July 7, 2014*

**phys**

The heat capacity of object B is twice that of object A. Initially A is at 300 K and B is at 450 K. They are placed in thermal contact and the combination is isolated. The final temperature of both objects is: ans is 400 K how?
*July 7, 2014*

**phys**

The coefficient of expansion of a certain steel is 0.000012 per C^(degree) . The coefficient of volume expansion, in (C^(degree))^-1, is: A) (0.000012)^3 B) (4pi/3)(0.000012)^3 C) 3 x 0.000012 D) 0.000012
*July 7, 2014*

**algebra**

Find all zeros of the polynomial P(x)=x^3 - 2 x^2 - 9 x - 30.
*July 6, 2014*

**us hist**

In comprison with John Kennedy, Lyndon Johnson was A. better educated B. more skillful at working the congress C. a better public speaker D. personally more charismatic Ans: D Eisenhower's attempt to develop better soviet-american relations was severely hurt by the A. ...
*July 3, 2014*

**Psychology**

What is Classical Hierarchial Classification?
*June 30, 2014*

**psychology**

Which one of the following statements about intelligence is the most accurate a. Iq is a valid measurement, and environmental factors do not change mental ability b. Intelligence is mostlygenetic has the most variability between groups and is reliable regardless of the ...
*June 21, 2014*

**Algebra II**

Opps square root symbols didn't come out right sorry.
*June 15, 2014*

**Algebra II**

This is what it looks like: (¡Ìn + ¡Ìn − 1) (¡Ìn − ¡Ìn − 1) = 1 for n ¡Ý 1
*June 15, 2014*

**Algebra II**

I have the same question for homework.
*June 15, 2014*

**Algebra II**

And it is the (square root of n + the square root of n-1)(square root of n - square root of n-1)= 1 for n great than or equal to 1.
*June 15, 2014*

**Algebra II**

It is a fuction.
*June 15, 2014*

**geometry**

What inequality represents the sentence below? The product of a number and 5 is no more than 8. A. 5n < 8 B. 5n > 8 C. 5n>8 D.5n<8
*June 2, 2014*

**geometry**

Kristen lives directly east of the park. The football field is directly south of the park. The library sits on the line formed between Kristen’s home and the football field at the exact point where an altitude to the right triangle formed by her home, the park, and the ...
*June 2, 2014*

**nutrience**

What is the maximum heart rate for a 35-year-old? A. 121.1 B. 183.5 C. 187 D. 205.55
*June 2, 2014*

**us hist**

Grover Cleveland is to fathering a child out of wedlock as James G. Blaine is to: Questionable loyalty to his country Drug addiction Honesty Political reform None of the other answer choices is correct Not political reform. is it honesty....
*May 15, 2014*

**us hist**

You have many skills, a broad variety of work experiences and a college degree. Do you favor the Pendleton Act? Only in the eastern industrial regions Only in the southern states Yes No I know its not no. is it yes or..
*May 15, 2014*

**us hist**

Complete the following progression: AGRARIAN DISCONTENT; the GRANGE ASSOCIATION; FARMERS’ ALLIANCES; The Populist Party Unionization The election of Rutherford Hayes as President Coxey’s Army The Grange associations is it the populist party
*May 15, 2014*

**Physics**

whats the answer
*May 15, 2014*

**econimic**

Command economies: A. Are considered a type of mixed economy B. Are considered a type of free market economy C. Oppose private property, free market pricing, competition, and consumer choice D. Encourage private property, free market pricing, competition, and consumer choice
*May 12, 2014*

**science**

The answers to the whole test are... 1.TRUE 2.B 3.D 4.C 5.A 6.C 7.D I got 100% on the test So yes all of these are correct XD *o*
*May 11, 2014*

**Math**

Last will of an eccentric lady reads: I bequest $1000 less then one half of my estate to my beloved red cat. I bequest $800 less then one third of my estate to my favorite striped cat. I bequest $600 less then one quarter of my estate to my darling black cat. All my money must...
*May 8, 2014*

**Chemistry**

2 SO3^-2 + 2 H2O + 2e- -> S2O4^-2 + 4OH-
*May 4, 2014*

**Math 2**

Jsjjfdj
*May 2, 2014*

**phys**

never mind i got it.
*May 1, 2014*

**phys**

A disk with a rotational inertia of 2.0 kg.m^2 and a radius of 0.40 m rotates on a frictionless fixed axis perpendicular to the disk faces and through its center. A force of 5.0 N is applied tangentially to the rim. The angular acceleration of the disk is:
*May 1, 2014*

**chem**

One mole of pentanol (C5H11OH) contains how many hydrogen (H) atoms?
*April 27, 2014*

**science**

Given the following reaction: CaC2 + 2 H2O C2H2 + Ca(OH)2 How many moles of Ca(OH)2 will be produced if 5.800 g of CaC2 are reacted completely?
*April 27, 2014*

**phys**

A wheel starts from rest and has an angular acceleration of 4.0 rad/s^(2). When it has made 10 rev its angular velocity is:
*April 27, 2014*

**Chemistry**

You added how may mols NaOH? That's M x L = mols. What final volume do you have. You added 18.01 mL and 10 mL so total volume is 28.01 mL. Convert that to L., then M = mols/L Do I do 0.1M x .01801L = 0.001801mols? Then do M = 0.001801mols/0.02801L? I'm a little ...
*April 25, 2014*

**Chemistry**

I am trying to complete a lab called Precipitation Titration of Cobalt Chloride. I've done the experiment and I got that if you combine 18.01mL of 0.1M NaOH with 10mL of CoCl2, the precipitate is forms. Now how do I calculate the concentration of the amount of NaOH I added...
*April 25, 2014*

**Health**

What are the barriers that prevent older people from diverse groups from accessing mental health care for depression?
*April 24, 2014*

**Physics **

What is the partial pressure of water on a day when the temperature is 25C and the relative humidity is 33% P=___Pa
*April 22, 2014*

**statistics**

Using the 95% level of confidence, what is the confidence interval for the proportion of households represented at a town meeting
*April 21, 2014*

**Calculus Please Need Urgent3 :/**

Find the derivative of the following function using the appropriate form of the Fundamental Theorem of Calculus. F(x)= (s^2)/(1+3s^4)ds from sqrtx to 1 F'(x)=? Thank you so much guys!
*April 19, 2014*

**Calculus Please Need Urgent2 :/**

Consider the function f(x) whose second derivative is f''(x)=8x+4sin(x). If f(0)=3 and f'(0)=2, what is f(x)? f(x)=??
*April 19, 2014*

**Calculus Please Need Urgent :/**

Find the most general antiderivative of f(x)=–8e^x–6secant^2(x) where -pi/2<x<pi/2 Note: Any arbitrary constants used must be an upper-case "C". F(x)=?
*April 19, 2014*

**Calculus Help Please!**

If f(x)=Integral (t^3+6t^2+4)dt from 0 to x then f''(x)=?
*April 19, 2014*

**PLEASE HELP!**

Let integral f(x)dx=9 from -6 to -1.5 integral f(x)dx=7 from -6 to -4.5 integral f(x)dx=4 from -3 to -1.5 A. Find integral f(x)dx from -4.5 to -3 B. Find integral (9f(x)-7)dx from from -4.5 to -3
*April 19, 2014*

**u,s history**

By the end of April 1975, which city fell to the North Vietnamese Army, leading to the unification of Vietnam?
*April 15, 2014*

**pol201**

Fletcher v. Peck
*April 13, 2014*

**math**

This year, 75% of the graduating class of Harriet Tubman high school had taken at least eight math courses. Of the remaining class members,60% had taken six or seven math courses. What percentage of the graduating class had taken fewer than six math courses?
*April 8, 2014*

**Programing**

for(int i=0; i<3;i++){ for(int j=0; j<3;j++){ x2[i][j]=x1[i][j];}}
*April 1, 2014*

**science(check answers)**

1.D 2.A 3.A 4.C 5.FALSE I got 100% So yes these are all correct XD *o*
*March 31, 2014*

**math**

If the consumption function is C = $200 billion + 0.6Y, (a) How much do consumers spend with incomes of $8.25 trillion? I got 5.2 trillion for this. (b) How much do they save? ??
*March 29, 2014*

**math**

(b) Round to nearest two decimal places.
*March 29, 2014*

**math**

Suppose you borrow $1,000 of principal that must be repaid at the end of two years, along with interest of 5 percent a year. If the annual inflation rate turns out to be 10 percent, (a) What is the real rate of interest on the loan? For this I got -5%. (b) What is the real ...
*March 29, 2014*

**Math**

A pile of gravel is conical in shape. If the diameter is approximately 6.8m and the height is 2.8m, what is the volume of gravel in the pile?
*March 28, 2014*

**statistics**

If there are 18 blue socks and 24 black socks what is the probability of pulling out 2 black socks?
*March 26, 2014*

**Math - Quadratics & Analytical Geometry**

I have a test tomorrow with a few sample questions that are expected to be on the test that I do not know how to properly do. 1)Find the slope intercept equation of the line passing through the intersection of the lines 2x-4y=1 & 3x+4y=4 and parallel to the line 5x+7y+3=0 2)...
*March 23, 2014*

**math**

Nice! Thank You
*March 19, 2014*