# jenna

Most popular questions and responses by jenna-
## Science

1. Which of the following is an example of matter? (1 point) leaves shadows light from the sun sound 2. Which of the following is an example of a chemical property of matter? (1 point) ability to melt ability to freeze ability to react

*asked on February 26, 2014* -
## Physical science

When you drop a 0.36 kg apple, Earth exerts a force on it that accelerates it at 9.8 m/s^2 toward the earth's surface. According to Newton's third law, the apple must exert an equal but opposite force on Earth. If the mass of the earth 5.98x10^24 kg, what

*asked on February 17, 2008* -
## statistics

The Information Systems Audit and Control Association surveyed office workers to learn about the anticipated usage of office computers for personal holiday shopping. Assume that the number of hours a worker spends doing holiday shopping on an office

*asked on April 4, 2017* -
## H. CHemistry

if the atmosphere can support a column of mercury 760 mm high at sea level, what height of a hypothetical liquid whose density is 1.40 times the density of mercury could supported?

*asked on January 30, 2013* -
## ap chemistry

what volume of 0.0100 M NaOH must be added to 1.00 L of 0.0500 M HOCl to acheive a PH of 8.00?

*asked on March 1, 2012* -
## 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

*asked on September 5, 2011* -
## math

Max, James, and Brett were playing basketball. One of them broke a window, and the other two saw him break it. Max said, "I am innocent." Jamess said, "Max and I are innocent." Brett said, "Max and James are both innocent." If only one of them is telling

*asked on October 5, 2009* -
## Business Consulting, Intro to Computers

• Bill wants the entry in Column G to remind him of expenses that require receipts for the accountant. Tell Bill what to put in Column G to do this: a. Print the word “Yes” in any row where the total daily expenses are greater than or equal to

*asked on October 15, 2015* -
## Asoka rule

What are stupas How did asokas rule lead to a prosperous India How did Asoka do after the war with Kalinga

*asked on October 24, 2018* -
## Chemistry

Nitrogen dioxide, NO2, dimerizes easily to form dinitrogen tetroxide , N2O4 : 2NO2N2O4 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

*asked on October 20, 2011* -
## Chemistry

How many electrons and how many protons are in the ion Cr6+?

*asked on February 19, 2010* -
## science

name a chemical sometimes used to make the specimen visible on a microscope. answer needs to be 5 leters stain thank you tell me an example of solidification.. please :) When water, a liquid, freezes to a solid, ice. Also called crystallization. stage

*asked on September 8, 2006* -
## Physics

The wheels, axle, and handles of a wheelbarrow weigh W = 65 N. The load chamber and its contents weigh WL = 538 N. The drawing shows these two forces in two different wheelbarrow designs. To support the wheelbarrow in equilibrium, the man’s hands apply a

*asked on December 1, 2014* -
## algebra

110 students like the program. 120 students think the program is unnecessary. 210 students plan on running for student government next year. If a circle graph were made from the data, what is the measure of the central angle for the group that likes the

*asked on May 19, 2014* -
## Calculus

I'm having trouble with the following problem: Find the volume of the solid generated by revolving the region about the given line. The region is in the first quadrant bounded above by the line y= sqrt 2, below by the curve y=secxtanx, and on the left by

*asked on September 22, 2009* -
## physical science

when a physical change in a sample occurs which of the following does not change? a. shape b. temperature c. volume d. composition d?

*asked on December 8, 2017* -
## english

What argument does the other man use to convince the narrator to team up with him? What lesson do you think the narrator learned by the end of the evening?

*asked on January 28, 2012* -
## Statistics

A brewery's filling machine is adjusted to fill bottles with a mean of 32.6 oz. of ale and a variance of 0.004. Periodically, a bottle is checked and the amount of ale noted. (a) Assuming the amount of fill is normally distributed, what is the probability

*asked on February 15, 2013* -
## Gen. Chemistry

How do I "determine the mass percent of H2O in the hydrate Cr(NO3)3 * 9H2O to 3 significant figures"?

*asked on September 30, 2007* -
## algebra

Sara goes on a slingshot ride in an amusement park. She is strapped into a spherical ball that has a radius of centimeters. What is the volume of air in the spherical ball?

*asked on January 5, 2016* -
## college pre calculus

A kite frame is to be made from 6 pieces of wood. The four border pieces have been cut 5 and 12. The long center piece is 13. what should the length of the cross pieces be in order to maximize the area of the kite.

*asked on February 23, 2016* -
## 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

*asked on April 17, 2011* -
## Physics 2

Using the diagram to the left, rank each of the given paths on the basis of the change in electric potential. Rank the largest-magnitude positive change (increase in electric potential) as largest and the largest-magnitude negative change (decrease in

*asked on February 16, 2015* -
## Spanish

Grammatically correct? Mi hermana es muy trabajadora? Correct

*asked on October 27, 2016* -
## Chemistry

The oxidation of iodide ions by arsenic acid in acidic aqueous solution occurs according to the net reaction H3AsO4 + 3I – + 2 H3O +→ H3AsO3 + I3– + H2O. The experimental rate law for this reaction is Rate = k [H3AsO4] [I–] [H3O+]. According to the

*asked on April 22, 2017* -
## social studies

In 1846, the population of San Francisco, California, was only 200. By 1852, the city's population was 36,000. Which contributed the most to San Francisco's population change? (5 points) The Gold Rush The Mexican-American War The Monroe Doctrine The Trail

*asked on February 25, 2014* -
## Chemistry

Determine the molarity of a 15.0 % by mass Hydrogen Peroxide solution. The density of Hydrogen Peroxide is 1.054 g/mL. The 15.0% by mass can be broken apart into 15.0 g Hydrogen Peroxide and 100.0 g solution. Use the density of Hydrogen Peroxide solution

*asked on February 1, 2015* -
## chemistry

enzymes convert glucose M=180.2 to ethanol M=46.1 according to the equation C6H12O6=2C2H5OH + 2CO2 what is the maximum mass of ethanol that can be made from 15.5 kg of glucose?

*asked on May 4, 2013* -
## Math- I'd really appreciate it if you could help!!

Point $G$ is the midpoint of median $\overline{XM}$ of $\triangle XYZ$. Point $H$ is the midpoint of $\overline{XY}$, and point $T$ is the intersection of $\overline{HM}$ and $\overline{YG}$. Find the area of $\triangle MTG$ if $[XYZ] =150$.

*asked on April 21, 2016* -
## algebra

Can someone explain how to do this???? Write each expression using a single exponent. x^9/x^2 Answers: x^11 x^7 7 x^5

*asked on June 6, 2014* -
## unit rate

find the unit rate $920 for 40 hours

*asked on April 14, 2009* -
## English writing a concluding paragraph

My essay is about conformity and rebellion. I need a really good conclusion. My intro is this: In life there will be certain situations in which we will have to stay in order or choose to make our decisions ourselves. For example there will be times when

*asked on September 19, 2013* -
## Physics

A 50.0 g bullet strikes a 7.00 kg stationary wooden block. If the bullet becomes embedded in the block, and the block with the embedded bullet moves off at a velocity of 5.00 m/s, what was the initial velocity of the bullet?

*asked on August 16, 2015* -
## Chemistry

A car air bag requires 70. L of nitrogen gas to inflate properly. The following equation represents the production of nitrogen gas: 2NaNsubscript3 -> 2Na + 3Nsubscript2 The density of nitrogen gas is typically 1.16g/L at room temp. Calculate the number of

*asked on January 9, 2010* -
## Physics: Oscillations and spring constant

A student measured 15s for the 20 complete oscillations for an object of 200g attached at the free end of a spring. Calculate the period of oscillation (T) and the spring constant (k). My work (just wanted to ask for opinions if this is right): T =

*asked on June 26, 2016* -
## Kinematics

A car is travelling north on a highway at 25 m/s. Just as the car crosses a perpendicularly intersecting crossroad, the passenger throws out a can horizontally, towards the east. The initial speed of the can relative to the car is 10 m/s. It is released at

*asked on July 3, 2019* -
## Physics

A 69.5kg football player is gliding across very smooth ice at 2.15m/s . He throws a 0.470kg football straight forward. What is the player's speed afterward if the ball is thrown at 16.0m/s relative to the ground? What is the player's speed afterward if the

*asked on May 27, 2014* -
## chemistry

if 30ml of .150 M CaCl2 is added to 22.5ml of .1 M AgNO3, what is the mass of the AgCl precipitate?

*asked on October 11, 2010* -
## Science

How long does it take for a stable environment to become a climax community?

*asked on April 15, 2019* -
## Geometry

The midpoint of the segment joining points (a, b) and (j, k) is: (j-a,k-b) j-a over 2 k-b over 2 (j+a,k+b) j+a over 2 k+b over 2

*asked on January 16, 2012* -
## math

Tyrone has $60 and his sister has $135. Both get an allowance of $5 each week. Tyrone decides to save his entire allowance, but his sister spends all of hers each week plus an additional $10 each week. After how many weeks will they each have the same

*asked on June 2, 2007* -
## 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

*asked on September 26, 2011* -
## Calculus

Approximate the change in the lateral surface area(excluding the area of the base) of a right circular cone fixed height of h = 6m when its radius decreases from r=9m to r=8.9m (S=(pi)r sqrt(r^2+h^2)).

*asked on May 3, 2016* -
## Math xc

I've tried and tried to answer this question..I just hate math and math hates me. So let's get to the point why you are all here 1:Find the unit price for each option below. Round to the nearest cent when necessary. Indicate which option is a better buy.

*asked on February 26, 2014* -
## math

Riding on a school bus are 20 students in 9th grade, 10 in 10th grade, 9 in 11th grade, and 7 in 12th grade. Approximately what percentage of the students on the bus are in 9th grade?

*asked on October 6, 2014* -
## 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?

*asked on September 19, 2011* -
## physic angular momentum and torque

Calculate the mass m needed in order to suspend the leg shown in the figure(Figure 1) . Assume the leg (with cast) has a mass of 15.5kg , and its CG is 35.5cm from the hip joint; the sling is 76.5cm from the hip joint.

*asked on March 29, 2014* -
## chem

A chemist requires some 3-hexanone for a reaction, but only has some 3-hexene available. Explain using chemical reactions, how the 3-hexene could be converted to 3-hexanone. Include the conditions needed for each step. (You will need two steps).

*asked on October 5, 2009* -
## Calculus 1

(1 point) Write an expression for the function, f(x), with the properties. f′(x)=(ln(x)2)/x and f(3)=7. f(x)=∫t=b t=a

*asked on December 5, 2018* -
## Math please help hurry

A submarine is travelling parallel to the surface of the ocean at a depth of 626m. It begins a constant ascent in order to reach the surface after travelling a distance of 4420m. The ascent takes 35mins. A.) what angle of ascent or angle of elevation would

*asked on December 9, 2013* -
## math

a company employs 12 gardeners at $26 per day , and 8 clerks at $17 per day. What is the mean daily wage,in dollars,of the 20 employees?

*asked on April 28, 2013* -
## math

How many paths spell STATISTICS using Pascal's triangle? S T T A A A T T T T I I I S S T I I C C C S S Thanks in advance

*asked on October 19, 2016* -
## math

The mean salary of 5 employees is $34600. The median is $35700. The mode is $3700. If the highest paid employee gets a $3900 raise, then what is the new mean, median and mode?

*asked on June 13, 2015* -
## trigonometry

given v=5i+3j and w=-4i+8j, find projwv

*asked on May 17, 2012* -
## Chemistry

The phosphoric acid in a 100.00 mL sample of a cola drink was titrated with 0.1476 M NaOH. The first equivalence point was detected after 13.32 mL of base added, and the second equivalence point after 28.65 mL. Calculate the concentration of H2PO4- in

*asked on January 29, 2010* -
## physics

A person standing on a vertical cliff a height h above the lake wants to jump into the lake but notices a rock just at the surface level with its furthest edge a distance s from the shore .The person realizes that with a running start it will be possible

*asked on June 14, 2017* -
## History

What does the phrase "without transcending its authority" suggest about Jackson? Jackson is concerned about abusing the power he has been given. Jackson wants to unite the states but does not have enough control of Congress. Jackson feels the Congress has

*asked on April 11, 2017* -
## calculus

A particle moves in a straight line with velocity given by v(t) =sin t metres per second. Find the total distance travelled by the particle in the first 4 seconds of motion

*asked on February 14, 2012* -
## Physics

A golf ball is hit with an initial velocity of 15 meters per second at an angle of 35 degrees above the horizontal. What is the vertical component of the golf ball's initial velocity? a)8.6 m/s b)9.8 m/s c)12 m/s d)15 m/s I know you use 15cos 35 feta to

*asked on February 3, 2014* -
## AP English

what is the tone of "The Ash Guy" by Thomas Beller

*asked on August 5, 2019* -
## Science

How would you explain a bottle moving across the water in the same direction that the waves are traveling? Make a drawing of the bottles movement

*asked on February 19, 2019* -
## Physics

Hi, A squash ball of mass 0.035 kg hits the wall at speed of 78 m/s and rebounds straight back at 61 m/s. The ball is in contact with the wall for 0.44 s. a) What is the original momentum of the squash ball? 2.73 kg-m/s b) Calculate the impulse imparted to

*asked on January 12, 2019* -
## Physics

Hello, A soccer player kicks a ball straight up in the air at 18 m/s. What is the balls total hang time? 3.68 s What is the maximum height reached by the ball? 16.53 m When is the ball 12 m above the ground? Vavg = (v+vnaught)/2 Vavg= (18+0)/2 Vavg=9m/s

*asked on January 11, 2019* -
## Economics

The elasticity of the demand for labor in the Western Europe and Nordic countries is between -0.3 and -0.45. However, in Eastern European countries it is greater than -0.9. Why might this be the case? Suggest two reasons for the higher elasticity.

*asked on November 26, 2018* -
## Biology

A heterozygous brown mouse is crossed with a homozygous white mouse. What are the genotypes and phenotypes of the offspring? If these mice had 3 offspring, what is the probability that all 3 would be white?

*asked on January 21, 2018* -
## pre-calc college

a certain type of fencing comes in rigid 10 foot long sections. Four uncut segments are to be used to fence in a garden on the side of a building. what value of x will make the garden as large as possible?

*asked on January 31, 2016* -
## AP Chemistry

A precipitate is formed by adding 20.0 ml of 0.200M of sodium phosphate to 30.0 ml of 0.50M Copper sulfate. Please write the ionic equation Sodium phosphate and copper sulfate are both soluble, whilst copper phosphate is not. So, copper ions meet phosphate

*asked on January 5, 2007* -
## Math with business apps

Tom invested $7,000 at 6.5% interest compounded monthly. How much will be in this account after 18 months?

*asked on November 24, 2014* -
## physics

A dog searching for a bone walks 2.87 m south, then runs 22.5 m at an angle 30.5 north of east, and finally walks 5.91 m west. Find the direction of the dog's resultant displacement vector. Give your answer as an angle in degrees, with the angle measured

*asked on September 6, 2007* -
## Physics

A particular guitar string is supposed to vibrate at 220 , but it is measured to vibrate at 230 . By what percent should the tension in the string be changed to correct the frequency? I have been working for 7 hours of hw! Please help!

*asked on November 15, 2010* -
## math please help

Medians line AX and line BY of triangle ABC are perpendicular at point G. Prove that AB = CG. In your diagram,

*asked on April 23, 2015* -
## math

in the town hall meeting room, i sit in the fourth row from the front, whcih is also the twelfth row from the back. each row has 14 seats. how many people can be seated in the meeting room? is it 14*15 ?

*asked on August 13, 2018* -
## PHYSICS-HELP!!

Two bicyclists, starting at the same place, are riding toward the same campground by two different routes. One cyclist rides 1500 m due east and then turns due north and travels another 1430 m before reaching the campground. The second cyclist starts out

*asked on September 16, 2010* -
## physical science

which of the following are pure substances? a. solutions b. compounds c. homogeneous mixtures d. colloids A?

*asked on December 8, 2017* -
## physics

A dog searching for a bone walks 4.31 m south, then runs 8.93 m at an angle 22.0 north of east, and finally walks 10.0 m west. Find the magnitude of the dog's resultant displacement vector.

*asked on September 6, 2007* -
## Science

A biologist is constructing a battle graph to show the evolutionary relationships between the animals shown below. If anatomical features are used to constrays rhebcladogram, which animal will be placed farther from the animal shown. The animal shown is a

*asked on January 11, 2019* -
## History Essay-english problem

In my opening sentence for my essay "Weaknesses of the Articles of Confederation" should I write "The Articles of Confederation were the first governing document of the United States of America." or should I write "The Articles of Confederation was the

*asked on February 26, 2007* -
## Math Help!

is 10 000 more than 881 462 is 1000 000 less than 2 183 486 is 1 000 000 more than 746 000 is 1 000 000 less than 624 327 207

*asked on October 1, 2012* -
## 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.

*asked on July 3, 2011* -
## AP Chemisty

N2(g)+3F2 yields 2Nf3(g) Delta H(degree)298=-264KJ mol-1;Delta S(degree)298=-278J K-1 mol-1 The following questions relate to the synthesis reaction represented by the chemical equation above. a.)CAlculate the value of the standard free energy change,

*asked on June 7, 2007* -
## science

the acceleration of the gravity on the moon is 1.62m/s^2. if a ball is dropped on the moon from a height of 1.50m, determine the time for the ball to fall the surface of the moon

*asked on February 6, 2019* -
## Math with business apps

Young and Company owes bond holders $5,500 interest at the end of each quarter for the next five years. How much must they deposit now at 8% interest compounded quarterly to yield an annuity payments of $5,500?

*asked on December 6, 2014* -
## spelling

what is the analogy for thorn

*asked on January 11, 2011* -
## biology

why are animals shaped differently in cooler climates than in warmer ones?

*asked on August 21, 2008* -
## chemistry

A 100.0 mL sample of 0.300 M Ca(OH)2 is mixed with 100.0 mL of 0.700 M H3PO4 in a coffee cup calorimeter.If both solutions were initially at 35.0 °C and the resulting solution had a temperature that was recorded at 39. 7°C, determine the ΔHrxn in units

*asked on April 25, 2016* -
## 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

*asked on March 14, 2011* -
## science

why does a candle appear to go out when a copper coil is placed over the flame? Combustion requires three things: fuel (wax here), oxygen (air here), ignition temperature (a match here probably). Remove one and the combustion stops -- that's the principles

*asked on June 21, 2006* -
## math

Take west to be the positive direction. The height of a sloped roof above the place where I stand is h = 12 feet (see the figure below). If I move 3 feet west, the height is 10 feet. If I move 2 additional feet west, what is the height of the roof above

*asked on April 5, 2014* -
## algebra

Find the mean for each set of data. Round to the nearest tenth if necessary 12, 20, 8, 15, 16, 14, 7, 5, 11, 8, 14 i realy need help on this i keep on getting 12 as the median but the answer choices don't have 12, could u guys help me please

*asked on December 9, 2011* -
## Physics

Given: g=9.81 m/s square. The parachute on a race car that weighs 8042 N opens at the end of a quarter-mile run when the car is traveling 35 m/s. What net retarding force must be supplied by the parachute to stop the car in a distance of 1020 m? Answer in

*asked on February 25, 2008* -
## Chem

Question: "Calculate the theoretical yield of calcium carbonate of you react 2.55g of calcium chloride dihydrate with an excess amount of sodium carbonate." I got the molar mass of calcium chloride dihydrate which is 131.015 g/mol, but Im not sure how to

*asked on October 8, 2007* -
## Math

How many pairs of parallel edges does a rectangular solid have?

*asked on August 5, 2015* -
## physics

spherical aluminum ball of mass 1.22 kg contains an empty spherical cavity that is concentric with the ball. The ball just barely floats in water.Calculate the radius of the cavity.

*asked on October 5, 2010* -
## physics

A pump is installed in the basement of a 10-storey building in order to supply the occupants with water. Each storey is 3m high. How much pressure must the pump exert on the water so that the water reaches the 10th floor with a pressure of 400 kPa?

*asked on September 1, 2010* -
## Calc

Use differentials to approximate the value of the 4th root of 82 How do I even start?

*asked on October 25, 2016* -
## Math

A 40-foot by 10-foot rectangular garden is enclosed by a fence. To make the garden larger, while using the same amount of fencing, its shape is changed to a square. How many square feet larger than the old garden is the new garden?

*asked on March 26, 2015* -
## Calculus 1

Find the positive critical point of the function f(x)=x/(x^6+9)

*asked on November 14, 2018* -
## math

A game is defined by the rules that two dice are rolled and the player wins varying amounts depending on the sum of the two dice rolled based on the following table: Sum 2 3 4 5 6 7 8 9 10 11 12 Winnings $10 $9 $8 $7 $6 $5

*asked on December 19, 2016* -
## Calc

You plan to paint a sphere of radius 200 cm with a coat of pain .2 cm thick. Use differentials to approximate the amount of paint that is needed. Use the equation for the volume of a sphere.

*asked on October 26, 2016* -
## chemistry

how to prepare 500ml of a 0.75M Sodium Phosphate buffer solution at pH 7.5, how would you go about doing that?

*asked on May 18, 2015*