# Jack

Most popular questions and responses by Jack-
## EDTECH

UNIT 4 lesson 4 All of this information is part of a ___ in a database. a. record b. row c. column d. field What other information do you need to add to complete the database above? a. cell fill color b. fields c. field names d. borders

*asked on November 13, 2014* -
## Chemistry

1. Which of the following metals is oxidized by calcium ions? *potassium zinc iron lead 2. The first electrochemical cell was invented by ____. Michael Faraday *Alessandro Volta James Maxwell Benjamin Franklin 3. Why can't a lead storage battery be

*asked on March 28, 2013* -
## Lang ARts

hat fact best explains why it is significant that Angelou's narrative is set in 1940? In 1940, the United States was not yet involved in World War II. In 1940, segregation of blacks and whites was still the norm. In 1940, most high school students did not

*asked on August 15, 2013* -
## spanish

I need hep unscrambling these words can anyone help? 1)GJAUDRO 2)ARBCUE 3)EUPQIO 4)MCLICISO 5)PEASRA 6)NEIST

*asked on January 31, 2014* -
## social studies

What are some advantages and disadvantages of a reorganized family

*asked on February 11, 2015* -
## Social Studies

How did Americans disagree over the role of federal and state governments before and during the Civil War? The North wanted the federal government to govern the entire country. The South wanted the states to have much more power. Anything else I could add

*asked on April 19, 2017* -
## Math

Write an algebraic expression for the sum of 3 Coins and c Coins

*asked on October 25, 2017* -
## Career

Which of the following are the top two job expectations of people who career plan Hours** Benefits Type of work** coworkers security Which of the following is an example of a job that would supply a good that would meet a need? limo driver** actor farmer

*asked on September 4, 2018* -
## College Algebra

Use the position equation given below, where s represents the height of the object (in feet), v0 represents the initial velocity of the object (in feet per second), s0 represents the initial height of the object (in feet), and t represents the time (in

*asked on July 9, 2013* -
## Math

There are 12 animals in a farm.some are cows the rest are chickens.there are 28 animals legs in all.how many cows are there? how many chickens are there ?

*asked on August 26, 2016* -
## math

I need some help. My teacher gave me a worksheet "Why does a poor man drink Coffee?" written by Pizzazz. Does anyone know how to do this sheet?

*asked on April 24, 2008* -
## critical thinking test AU

1. Question : The average height of members of the high school basketball team is six feet, three inches. Jerry is on the high school basketball team, so Jerry must be taller than six feet. The argument above is flawed because it confuses: Student Answer:

*asked on March 12, 2012* -
## Chemistry

How many grams of K2SO4 would you need to prepare 1500 g of 5.0% K2SO4 (m/m) solution?

*asked on April 26, 2010* -
## Language arts

based on the text preview as well as research about the background of the novel and the author's life a reader can predict that the novel will most likely be about Deez nuts HA GOT EM

*asked on January 20, 2016* -
## physics

a student standing on the roof of a 50 meter high building kicks a stone at a horizontal speed of 4 meters per second, how much time is required for the stone to reach the level ground below?

*asked on January 16, 2011* -
## Chemistry

Consider the combustion of ethane: 2C2H6(g)+7O2(g)-->4CO2(g)+6H2O(g) If the ethane is burning at the rate of 0.7 mol/L × s, at what rates are and being produced?

*asked on May 14, 2015* -
## Math

The average weight of 3 boys is 53 pounds. Not one of these boys weighs less than 51 pounds. What is the maximum possible weight in pounds, of any one boy?

*asked on June 8, 2014* -
## History

How did Ming emperors try to erase Mongol influence on China? Select all that apply. A. They restored the civil service system. B. They embraced foreign trade. C. They became suspicious of foreign visitors. D. They rejected Confucian values. E. They moved

*asked on February 18, 2019* -
## chemistry

Please help with this problem =) The combustion of liquid chloroethylene, C2H3Cl, yields carbon dioxide, steam, and hydrogen chloride gas. I. write a balanced equation for the reaction (I sorta get this part) II. How many moles of oxygen are required to

*asked on October 9, 2008* -
## Chemistry

In a reaction chamber, 3.0mol of aluminum is mixed with 5.3mol Cl2 and reacts. The reaction is described by the following balanced chemical equation. 2Al + 3Cl2 ==> 2AlCl3 a)Identify the limiting reagent for the reaction. b)Calculate the number of moles or

*asked on April 5, 2010* -
## math algebra with pizzazz

pg 142 What happened to the computer programer

*asked on April 28, 2010* -
## chemistry

2. What is the reduction half-reaction for the following unbalanced redox equation? Cr2O72– + NH4+ Cr2O3 + N2 A.) Cr2O3 -> Cr2O7^2– *B.) Cr2O72– -> Cr2O3 C.) NH4+ -> N2 D.) N2 -> NH4+ 3. Which oxidation-reduction reactions are best balanced by the

*asked on March 22, 2013* -
## Math

A pair of fair dice is rolled. Let E denote the event that the number landing uppermost on the first die is a 3, and let F denote the event that the sum of the numbers landing uppermost is 6. Determine whether E and F are independent events

*asked on August 15, 2010* -
## physics

A student standing on the ground throws a ball straight up. The ball leaves the student's hand with a speed of 19.0m/s when the hand is 1.50m above the ground. How long is the ball in the air before it hits the ground? (The student moves her hand out of

*asked on September 26, 2014* -
## Chemistry

which has the highest lattice energy BaO or SrO

*asked on February 23, 2010* -
## physics

It's a snowy day and you're pulling a friend along a level road on a sled. You've both been taking physics, so she asks what you think the coefficient of friction between the sled and the snow is. You've been walking at a steady 1.5m/s, and the rope pulls

*asked on October 18, 2013* -
## social studies

How did Muslim Turks influence turkey's development?

*asked on November 30, 2015* -
## Chemistry

"Would you expect each of the following atoms to gain or lose electrons when forming ions? What ion [cation/anion] is most likely in each case?" Followed by a short list of elements such as Na and Sr. What I'm wondering is how I'm to know? I can't find

*asked on October 18, 2007* -
## Math

Which Ratios for a proportion? A. 4/9,12/25 B. 3/7,18/42 C. 5/11,20/45 D. 5/8,15/25 Which ratio forms a proportion with 18/30? A. 20/35 B. 50/90 C. 36/48 D. 60/100 Which proportion has cross products of 5*24 and 8*15? A. 5/8 = 15/24 B. 5/24 = 8/15 C. 8/24

*asked on November 13, 2017* -
## College Physics

A student of mass M = 82 kg takes a ride in a frictionless loop-the-loop at an amusement park. The radius of the loop-the-loop is R = 15 m. The force due to the seat on the student at the top of the loop-the-loop is FN = 696 N and is vertically down. What

*asked on March 17, 2016* -
## physics

A 4.0 kg object is lifted 1.5 m. (a) how much work is done against the earth's gravity ? (b) repeat if the object is lowered insteadof lifted

*asked on March 19, 2012* -
## Physics

Once a 15 kg crate is in motion on a horizontal ﬂoor, a horizontal force of 51 N keeps the crate moving with a constant velocity. The acceleration of gravity is 9.81 m/s What is µk, the coeﬃcient of kinetic friction, between the crate and the ﬂoor?

*asked on October 25, 2011* -
## Chemistry

The thiosulfate ion (S2O32-) is oxidized by iodine as follows: 2S2O32-(aq) + I2(aq) → S4O62-(aq) + 2I-(aq) In a certain experiment, 4.41×10-3 mol/L of S2O32- is consumed in the first 11.0 seconds of the reaction. Calculate the rate of production of

*asked on May 14, 2015* -
## Algebra

In a sports poll, 53% of those surveyed believe their high school football team will win the state championship. The poll shows a margin of error of +-5 percentage points. Write and solve an absolute value inequality to find the least and the greatest

*asked on September 25, 2014* -
## algebra

nestor has nickels, dimes, and quarters amounting to $1.85. if he has twice as many dimes as quarters, and the number of nickels is two less than twice the number of dimes, how many quarters does he have?

*asked on June 16, 2017* -
## Math

The cost in dollars of a class party is 59+13n, where n is the number of people attending. What is the cost for 44 people.

*asked on November 6, 2017* -
## English

in the third stanza of the poem which lines rhyme A 9 10 B 10 11 C 10 12 D 9 12

*asked on March 6, 2019* -
## science

which of the following is true about the magnetic field diagram below

*asked on October 27, 2014* -
## Math

A manufacturer uses a mold to make a part in the shape of a triangular prism. The dimensions of the part are shown below. 10.77mm 6.5mm 1.6mm 12.6mm 6.5mm Which ESTIMATE is closest to the volume in cubic millimeters of the part? 108 217 400 *** 880 Thank

*asked on March 7, 2019* -
## CHEMISTRY

A 1.575 g sample of ethanedioic acid crystals, H2C2O4. xH20 was dissolved in water and made up to 250cm^3 . One mole of the acid reacts with two moles of NaOH. In a titration, 25.0 cm^3 of this solution of acid reacted with exactly 15.6 cm^3 of 0.160 mol/

*asked on July 9, 2016* -
## Chemistry

Write and balance equations for the following reactions. A)Iron metal and Chlorine gas react to form solid iron(III) chloride. B)Solid aluminum carbonate decomposes to form solid aluminum oxide and carbon dioxide gas. C)Solid magnesium reacts with aqueous

*asked on February 28, 2010* -
## chem

How many moles of S are needed to combine with 0.208 mol Al to give Al2S3? break it down thanks

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

which has greater volume? a) 1.0 kg of feathers or 1.0 kg of lead b) 100 g of gold or 100 g of water c) 1.0 L of copper or 1.0 L or mercury

*asked on August 23, 2010* -
## Math

Convert the map scale to unit rate. How many inches represent one mile? Show Your work. Interpret the meaning of unit rate. 3/10 in. = 7/8 miles

*asked on November 9, 2017* -
## business math

Stereo Inc. sells a stereo system for $300 down and monthly payments of $80 for the next 3 years. If the interest rate is 3.25 % per month, what is the cost of the stereo?

*asked on February 9, 2011* -
## Algebra 1

A drama club wants to raise at least $500 in ticket sales for its annual show. The members of the club sold 50 tickets at a special rate of $5. The usual ticket price the day of the show is $7.50. At least how many tickets do they need to sell the day of

*asked on October 11, 2015* -
## Physics. PLEASE HELP!

two blocks of masses m1 and m2 (m1>m2) are placed on a frictionless table in contact with each other. A horizontal force of magnitude F is applied to the block of mass m1. if P is the magnitude of the contact force between the blocks, what are the net

*asked on October 11, 2012* -
## Math

How many tenths are there in 4/5?

*asked on September 21, 2014* -
## math

In his algebra class, Rob has scores of 79, 85, 81, and 65 on his first four tests. To get a grade of C, the average of the first five tests must be greater than or equal to 70 and less than 80. Solve an inequality to find the range of scores that Rob can

*asked on May 18, 2011* -
## chemistry

Calculate the concentrations of all species in a 0.690 M Na2SO3 (sodium sulfite) solution. The ionization constants for sulfurous acid are Ka1 = 1.4× 10–2 and Ka2 = 6.3× 10–8.

*asked on March 15, 2013* -
## Algebra 1

A teacher knows that 80% of her students will score no more than 5 points above or below the class average, 85%, on the test. Which inequality represents the test scores of 80% of her students? a. 75

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

Write the 12 mole ratios that can be derived from the equations for the combustion of isopropyl alcohol. 2 C3H7OH(l) + 9 O2(g) ==> 6 CO2(g) + 8 H2O (g)

*asked on March 22, 2010* -
## MATH PLEASE HELP

1) -5g-6 for g = -2 2) Write an algebraic expression for the sum of 3 Coins and c Coins 3) What Value of x is a solution to the equation? x-2 = 16 4) use mental math to solve the equation. z/-12 = -5 5) estimate the solution of the equation x-8.1 = 5.3 to

*asked on October 25, 2017* -
## math

write 480 in a) 1 significant figure b) 2 significant figures c) 3 significant figures d) 4 significant figures

*asked on August 23, 2010* -
## Chemistry

DDT, an insecticide harmful to fish, birds, and humans, is produced by the following reaction: 2 C 6 H 5 Cl (Chlorobenzene) + C 2 H O Cl 3(chloral) ==> C 14 H 9 Cl 5 (DDT) + H 2 O In a government lab, 1142 g of chlorobenzene is reacted with 485g of

*asked on September 19, 2010* -
## Chemistry

Solid aluminum carbonate decomposes to form solid aluminum oxide and carbon dioxide gas. Is Al2(CO3)3 ==> Al2O3 + CO2 the right equation? If so, how do you balance this equation?

*asked on March 1, 2010* -
## Math

Write the ratio as a unit rate. 8 meters in 10 seconds. A. 0.8 meter per second B. 1.125 meters per second** C. 2 meters per second D. 80 meters per second

*asked on November 9, 2017* -
## Chemistry

If the amount of mercury in a polluted lake is 0.4 µg Hg/mL, what is the total mass in kilograms of mercury in the lake? (The lake has a surface area of 100mi^2 and an average depth of 20 ft.) I'll probably be able to solve this once I know what it's

*asked on October 12, 2007* -
## language arts

according to harriet tubman, what was thomas garrett's role in the underground railroad

*asked on November 6, 2014* -
## algebra

the sum of ages of maria and anna is 35. when maria was two-thirds her present age and anna was three fourths of her present ages, the sum of their ages was 25. how old is maria now?

*asked on June 16, 2017* -
## Algebra 1

A student reads an average of 34 pages per day. The number of pages she reads per day varies from the average by up to 8 pages. a. Write an absolute value inequality that represents the range of the number of pages she reads per day. b. Solve your

*asked on September 25, 2014* -
## chemistry

A flask has a mass of 78.23 g when empty and 593.63 g when filled with water. When the same flask is filled with concentrated sulfuric acid, H2SO4, its mass is 1026.57 g. What is the density of concentrated sulfuric acid? (Assume water has a density of

*asked on September 6, 2010* -
## Chemistry

H2O (l) requires the largest amount of energy to raise the temperature of 25.0g H2O of the substance from 15.0 *C to 37.0 *C. Calculate the energy. Hg (l) has the largest temperature change when 550 g of the substance absorbs 10.7kJ of energy. Calculate

*asked on October 3, 2010* -
## math

what is the volume of a triangle prism with a base area of 24ft*2 and a height of 18ft

*asked on March 30, 2012* -
## Chemistry

1. Hess's law _____. A.) makes it possible to calculate H for complicated chemical reactions B.) states that when you reverse a chemical equation, the sign of H does not change C.) determines the way a calorimeter works D.) describes the vaporization of

*asked on March 4, 2013* -
## math

A park has the shape of a trapezoid. Two of the sides are 25 meters long. The other two sides are 40 meters and 20 meters long. What is the perimeter of the park my answer is 110 meters

*asked on March 4, 2012* -
## math

A piano manufacturer has a daily fixed cost of $1200 and a marginal cost of $1500 per piano. Find the cost C(x) of manufacturing x pianos in onde day. Use your function to answer the following questions: a)On a given day, what is the cost of manufacturing

*asked on September 15, 2012* -
## Math Algebra

hi guys need help with a few questions. 1. Which equation represents the axis of symmetry of the function y = 2x^2+4x-6? A. y= 1 B. x= 1 C. x=3 D x= -3 2. & 3. What are the coordinates of the vertex of the graph of the function - 2. y = -x^2+6x-11 A.

*asked on March 16, 2017* -
## spanish

Yo ______ lavo ______ manos y ______ cara. ______ cepillo ______ dientes y ______ cepillo ______ pelo. Yo ______ pongo ______ ropa.

*asked on March 25, 2012* -
## Maths

Prove that tan4x=4tanx(1-tan²x)/1-6tan²x+tan⁴x.

*asked on August 17, 2018* -
## Trigonometry

A hinged crane which measures 19m makes an angle of 50° with the ground. A malfunction causes the lock on the hinge to fail and the top part (of 14.6m) of the crane swings down. How far from the base of the crane does the top hot the ground.

*asked on May 19, 2016* -
## Global studies

The indigenous people of British Columbia are famous for carving __________, or tall poles containing the symbols of a particular group, family, or clan. a. monuments b. family pillars c. totem poles *** d. animal columns

*asked on March 12, 2014* -
## social studies

which four state capitals are located between 60 west and 70 west longitude

*asked on September 29, 2016* -
## physics

in a game a toy car slides down a slop if the top of the slope is 2 m higher than the foot of the slope how fast will the car be moving when it reaches the foot assume that all of its g.p.e is transformed to k.e (i'm 8th grade so simple answers pleas)

*asked on January 18, 2014* -
## chem

Calculate the equilibrium concentration of NH3,Cu^2+,[ Cu(NH3)]^2+ ,[Cu(NH3)2]^2+,[Cu(NH3)3]^2+,and[Cu(NH3)4]^2+ in a solution made by mixing 500.0 ml of 3.00 M NH3 with 500.0 ml of 2.00*10^-3 M Cu(NO3)2. The sequential equilibria are Cu^2+

*asked on November 17, 2015* -
## chemistry

Draw a lewis structure for BrO4- in which all atoms have the lowest formal changes. Indicate the values of nonzero formal charges and include lonepair electrons.

*asked on January 19, 2009* -
## Physics

A block slides down a frictionless plane having an inclination of θ = 13.2°. The block starts from rest at the top, and the length of the incline is 1.70 m. -> Find the acceleration of the block. (m/s2 down the incline) -> Find its speed when it reaches

*asked on October 2, 2016* -
## trigonometry

the angle of elevation of the top of the tower from the foot of a flagpole is twice the angle of elevation of the top of the flagpole from the foot of the tower. at the point midway between the tower and the flagpole, the angles of elevation to their tops

*asked on June 17, 2017* -
## chemistry

What is the freezing point of each solution? a)1.40mol Na2SO4 in 1750 g H2O Are these the right steps? 1.40mol Na2SO4 / 1.75kg = .8m 3 * 1.86 degrees C * .8m = 4.46 degrees C 4.46 degrees C - 1.86 degrees C = 2.6 degrees C

*asked on April 29, 2010* -
## math

You have to answer 2 essay questions for an exam. There are 8 essays to choose from. How many different groups of 2 essays could you possibly choose?

*asked on July 18, 2018* -
## Math(Physics)

How much energy is stored by the electric field between two square plates, 7.9 cm on a side, separated by a 2.5-mm air gap? The charges on the plates are equal and opposite and of magnitude 15 nC . Answer--> PE=_____ J PE = potential energy? I got this

*asked on April 25, 2017* -
## Chemistry

It is calculated that 0.0191 moles of CO2 are expected from a reaction at 25 degrees C and 1 atm. What volume of CO2 does this represent in cm3? (R = 0.0821 L atm / K / mol)

*asked on November 26, 2012* -
## Math

Suppose two dice(one red, one green) are rolled. Consider the following events, A: the red die shows 1; B: the numbers add to 3; C: at least one of the numbers is 4; and D: the numbers do not add to 11. Express the given event in symbolic form.

*asked on February 3, 2019* -
## trigonometry

a 60 meter high building is erected vertically on a hillside. An electric post stands vertically on the hill. An observer at the top the building, find the angle of depressions of the top and the bottom of the electric post to be 30 degrees and 42 degrees

*asked on June 5, 2017* -
## Chemistry

Determine the freezing points of each 0.20m aqueous solution. a)K2SO4 b)CsNO3 c)Al(NO3)3

*asked on April 29, 2010* -
## World History

what was Joseph Stalin favorite music, and movies?

*asked on April 13, 2016* -
## Chemistry

Which of the following substances dissolve to a significant extent in water? Explain your answer in terms of polarity. a) CH4 b) KCL c)He d)MgSO4 e)sucrose f)NaHCO3

*asked on April 13, 2010* -
## Science

Which of the following body systems does the immune system rely on to provide the first line of defense against pathogens. A. Integumentary system B. Nervous system C. circulatory system D. endocrine system I think it is C

*asked on November 16, 2017* -
## math

Two sides of a rectangular fence are 5 5/8 feet long The other two sides are 6 1/4 feet long. what is the perimeter

*asked on November 23, 2014* -
## Chemistry

The molecules water (H2O) and methane (CH4) have similar masses, but methane changes from a gas to liquid at -161 degrees C. Water becomes a gas at 100 degrees C. what could account for the difference?

*asked on April 11, 2010* -
## Physics

An electric field exerts a force of 3.00 E-4 N on a positive test charge of 7.20 E-4 C. The magnitude of the field at the location of the charge is?

*asked on March 7, 2010* -
## Math! Please Check My Answers

Key: ☺ = My Answer! 2. Write a word phrase for the algebraic expression. 3x - 7 A. The difference of three times a number x and seven. B. The difference of seven and three times a number x. C. Three times a number x fewer than seven. ☺ D. The quotient

*asked on August 14, 2013* -
## Spanish

5. Fill in the blank with the correct form of the verb jugar. yo __________ My Answer: yo juego 6. Fill in the blank with the correct form of the verb jugar. nosotros __________ My Answer: nosotros jugamos 7. Fill in the blank with the correct form of the

*asked on March 28, 2013* -
## Physics

The Earth's rate of rotation is constantly decreasing, causing the day to increase in duration. In the year 2006 the Earth took about .840 s longer to complete 365 revolutions than it did in the year 1906. What was the average acceleration of the Earth

*asked on October 23, 2011* -
## Physics

1. A concave spherical mirror has a radius of curvature of 29.4 cm. The object distance is 5.7 cm . Find the magnitude of the image distance. Answer in units of cm. 2. Find the magnification.

*asked on April 27, 2018* -
## Chemistry

Hess's law _____. A.) makes it possible to calculate H for complicated chemical reactions B.) states that when you reverse a chemical equation, the sign of H does not change C.) determines the way a calorimeter works D.) describes the vaporization of

*asked on March 4, 2013* -
## chemistry

The solubility of lead (II) chloride (PbCl2) is 1.6 x 10^-2 M. What is the Ksp of PbCl2?

*asked on November 22, 2010* -
## Math

Which ratio forms a proportion with 18/30? A. 20/35 B. 50/90 C. 36/48 D. 60/100

*asked on November 13, 2017* -
## Math

154lb person burns 420 calories per hour riding an exercise bicycle at a rate of 15 mi/hr. Write a function rule to represent the total calories burned over time by that person. Explain how the information in the problem relates to the function.

*asked on May 20, 2016* -
## U.S HISTORY

LIST TWO REASONS THE FRENCH FELT THREATENED BY BRITISH INTEREST IN THE OHIO RIVER VALLEY?

*asked on September 28, 2011*