# nathan

Most popular questions and responses by nathan-
## science

1.where is most freshwater found on earth? A.lakes and rivers B.oceans and seas C.Underground D.icecaps and glaciers

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

The top and bottom margins of a poster are 2 cm and the side margins are each 4 cm. If the area of printed material on the poster is fixed at 386 square centimeters, find the dimensions of the poster with the smallest area.

*asked on November 18, 2013* -
## physics

A 20g plastic ball is moving to the left at 30 m/s. How much work must be done th cause the ball to move to the right at 30 m/s?

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

A 4.0 kg, 36-cm-diameter metal disk, initially at rest, can rotate on an axle along its axis. A steady 5.5 N tangential force is applied to the edge of the disk. What is the disk's angular velocity, in rpm, 4.0 s later?

*asked on November 30, 2016* -
## Physics

You throw a 5.5 g coin straight down at 4.0 m/s from a 25-m-high bridge. A) How much work does gravity do as the coin falls to the water below? B)What is the speed of the coin just as it hits the water?

*asked on October 30, 2016* -
## Maths

Dylan invested some money into his bank. He agreed on a simple interest rate of 3% per annum for a period of 2 years. At the end of the 2-year period, the value of his investment increased by£72 Work out the value of Dylan's initial investment.

*asked on February 2, 2017* -
## physics

In an action movie, the villain is rescued from the ocean by grabbing onto a ladder hanging from a helicopter. He is so intent on gripping the ladder that he lets go of his briefcase full of counterfeit money when he is 126.4 m above the water. If the

*asked on September 7, 2012* -
## Physical Science

Two balloons are filled with an equal volume of air. One is put in the refrigerator for one hour, while the other is heated in a slightly warm oven. Identify which balloon is which, and explain why.

*asked on September 27, 2009* -
## chemistry

What are the reduction potentials of lithium, sodium and potassium?

*asked on November 17, 2009* -
## History

How did Napoleon’s conquests in Europe impact other parts of the world? A. Napoleon's conquest of Spain led to independence movements in the Americas. B. Napoleon’s consolidation of Europe led to the establishment of the League of Nations. C.

*asked on February 9, 2018* -
## Geometry

The endpoints of AB are A(2, 3) and B(8, 1). The perpendicular bisector of AB is CD , and point C lies on AB. The length of CD is √10 units. The coordinates of point C are_____ . The slope of CD is _____ . The possible coordinates of point D are_____

*asked on February 26, 2016* -
## Calculus

Find all numbers c that satisfy the conclusion of Rolle's Theorem for the following function. If there are multiple values, separate them with commas; enter N if there are no such values. f(x)= x^2-10x+3, [0,10]

*asked on October 28, 2013* -
## algebra and a little bit of geometry

What is the area of the composite figure whose vertices have the following coordinates? (−8, 3) , (−4, 4) , (−1, 1) , (−4, −2) , (−8, −2)

*asked on February 28, 2018* -
## Physics

A 225-kg crate is pushed horizontally with a force of 710 N. If the coefficient of friction is 0.20, calculate the acceleration of the crate.

*asked on April 14, 2010* -
## Calculus

A street light is at the top of a 17 ft tall pole. A woman 6 ft tall walks away from the pole with a speed of 6 ft/sec. How fast is the tip of her shadow moving when she is 50 ft from the base of the pole.

*asked on October 8, 2013* -
## Social Studies

1. Which is a key factor that affects the climate of mountainous Latin America? (2 points) • snow • El Niño • elevation • sea breezes 2. Which statement best describes the economies of Central America? (2 points) • Central America's economy is

*asked on April 22, 2015* -
## statistics

Assume the body temperatures of healthy adults are normally distributed with a mean of 98.20 °F and a standard deviation of 0.62 °F (based on data from the University of Maryland researchers). a. (0.1 point) If you have a body temperature of 99.00 °F,

*asked on May 10, 2010* -
## Pre Calculus

Prove that 2/square root 3cosx-sinx=sec(pi/6-x)

*asked on April 22, 2010* -
## Chemistry

The molar heat of vaporization of water is 42 kJ/mol. How much energy is released by the condensation of 3.0 g of water?

*asked on January 3, 2019* -
## Chemistry

How many moles of bromine are there in a 0.35 mL dichloromethane solution of 10% bromine? Density of Bromine = 3.10g/mL Density of dichloromethane = 1.33g/mL

*asked on January 24, 2013* -
## physics

A u-shaped tube, open to the air on both ends,contains mercury. Wather is poured into the left arm until the water column is 10.0 cm deep. How far upward from its initial position does the mercury in the right arm rise?

*asked on November 24, 2010* -
## math 4th grade

Not sure what to do here? Naomi has 50 red beads and white beads. The number of red beads is 1 more than 6 times the number of white beads. How many red beads does Naomi have?

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

. A small statue in the shape of a falcon has a weight of 24.1 N. The owner of the statue claims it is made of solid gold.When the statue is completely submerged in a container brimful of water, the weight of the water that spills over the top and into a

*asked on December 13, 2009* -
## Math (Propogation)

Consider an antenna transmitting a power of 5W at 900MHz. Calculate the received power at a distance of 2km if propagation is taking place in free space.

*asked on February 9, 2011* -
## chemistry

What is the total number of nonbonding valence electrons in the "dipolar ion" form of glycine, +NH3CH2COO-?

*asked on October 4, 2008* -
## Chemisty

Why does the bottom of the inner blue cone of a bunsen burner have such a low temperature compared to the rest of the flames? Is this due to the outside flames being in contact with oxygen, while the inner flame receives a low amount of oxygen?

*asked on September 4, 2019* -
## Algrebra

with a tailwind, a bird flew at a ground speed of 3 mi/h. Flying the same path against the same wind, the bird travels at a ground speed of 1.5 mi/h. What is the bird's air speed? What is the wind speed?

*asked on January 21, 2014* -
## science

an advantage of using an electromagnet shown on the crane the image below instead of a regular magnet to move cars in a junk yard is that an electromagnet can easily be turned on and of

*asked on April 10, 2019* -
## health

primary function of the smaller intestines

*asked on March 14, 2019* -
## science practice

the strength of the force of gravity depends on: wut

*asked on April 11, 2019* -
## Chemistry

50.0 mL of 0.116 M NaOH is titrated with 0.0750 M HCl. Calculate the pH after the addition of 5.0 mL volume of acid.

*asked on May 1, 2013* -
## Math

What are two mixed numbers so that the sum is 7 2/4 and the difference is 5

*asked on December 22, 2016* -
## science

A mixture of hydrogen gas and oxygen gas are ignited and the following reaction occurs: Hydrogen + Oxygen = Water + Energy. Is this an Endothermic or Exothermic reaction and why?

*asked on August 28, 2008* -
## physical science

A mixture of hydrogen gas and oxygen gas are ignited and the following reaction occurs: Hydrogen + Oxygen = Water + Energy. Is this an Endothermic or Exothermic reaction and why?

*asked on August 27, 2008* -
## English

Hello, I just wanted to have some extra eyes look over my essay for the vice-presidential nomination for USMA. The character limit is 3500. I welcome both constructive criticism and grammatical fixes/suggestions. Thank you! WHY DO YOU WANT TO ATTEND ONE OF

*asked on July 11, 2019* -
## sports

what is the impact on media in sport? the impact of social issues in sport (gender) impact of drugs in sport

*asked on January 13, 2009* -
## chemistry

What is the shape of H3C+ ?

*asked on October 4, 2008* -
## Math

Exam scores were normal in MIS 200. Jason's exam score was 1.41 standard deviations above the mean. what percentile is he in?

*asked on March 25, 2009* -
## social studies

Why can families like Yasmin easily move from place to place in Europe

*asked on April 10, 2019* -
## Calculus

A baseball diamond is a square with sides of length 90 ft. A batter hits the ball and runs toward first base with a speed of 21 ft/s. At what rate is his distance from second base changing when he is halfway to first base? At what rate is his distance from

*asked on October 8, 2013* -
## Physics

A toy car runs off the edge of a table that is 1.385 m high. The car lands 0.378 m from the base of the table. How long does it take for the car to fall? Answer in units of s. What is the horizontal velocity of the car? Answer in units of m/s.

*asked on October 7, 2019* -
## Physical Science

How is the air similar to a sponge?

*asked on September 27, 2009* -
## physics

How fast do you need to swing a 180-g ball at the end of a string in a horizontal circle of 0.6-m radius so that the string makes a 33∘ angle relative to the horizontal?

*asked on February 9, 2015* -
## math

Chelsie saves 1/5 of her allowance and spends 2/3 of her allowance at the mall. What fraction of her allowance remains?

*asked on October 22, 2012* -
## physics

How high above the earth’s surface would you have to be before your weight would be only 0.6 its current value?

*asked on March 18, 2011* -
## physics

Calculate the speed of a proton having a kinetic energy of 1.00 × 10^−19 J and a mass of 1.673 × 10^−27kg. Answer in units of m/s

*asked on February 21, 2013* -
## Chemistry

Iron metal is produced from the ore iron(III) oxide by reacting the ore with gaseous carbon monoxide at high tempature to produce liquid iron metal and gaseous carbon dioxide. How do you balanced this equation for this reaction?

*asked on November 19, 2011* -
## Math

How do you isolate the variable in 3x=9?

*asked on February 7, 2018* -
## Math

Explain how you could write 35% as the sum of two benchmark prevents or as a multiple of a percent.

*asked on March 17, 2015* -
## calculus

Two people start from the same point. One walks east at 3 mi/h and the other walks northeast at 2 mi/h. How fast is the distance between the people changing after 15 minutes?

*asked on December 5, 2011* -
## Math

Find two numbers a and b whose sum a+b is -1 and whose difference a−b is 5. I do not understand the question

*asked on February 22, 2017* -
## Chemistry

You weigh out 1.20 g of sodium carbonate monohydrate, dissolve it in water and react it with 15.00 mL of 2.00 M HCl. Write an equation for the reaction and calculate the expected mass of carbon dioxide that will be produced.

*asked on February 14, 2013* -
## Physics

A "swing" ride at a carnival consists of chairs that are swung in a circle by 12.0 m cables attached to a vertical rotating pole, as the drawing shows. (θ = 56.0°) Suppose the total mass of a chair and its occupant is 190 kg. (a) Determine the tension in

*asked on March 4, 2011* -
## math

If you walk 5/ 8 mile and then jog 4/ 7 mile, what is the total distance covered? How much farther did you walk than jog? The total distance covered is nothing miles. (Simplify your answer. Type an integer, simplified fraction, or

*asked on September 7, 2018* -
## Math

2% of the stray dogs in southfield are unlicensed. on a randomly-chosen day, the southfield city animal control officer picks up 7 stray dogs. what is the probability that at least on will be unlicensed?

*asked on March 25, 2009* -
## sports

1. what is the impact of social issues in sport e.g gender 2. what is the impact of the media in sport thanks for your help

*asked on January 16, 2009* -
## mathematics

solve the equation, (-5x - 25 = 14 - 8x)

*asked on December 4, 2018* -
## Calculus

Consider the function f(x)=-2x^3+33x^2-108x+2. For this function, there are three important intervals: (-Inf,A], [A,B], [B,Inf) where A and B are the critical points. Find A and B and for each of the important intervals, tell whether f(x) is increasing or

*asked on October 29, 2013* -
## Math homework

There are caps in a box. 1/6 are red, 1/3 are blue, and 3/7 of the remainder are green. There are 27 green caps, how many caps are there in total.

*asked on November 12, 2015* -
## Math homework

Kieth spends 1/6 of his savings on a magazine and 2/5 of the remainder on a storybook. What fraction of his savings is left?

*asked on November 12, 2015* -
## socials studies

this is basically an exam essay that we can take home to do and i need serious help in order to pass this course. was the british government laissez-faire policy during the industrail revolution necassary? discuss the advantages and disadvantages of this

*asked on June 13, 2007* -
## math

massimo has $90 in the bank. Every time he rides the buss he spends $2.50. write and solve an equation that massimo can use to see how many times he can ride the bus.

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

This has been bugging me, I am given the steps to the answer, yet when I try to redo it I cannot reach the same answer. It is probably some silly mistake that I don't seem to notice, can someone please point my error, Thank you! Context : Physics The

*asked on December 11, 2018* -
## physics

A baseball is pitched at 40 m/s. The batter hits the ball directly back at the pitcher at 50 m/s. What is the magnitude of the acceleration of the ball if it was in contact with the bat for 1/30s. Answer says 2700m/s^2

*asked on January 25, 2011* -
## Physics

In the figure below, a spider is resting after starting to spin its web. The gravitational force on the spider is 0.167 N on the junction of the three strands of silk. The junction is supported by different tension forces in the two strands above it so

*asked on September 5, 2012* -
## Physiscs 222

The inner and outer surfaces of a cell membrane carry a negative and positive charge respectively. Because of these charges, a potential difference of about 70*10-3 V exists across the membrane. The thickness of the membrane is 8.0*10-9 m. Assumption the

*asked on June 15, 2015* -
## Math

For the first 15 questions on a test, 14 questions were answered correctly but only 60% of the remaining questions was correctly answered. 4/5 of the whole test was correct. If each question was awarded of equal value, how many questions was there

*asked on May 15, 2019* -
## chemistry

Select all true statements from the following: a. ) Metals are good conductors of heat and electricity. b. ) Nonmetals generally react by forming covalent bonds (i.e. sharing electrons) or by gaining electrons to form anions. c. ) Halogen atoms have the

*asked on October 4, 2008* -
## math

869872579875 carz mineus 32 % idk the answer pleas help me

*asked on March 14, 2019* -
## Math (fractions)

How many twelfths are equal to 1/2?

*asked on December 19, 2017* -
## Calculus

Find the slope of the tangent line to the curve (a lemniscate) 2(x^2+y^2)^2 = 25(x^2-y^2) at point (-3,-1).

*asked on October 8, 2013* -
## Statistics

The weights of adult males are normally distributed with a mean of 172 lb and a standard deviation of 29 lb Q.Find the weight that divides the upper 2% of weights from the lower 98%

*asked on March 10, 2011* -
## Math

For the first 15 questions on a test, 14 questions were answered correctly but only 60% of the remaining questions was correctly answered, 4/5 of the whole test was correct. If each question was awarded of equal value, how many questions was there

*asked on May 10, 2019* -
## math solve the problem using the four step plan

At the end of their 3-day vacation, the Palmers traveled a total of 530 miles. On the third day,they drove 75 miles. On the second day,they drove 330 miles. How many miles did they drive the first day? I can only solve this by adding the second, and third

*asked on September 20, 2016* -
## statistics

In a particular hospital, newborn babies were delivered yesterday. Here are their weights (in ounces): 106 104 96 123 116 Assuming that these weights constitute an entire population, find the standard deviation of the population. Round your answer to at

*asked on April 19, 2010* -
## Math

Chocolate Box Company is going to make open-topped boxes out of 3 × 11-inch rectangles of cardboard by cutting squares out of the corners and folding up the sides. What is the largest volume box it can make this way? (Round your answer to one decimal

*asked on October 19, 2015* -
## physics

A plane cruising at 251 m/s accelerates at25 m/s2 for 9 s.What is its final velocity?Answer in units of m/s

*asked on December 17, 2012* -
## Math

A retail store estimates that weekly sales s and weekly advertising costs x (both in dollars) are related by s=50000−430000e^(−00009x) The current weekly advertising costs are 2000 dollars and these costs are increasing at the rate of 300 dollars per

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

The time required for a citizen to complete the 2000 U.S. Census "Long" form is normally distributed with a mean of 40 minutes and a standard deviation of 10 minutes. what proportion of the citizens will require less than 1 hour?

*asked on March 25, 2009* -
## economics

Unemployment rate is unacceptably high. Is this positive economics, normative economics, or art of economics and why

*asked on April 28, 2008* -
## Math

The batteries from a certain manufacturer have a mean lifetime of 890 hours, with a standard deviation of 90 hours. Assuming that the lifetimes are normally distributed, complete the following statements.

*asked on June 8, 2014* -
## Finite Math

Assume that the student has a cup with 9 writing implements: 4 pencils, 3 ball point pens, and 2 felt-tip pens. Students will select 5 writing implements. In how many ways can the selection be made if no more than one ball point pen is selected?

*asked on September 15, 2010* -
## algebra 1

juan drives to work. Because of traffic conditions, he averages 22 miles per hour. He returns home averaging about 32 miles per hour. the toatle time traveled is 2 and 1/4 hours.define a variable for the time Juan takes to drive to travel to work write an

*asked on March 26, 2008* -
## history

what factors influenced the renaissance

*asked on August 17, 2013* -
## Chemistry

I am stumped on this one...Please help!!! Write a balanced base ionization reaction for methylamine (CH3NH2) in water. Identify all species as acids and bases and identify the conjuate acid-base pairs.

*asked on November 19, 2011* -
## Physics

A truck travels up a hill. With a 6.5 incline the truck has a constant speed of 17 m/s what is the horizontal component of the trucks velocity

*asked on October 4, 2018* -
## Calculus

The top of a 24 foot ladder, leaning against a vertical wall, is slipping down the wall at the rate of 4 feet per second. How fast is the bottom of the ladder sliding along the ground when the bottom of the ladder is 7 feet away from the base of the wall?

*asked on October 8, 2013* -
## math

a gym membership charges a 100 dollars as an initial fee plus 25 dollars every month. another gym only charges 45 dollars every month. after how many months will the total cost for both gyms be the same

*asked on January 12, 2016* -
## Mathematics

The nearest star to our solar system, is 4.3 light-years away Express this distance in miles in scientific notation

*asked on June 29, 2013* -
## science

if a car travels at 93 km\h, what rate is it traveling in km\min? we haven't used km yet and i am pretty confused

*asked on September 15, 2015* -
## mathematics

Express this ratio in its simplest form $6:72

*asked on June 30, 2013* -
## home economics

Unemployment rate is unacceptably high. Is this positive economics, normative economics, or art of economics and why

*asked on April 26, 2008* -
## biology

If a particular experiment were known to have a transformation efficiency of 3 x 10^3 bacteria/µg of DNA, how many transformant colonies would be expected to grow on the LB/amp/ara plate? You can assume that the concentration of DNA and fraction of cells

*asked on March 5, 2009* -
## math

cycling time distance for Joe mario melanie 0 0 0 0 1 5 7 9 2 10 14 18 3 15 21 27 Find the distance each person travels during the first 3 hours. Explain. And find the distance each person travels in 7 hours. THANK YOU

*asked on August 28, 2007* -
## Math

Each letter in the subtraction problem below represents a different digit from 0 through 9. The digits 3 and 5 do not appear in the problem. Replace each letter so that the answer to the subtraction problem is correct. GRAPE - PLUM ________ APPLE Why would

*asked on March 29, 2007* -
## chemistry

Select all true statements from the following: a. ) Metals are good conductors of heat and electricity. b. ) Nonmetals generally react by forming covalent bonds (i.e. sharing electrons) or by gaining electrons to form anions. c. ) Halogen atoms have the

*asked on October 3, 2008* -
## science

Describe magnetic fields in your own words pleas help me i need it to pass 6 th grade

*asked on March 20, 2019* -
## Chemistry

At a temperature of 23.0 degrees celcius, and a pressure of 2.25 bar what volume would 23.0 g of a compound in the gaseous state with a molecular mass of 207 g/mol occupy?

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

Gravel is being dumped from a conveyor belt at a rate of 10 cubic feet per minute. It forms a pile in the shape of a right circular cone whose base diameter and height are always equal. How fast is the height of the pile increasing when the pile is 18 feet

*asked on October 9, 2013* -
## 9th grade

the circumference of circle j is 24 pie. what is the perimeter of jkl

*asked on November 18, 2010*