# Posts by jenna

Total # Posts: 656

**pleez! science stuff**

ohhh! thank you thank you thank you! soooooo much i really need it badly :)

*November 8, 2011*

**pleez! science stuff**

What is the application be on my project which was "me and my class go out and check the soil for organic things and beans and natural stuff + to describe what it looks like what color,shape,texture, and size the things we found are" PLEEZ! help i still have tons of ...

*November 8, 2011*

**Biochemistry**

The malate dehydrogenase reaction, written in the direction as it occurs in the citric acid cycle is: malate + NAD+ → oxaloacetate + NADH + H+ ΔG˚' = +7.1 kcal/mol Calculate the Keq and ΔG (in kcal/mol) for this reaction at the physiologic ...

*November 5, 2011*

**WRITING**

Like what bad stuff would happen to the school teachers and people

*October 27, 2011*

**WRITING**

Help me get examples of what would happen if there were fiel trips everyday for school for free. Help me come up what bad stuff would happen

*October 27, 2011*

**WRITING**

A field trip for free everyday at school. Examples they are bad?

*October 27, 2011*

**Probability math**

From a deck of 52 cards, 7 are drawn randomly without replacement. Let X and Y be the number of hearts and spades respectively . a) What is P(X > or = Y)?

*October 25, 2011*

**Probability**

Consider the experiment of simultaneously tossing a die and a coin. Let X denote the number of heads and Y denote the number of spots showing on the die. a)construct a two-way table for the joint pdf b)Let Z=X+Y . Use the joint pdf to find the distribution or Z.

*October 25, 2011*

**math**

What is the ratio formed between two parallelograms one is 2 inches by 6 inches and the other is 6 inches by 18 inches?

*October 24, 2011*

**physics**

we know that the speed of light in a vacuum is 3.0 x 10^8 m/s (18,000 mi/sec). If light travels through thick plastic with a speed of 1.75 x 10^8 m/s, what is the index of refraction through plastic?

*October 24, 2011*

**physics**

we know that the speed of light in a vacuum is 3.0 x 10^8 m/s (18,000 mi/sec). If light travels through thick plastic with a speed of 1.75 x 10^8 m/s, what is the index of refraction through plastic?

*October 24, 2011*

**physics**

An object is located 87.6 cm from a concave mirror that has a focal length of 17.0 cm. Where is the image located?

*October 24, 2011*

**Chemistry**

Nitrogen dioxide, NO2, dimerizes easily to form dinitrogen tetroxide , N2O4 : 2NO2<===>N2O4 a) Calculate Change in reaction G* and K for this equilibrium. b) Calculate the (e) (the measure of the progress of the reaction) for this equilibrium if 1.00 mol NO2 were present...

*October 20, 2011*

**chem help**

if 20 ml of .025M Formic acid is combined with 30 ml of distilled water and titrated with .10 M NaOH. What is the theoretical endpoint (equivalence point)

*October 19, 2011*

**Chemistry**

if 20 ml of Formic acid is combined with 30 ml of distilled water and titrated with .10 M NaOH. What is the theoretical endpoint (equivalence point)

*October 18, 2011*

**Social Studies**

Can you?

*October 18, 2011*

**Social Studies**

Hollywood sign. You can just look these up on Google :D There is a lot of answers

*October 18, 2011*

**Social Studies**

Thanks (:. What famous sign was first erected in 1923 in the state of California?

*October 18, 2011*

**Social Studies**

In 1950, what west coast team became an official member of the NFL?

*October 18, 2011*

**Physics**

An airplane pilot sets a compass course due west and maintains an airspeed of 221km/h . After flying for a time of 0.490h, she finds herself over a town a distance 125km west and a distance 13km south of her starting point. FIND THE MAGNITUDE OF WIND VELOCITY. v = ___ km/h

*September 26, 2011*

**Astronomy**

Star 'A' has twice the radius of star 'B'. The ratio of the surface area of star 'A' to the surface area of star 'B' is equal to 8 4pi 2 1/8 4

*September 25, 2011*

**UCSD**

A jetliner is moving at a speed of 230 m/s. The vertical component of the plane's velocity is 36.4 m/s. Determine the magnitude of the horizontal component of the plane's velocity.

*September 24, 2011*

**physics**

A jet travels at 490 m/s. How long does it take to travel 227m? Answer in units of s

*September 24, 2011*

**Math**

solve for x Pc/x = c/p

*September 19, 2011*

**physics**

I am looking out a window that is 1.3m tall. A water balloon suddenly drops across the entire length of the window in .22 seconds. How far above the window was it dropped?

*September 19, 2011*

**chemistry**

At 518 degress celsius that rate of decomposition of a sample of acetaldehyde, initially at a pressure of 363 torr, was 1.07 Torr/sec when 5% had reacted, and 0.760 torr/sec when 20% had reacted. What is the order of the reaction?

*September 10, 2011*

**Science**

At 518 degress celsius that rate of decomposition of a sample of acetaldehyde, initially at a pressure of 363 torr, was 1.07 Torr/sec when 5% had reacted, and 0.760 torr/sec when 20% had reacted. What is the order of the reaction?

*September 10, 2011*

**Math**

A turtle is at the bottom of a 12 foot well. Each day it crawls up 3 feet, but each night it slips back 2 feet. After how many days will the turtle reach the top of the well? ANSWER: The turtle will reach the top of the well after [ ] days... Thanks

*September 5, 2011*

**Biochemistry**

Which of the following peptide fragments would you expect to find buried in the center of a water soluble protein? Explain your answer. a) DEGKRGDK b) ALVWIFLF

*September 3, 2011*

**Math**

If you are getting a B in everything else in this class but you don't do any of the news item write ups(which are 9% of your grade, then will your final grade be a B? If not a B, then what will your final grade be?

*September 2, 2011*

**Math**

Would this be a positive, nenegative or no correlation? The number of calories burned and the time spent exercinsing

*August 30, 2011*

**6th grade math**

Total tickets sold$1625. Adults $7,kids $3. Twice as many kids as adults bought tickets. How many adults and kid tickets were sold.

*August 24, 2011*

**6th grade math**

Total tickets sold$1625. Adults $7,kids $3. Twice as many kids as adults bought tickets. How many adults and kid tickets were sold.

*August 24, 2011*

**Math**

Write the following without negative exponents: (a^-1 + b^-1)^-1

*August 20, 2011*

**Math**

Solve the following equation for t : 3/t + 2/m = 2

*August 18, 2011*

**college math**

Using correct mathematical notation and symbols, express the following in set-builder notation: Z = {16, 17, 18, 19, 20}

*July 8, 2011*

**Math**

Given A = {1, 2, 3}, B = {3, 4, 5, 6,}, and C = {3, 5, 7}. Evaluate each set a) A ∩ B b) A U C c) B U C d) (A U B) ∩ C e) A U (B U C) f) (A ∩ B) ∩ C g) (A ∩ B) U C

*July 8, 2011*

**Math-geometry**

Given these sets: A = {3, 4, 5, 6, 7} B = {6, 7, 8, 9} C = {2, 4, 6, 8} List the elements of this set A intersect(B∩C)

*July 7, 2011*

**Math**

Given the following set, select the statement below that is true. V = {a, e, i, o, u} s ∈ V o ∉ V e ∈ V V intersect Ø w ∈ V

*July 7, 2011*

**Math**

Given the following sets, select the statement below that is true. A = {l, a, t, e, r}, B = {l, a, t, e}, C = {t, a, l, e}, D = {e, a, t} B ⊂ C and C ⊆ A C ⊆ B and D ⊂ B D ⊂ A and A ⊂ D B ⊂ A and C ⊂ D D ⊆ A and A ⊂ C

*July 7, 2011*

**Geometry-help please :(**

Given the following sets, select the statement below that is true. A = {l, a, t, e, r}, B = {l, a, t, e}, C = {t, a, l, e}, D = {e, a, t}

*July 7, 2011*

**Math**

Given the following set, select the statement below that is true. V = {a, e, i, o, u}

*July 7, 2011*

**Math**

Given the following set, select the statement below that is true. V = {a, e, i, o, u}

*July 7, 2011*

**Math**

Given the following sets, select the statement below that is true. A = {l, a, t, e, r}, B = {l, a, t, e}, C = {t, a, l, e}, D = {e, a, t}

*July 7, 2011*

**math**

so its 225pi sq. in?

*July 4, 2011*

**math**

what is the exact area of a circle with a diameter of 15 inches?

*July 4, 2011*

**math**

i think its 16.49 in^3 right?

*July 3, 2011*

**math**

how many cubic inches of ice cream can an ice cream cone hold (within the cone) if its height is 7 inches and the diameter of its base is 3 inches? give solution accurate to the nearest hundredth.

*July 3, 2011*

**math**

i don't think im getting this problem...would it be 20 * 52 = 1040 mm? PLEASE ASSIST :(

*July 3, 2011*

**math**

im still a little confused with this problem....

*July 3, 2011*

**math**

i think P = a + b + c right? and A = 1/2bh right?

*July 3, 2011*

**math**

find the perimeter and area of a right triangle if the shortest side is 20 mm. and the longest side is 52 mm. include correct units with each part in solution.

*July 3, 2011*

**math**

would i use a^3?

*July 3, 2011*

**math**

how many cubic cm can a cigar box hold if its dimensions are 4 cm. by 14 cm. by 12 cm? include correct units with solution.

*July 3, 2011*

**math**

i thought that was how you solve it. thanks!

*July 3, 2011*

**math**

in a 9 in. sq. cake pan and 1 10 in. sq. cake pan, what is the difference in volume each pan will hold? assume each pan is 3 in. high. show step by step work and correct units with solution.

*July 3, 2011*

**math**

that's what i got. thank u :)

*July 3, 2011*

**math**

exactly how many cubic inches of ice cream can an ice cream cone hold (within the cone) if its height is 6 inches and the radius of its base is 2.5 inches? include correct units with the solution. use "pi" in place of the pi symbol.

*July 3, 2011*

**math**

i am not sure....

*July 3, 2011*

**math**

how many cubic cm can a cigar box hold if its diameter is 4 cm by 10.5 cm by 7 cm?

*July 3, 2011*

**math**

a right triangle has to be 90 degrees right?

*July 3, 2011*

**math**

find the perimeter and area of a right triangle if 1 leg measures 10 ft. and the other leg measures 24ft. show all work please.

*July 3, 2011*

**math**

okay but the options i have to choose from are: a. 26Pi in. b. 6.5Pi in. c. 13Pi in. d. 42.25Pi in. e. 169Pi in. i think it's a. right?

*July 3, 2011*

**math**

the pi is 3.14

*July 3, 2011*

**math**

i am confused??

*July 3, 2011*

**math**

what is the exact circumference of a circle with a diameter of 13 inches?

*July 3, 2011*

**math**

i got that too! thank u :)

*July 3, 2011*

**math**

Find the area of a square if 1 side measures 22 cm. Include correct units with solution.

*July 3, 2011*

**math**

l * w right?

*July 3, 2011*

**math**

Find the area of a rectangle if its length measure 12 cm and its width measures 13 cm. Include correct units with the solution.

*July 3, 2011*

**Differential Equations**

A car is traveling at 70 mph skids 240 ft after it's breaks are suddenly applied. Assuming that the cars breaking system provides a constant deceleration, find that deceleration. How long did it take the car to stop?

*June 19, 2011*

**global history.**

What did people in Ancient Greece trade with other countries? What were the trade routes, what did they trade, and finally, what was the effect on Greece ?

*June 7, 2011*

**math**

A vase in the shape of a sqare based pyramid just fits inside a box in the shape of a square based prism. If the prism has the volume of 720 cm then what is the volume of the vase?

*May 29, 2011*

**english**

What value does Macbeth put on his soul in Act III, Scene I of "Macbeth" by Shakespeare.

*May 17, 2011*

**Physics**

a chain pulls tangentially on a 33.4kg uniform cylindrical gear with tension of 70.1 N. the chain is attached along outside radius at 0.794m from the axis of rotation. starting from rest gear takes 1.59 s to reach rotational speed of 1.08 rev/s. what is total frictional torque...

*May 10, 2011*

**Physics**

A boy of mass 37.8kg. is rescued from a hotel fire by leaping into a firefighters' net. The window from which he leapt was 8.02 above the net. The firefighters lower their arms and he lands in the net so that he is brought to a complete stop in a time of 0.491 s. What is ...

*May 9, 2011*

**8th grade algebra: radicals**

please help me solve these 1. 2√5/8 + 4√3/8 - 1/2√68 2. √4k-5 +1=8 (the radical sign goes over 4k-5) 3. (x+4)*2 /3 =8 4. Write the value of the discriminant of each equation. Then use it to decide how many different real-number roots the equation has. x...

*May 6, 2011*

**Programming Logic**

I need to create a flowchart/psuedocode for a dice game that give you 2 rolls with 5 dice, 3 rolls per game. the computer will roll the 4 dice and calculate your score. my question is...do i need to repeat this 3 times and can i use nested loops and if so..how do i set this up...

*April 27, 2011*

**physics**

Dispersion in a window pane. In the figure on the left, a beam of white light is incident at angle θ = 51° on a common window pane (shown in cross section). For the pane's type of glass, the index of refraction for visible light ranges from 1.528 at the blue end ...

*April 17, 2011*

**chemistry**

5.00 atm

*March 31, 2011*

**Chem**

H2SO4 +NaCO3 > Na2SO4 +Co2 +H2O if 150.0 g Of Sulfuric acids is spilled what is the minimum number of moles of sodium carbonate to complete this reaction?

*March 26, 2011*

**pre calc**

lnX + ln2 = 3

*March 24, 2011*

**biology / help me**

The hemophilia gene is located 12 map units from the red-green colorblindness gene on the X chromosome. Red-green colorblindness is recessive to normal color vision. A woman with normal blood clotting and normal color vision, but whose father was a hemophiliac and whose mother...

*March 17, 2011*

**please help me**

The hemophilia gene is located 12 map units from the red-green colorblindness gene on the X chromosome. Red-green colorblindness is recessive to normal color vision. A woman with normal blood clotting and normal color vision, but whose father was a hemophiliac and whose mother...

*March 17, 2011*

**biology /help**

. The hemophilia gene is located 12 map units from the red-green colorblindness gene on the X chromosome. Red-green colorblindness is recessive to normal color vision. A woman with normal blood clotting and normal color vision, but whose father was a hemophiliac and whose ...

*March 17, 2011*

**Chemistry**

An unknown compound X is one of the four compounds listed in the table below. A mixture of X with o-toluic acid melts at 100 degrees Celsius, a mixture of X with benzoic acid melts at 112 degrees Celsius, a mixture of X with phenyl succinate melts at 110 degrees Celsius, and a...

*March 14, 2011*

**chemistry**

Ok now I have to find the mole fraction of the solvent. I know the formula, which is the moles of a substance/ total moles of solution. Is the moles of the substance the number we just obtained? And which is the "total" moles of solution?

*March 3, 2011*

**chemistry**

Sorry the 18.02 is for water.

*March 3, 2011*

**chemistry**

To find the moles of solvent present, would you divide the mass the solvent by 18.02g/mol? I am given this: MM=18.02g/mol

*March 3, 2011*

**chemistry**

How do you find the mass of a solution if you have 1L of 2.5 M MgCl2. I have determined how many moles are present in MgCl2 which was 2.5 and how grams are present which came out to be 238.025g Now I'm asked "What is the mass of the solution and the mass of the ...

*March 3, 2011*

**Organic Chemistry**

What is the major product from the sulfuric acid and Hg(II)-catalyzed hydration ethynylcyclohexane?

*March 3, 2011*

**math**

21girls to 15boys

*February 14, 2011*

**math**

Yes, thank you for thw awswers to my homework.

*February 9, 2011*

**math**

Thanks guys that really helped me on my homework :D im in 5th grade

*February 9, 2011*

**physics**

M*9.8*sin23=540 M*9.8=540/sin23 =1382.02 M=1382.02/9.8 =141.02kg M=141.02kg

*February 3, 2011*

**Math**

a building cast a 235 ft shadow along the ground. the angle of the sun's ray with the ground is 24 degrees. How tall is the building?

*February 1, 2011*

**eth/125**

How do you think slavery influenced the evolution of both Black and White America today?

*January 31, 2011*

**Math**

I still don't get it..?

*January 31, 2011*

**Math**

24 - 20 = 4

*January 31, 2011*

**Math**

4, but they're asking what's the mistake that was made in the problem. Because 100 isn't the correct answer.. I'm really stumped on this. :(

*January 31, 2011*