Thursday

December 8, 2016
Total # Posts: 51

**Physics**

A car traveling at 71 km/h hits a bridge abutment. A passenger in the car moves forward a distance of 63 cm (with respect to the road) while being brought to rest by an inflated air bag. What magnitude of force (assumed constant) acts on the passenger's upper torso, which...

*March 3, 2016*

**Chemistry**

In a volumetric analysis experiment, a solution of sodium oxalate in acidic soltuion is titrated with a solution of potassium permanganate according to the following balanced chemical equation: 2KMnO4+8H2SO4+5Na2C2O4 -> 2MnSO4+8H2O+10CO2+5Na2SO4+K2SO4 What volume of .0239 M...

*February 28, 2016*

**physics**

To determine an athlete's body fat, she is weighed first in air and then again while she's completely underwater. It is found that she weighs 690 N when weighed in air and 36.0 N when weighed underwater. What is her average density?

*October 25, 2014*

**physics**

A spacecraft is traveling with a velocity of v0x = 5690 m/s along the +x direction. Two engines are turned on for a time of 845 s. One engine gives the spacecraft an acceleration in the +x direction of ax = 1.35 m/s2, while the other gives it an acceleration in the +y ...

*September 24, 2014*

**Math**

Thanks Steve

*September 17, 2014*

**Math**

Freddy and Frankie want to know their grandmother's age. She tells them that the digits of their age make up her age. She also tells them that their age plus her age total 83. What is the age of the grandmother? Please explain this question step by step.

*September 17, 2014*

**art history**

I don't really know how to explain the answer except by looking at said paintings. But the answer is David

*May 20, 2014*

**Math**

Shania is having trouble understanding her algebra assignment. To help her understand, she asks Mark why is not equal to . Which of the following responses would be best for Mark to give?

*August 5, 2013*

**Physics**

As its volume is doubled from an initial value of 0.088 m3, a sample of gas is held at a constant pressure of 3.4 × 104 Pa by heating. Then, while a constant volume is maintained, the gas is cooled back to its initial temperature. The work that the gas does on the ...

*June 21, 2012*

**Physics**

A system performs 349 J of work on its surroundings while losing 133 J of internal energy. Determine the heat transferred to the system during this process.

*June 21, 2012*

**Algebra 2 **

find all the zeros of the polynomial function F(x)= x^4+4x^3-6x^2-36x-27

*March 1, 2012*

**Math Urgent**

Two surveyors with two-way radios leave the same point at 9:00am., one walking due south at 2 mi/hr and the other due west at 5 mi/hr. How long can they communicate with one another if each radio has a maximum range of 10 miles?

*September 22, 2011*

**Algebra**

A rectangular plot of ground having dimensions 24 feet by 26 feet is surrounded by a walk of uniform width. If the area of the walk is 104 feet squared, what is its width?

*September 21, 2011*

**Algebra**

A boy can row a boat at a constant rate of 5 mi/hr in still water. He rows upstream for 19 minutes and then rows downstream, returning to his starting point in another 13 minutes. What is the rate of the current? What is the total distance traveled?

*September 12, 2011*

**English**

I know that 'you' and 'I' are pronouns but are words like 'you're' and 'I'm still classed as perosnal pronouns? thanks

*May 8, 2011*

**Chemistry**

How many moles of Mg2+ and NO3- form for each mole of Mg(NO3)2 that dissolves?

*November 8, 2010*

**chemistry**

How many H2O molecules are formed when 14 methanol molecules react?

*November 8, 2010*

**Algebra**

Indicate in standard form the equation of the line passing through the given points. A(4, 1), B(5, 2)

*June 25, 2010*

**algebra**

5/7-3/4=

*June 24, 2010*

**General Chemistry**

What is the molarity of a solution produced by dissolving 61 g of KNO3 in a 100 mL volumetric flask?

*June 6, 2010*

**Economics**

What will be the outcome to global economics and the condition of man given increasing global birth rates and why?

*May 20, 2010*

**Geometry**

What is the ratio of the area of triangle XBY to the area of triangle ABC for the given measuremnts, if XYis similar to AC, and BY=2 and BC=4?

*May 17, 2010*

**Geometry**

Is this true or false? Two similar hexagons have area 36 square inches and 64 square inches. The ratio of a pair of corresponding sides is 9/16.

*May 17, 2010*

**Geometry**

A circle has a radius of 6 inches. The circumscribed equilateral triangle will have an area of:?

*May 17, 2010*

**Geometry**

The shortest side of a polygon of area 196 square inches is 4 inches long. What is the area of a similar polygon whose shortest side is 8 inches long?

*May 17, 2010*

**Geometry**

i don't understand this

*May 17, 2010*

**Geometry**

One side of a triangle is 15 inches, and the area of the triangle is 90 square inches. What is the area of a similar triangle in which the corresponding side is 9 inches?

*May 17, 2010*

**Geometry**

What is the ratio of the area of triangle XBY to the area of the triangle ABC for the given measurements, if XY is similar to AC, and XY=2 and AC=3

*May 17, 2010*

**Geometry **

What is he ratio of the area of triangle XBY to the area of triangle ABC for the given measurements, if XY is similar to AC, and BY=3, YC=2 ?

*May 17, 2010*

**Geometry**

so 4/9 ?

*May 17, 2010*

**Geometry**

i don't seem to understand the concept

*May 17, 2010*

**Geometry**

BY=3, YC=2

*May 17, 2010*

**Geometry**

What is the ratio of the area of triangle XBY to the area of triangle ABC for the given measurements, if XY is similar to AC?

*May 17, 2010*

**Geometry**

A circle has a radius of 6 in. The inscribed equilateral triangle will have an area of: ?

*May 17, 2010*

**Geometry **

how would you write it with the root on top divided by another number?

*May 17, 2010*

**Geometry **

Two similar polygons have areas of 50 and 100 sq. in. What is the ratio of the length of a pair of corresponding sides?

*May 17, 2010*

**Geometry**

The sides of a quadrilateral are 3, 4, 5, and 6. What is the length of the shortest side of a similar quadrilateral whose area is 9 times as great?

*May 17, 2010*

**math**

To keep his wigwam

*March 2, 2010*

**Global History**

my name is kaley and i try but the material is just confusing sorry :/

*February 16, 2010*

**Global History**

How did the Alliances lead to world war 1? How did nationalism lead to world war 1?

*February 16, 2010*

**math**

What value of a makes f(x)=X^2 + (a/x) have a) a local minimum at x=2? b) a point of inflection at x=1?

*November 28, 2009*

**calculus**

find the points at which the graph of 4x^2 - 4x + 12y^2 -6y = 10 has a vertical and horizontal tangent line. For the vertical only solve for y and for the horizontal only solve for x. I got the deriviative to be: (8x-4)/(-24y + 6). For the horizontal, x = 1/2 For the vertical ...

*November 2, 2009*

**science**

Then is it zooplankton and sea anemone?

*August 30, 2009*

**science**

Which would be a pair of ecological equivalents? zooplankton andsea anemone salmon and seagull rattlesnake and desert rat elephant and hyena zebra and wild horse

*August 30, 2009*

**9th grade algebra**

how to do algebra

*April 6, 2009*

**math**

If Sally can paint a house in 4 hours, and John can paint the same house in 6 hours, how long will it take for both of them to paint the house? the answer is 2 hrs and 24 min. How did they come up with that?

*March 16, 2009*

**Literature**

All of them are A.

*February 5, 2009*

**Criminal Justice**

As a detective with a local law enforcement department, you are one of the first to arrive at the scene of a drive-by shooting, which resulted in the death of a teenage male. The shooting occurred at a corner gas station of a low-income neighborhood. A number of witnesses ...

*October 25, 2008*

**French**

i need to learn french

*May 20, 2008*

**math**

recall that the acceleartion due to earth's gravity is 32 ft/sec^2. from ground level, a projectile is fired straight upward with velocity 90 feet per second. a. what is its velocity after 3 seconds b. when does it hit the ground c. when it hits the ground, what's the ...

*January 6, 2008*

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