# josh

Newest questions and responses by josh-
## IB Physics

a wind turbine has a power output p when the wind speed is v. The efficiency of the turbine does not change. What is the wind speed at which the power output is p/2 I know the answer is v/cube root of 2 but I don't know how to get that answer. Can you show

*asked on January 22, 2019* -
## Physic

A 0.610 kg wooden block is spun around on a wooden table. The wooden block is being spun around on a 2.00 m long massless wire. The wooden block has air being pushed out behind it causing a thrust force of 3.40 N. The air is being pushed out at 70.0° from

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

Let the integral ∫ from 4 to 13 f(x) dx = 5, ∫ from 4 to 7 f(x) dx = 1, ∫ from 10 to 13 f(x) dx = 3. a)Find ∫ from 7 to 10 f(x)dx= ? and b)Find ∫ from 10 to 7 [5 f(x)−1]dx= ?

*asked on October 19, 2018* -
## Science

How many mililiters of water would be displaced by 408 grams of lead?

*asked on October 9, 2018* -
## English

Which statement is NOT true about sentence fragments? A. They do not have a subject, but they have a predicate. B. They do not have a subject and a verb. C. They do not form a complete thought. D. Adding other words makes the fragment a complete sentence.

*asked on September 17, 2018* -
## maths

Rob is twice Joshua’s age. Nick is 5 years older than Joshua. The sum of all their ages is 45. How old is Nick?

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

Water flows at 0.830 m/s from a hot water heater, through a 450-kPa pressure regulator. The pressure in the pipe supplying an upstairs bathtub 3.70 m above the heater is 414-kPa. 1. What's the flow speed in this pipe?

*asked on June 26, 2018* -
## Math

Determine the answer to the following: 9.70 x 108 x 9.6 x 101 = ?? Select one: a. 9.3 e10 b. 9.3 e8.0 c. 0.93 e10 d. 9.3 e8.0

*asked on June 5, 2018* -
## History

What natural resources have remained significant to Washington economic activity from the time of European colonization to today? 3 choice A. airplanes B. Factories C. Farmland D. Forests E. Genetics F. Railroads G. Research facilities H. Waterways My

*asked on June 2, 2018* -
## Math

Christopher mixes the letters s, e, l, e, c, t, e, and d thoroughly. without looking, allen draws one letter. expressed as a fraction, decimal, and percentage, what is the probability that allen will not select a consonant? A. 3/8 , 0.375, 37.5% B. 3/5 ,

*asked on May 21, 2018* -
## History

Section 1 political power. all political power is inherent in the people, and governments derive their just powers from the consent of the governed, and are established to protect and maintain individual rights. ... section 33 recall of elective officers

*asked on May 21, 2018* -
## trig

Find the exact value of costheta if ,sintheta=-2/3 and theta is in standard position with its terminal side in Quadrant IV.

*asked on May 20, 2018* -
## Math

The figure below shows a shaded circular region inside a larger circle: A shaded circle is shown inside another larger circle. The radius of the smaller circle is labeled as r and the radius of the larger circle is labeled as R. On the right side of the

*asked on April 25, 2018* -
## Business Calculus

Let logb 2=2.217 and logb 3=3.417. Find logb 3b Please walk me through this steo by step.

*asked on April 1, 2018* -
## Physics (Projectile Motion)

Two trucks are parked back to back facing in opposite directions on a straight, horizontal road. The trucks quickly accelerate simultaneously to 3.0m/s in opposite directions and maintain these velocities. When the backs of the trucks are 20m apart, a boy

*asked on March 17, 2018* -
## Math

Two cones are similar Cone 1 r=5 h=15 Cone 2 r=? h=18 What is the length of the radius of cone 2? is it 7?

*asked on March 1, 2018* -
## math

Ms Desai has $18 000 to invest and is looking at GICs. • Option A: 5-year GIC at 2.45%, compounded annually. • Option B: 2-year GIC at 2.2%, compounded annually; reinvest funds in a 3-year GIC at 3.5%, compounded annually. Compare the future values of

*asked on February 6, 2018* -
## Math

Real Estate an office building purchased for $1, 200,000 is appreciating because of rising property values in the city. At the end of each year its value is 105% of its value at the end of the previous year. a. Use a recursive formula to determine what the

*asked on February 5, 2018* -
## sevier middle

Mimi works at a store where she earns a base salary of $82 per week plus a commission of 10% of sales. If Mimi sold $80 worth of merchandise last week, what was her total pay?

*asked on January 24, 2018* -
## Math 6th grade

You use a scale of 1inch = 280 feet to build a model of the Great Pyramid of Giza. The width of the base of the pyramid is 756 feet. What is the width of your model? a. 27 in. b. 3.4 in. c. 3 in. d. 2.7 in.

*asked on January 16, 2018* -
## math

if the sides are 18 24 and 30 what kind of angle is it

*asked on December 7, 2017* -
## math

Testing Laboratory Gloves The New York Times ran an article about a study in which Professor Denise Korniewicz and other Johns Hopkins researchers subjected laboratory gloves to stress. Among 240 vinyl gloves, 63% leaked viruses. Among 240 latex gloves, 7%

*asked on December 6, 2017* -
## stats

A study was made of 413 children who were hospitalized as a result of motor vehicle crashes. Among 290 children who were not using seat belts, 50 were injured severely. Among children using seat belts, 16 were injured severely (based on data from

*asked on December 6, 2017* -
## maths\

Write the ratio 2.5 to 3.15 as a fraction in simplest form

*asked on December 5, 2017* -
## maths

Ten subtracted from a number is greater than thirty-three

*asked on December 5, 2017* -
## stats

Test the claim given, identify null hypothesis, alternative hypothesis, test statistic, p-value or critical values, conclusion about the null hypothesis and final conclusion Environmental concerns often conflict with modern technology, as is the case with

*asked on December 4, 2017* -
## stats

test the claim, identify null hypothesis, alternative hypothesis, test statistic, p-value and critical values, and conclusion The health of the bear population in Yellowstone national park is monitored by periodic measurements taken from anesthetized

*asked on December 4, 2017* -
## stats

find critical z values, in each case assume normal distribution applies. left tailed test. Alpha= 0.05 Can someone please explain how to do this?

*asked on December 2, 2017* -
## math

A medical researcher wants to determine whether male pulse rates vary more or less than female pulse rates. Using the sample pulse rates in Data Set 1 in Appendix B, the male pulse rates can be summarized with the statistics 40=n,69.4=x,11.3=s. For

*asked on November 27, 2017* -
## AP Biology

If plants are grown for several days in an atmosphere containing 14CO2 in place of 12CO2, one would expect to find: very little radioactivity in the growing leaves large amounts of radioactive water released from the stomates a large increase in 14C in the

*asked on November 19, 2017* -
## Chem -Bob Pursley Please Help!

So I would like to check some of my answers. I really appreciate any help 1. Which of the following atoms or ions is diamagnetic; Cr Br Mn2+ B C4+ - I said C4+ 2. Which of the following atoms or ions is paramagnetic? C4- S^4+ V^4+ Se2- Ge4+I said V^4+

*asked on November 12, 2017* -
## Help Bob Pursley

So i am asked to write the equation representing the third ionization energy for Cr, and what I could come up with is Cr^2+(g)->Cr^3+ + e(not sure if I am right). For the second part I am told that the electron affinity of K is 48 kJ/mol, and i am supposed

*asked on November 11, 2017* -
## Chemistry

So i am asked to write the equation representing the third ionization energy for Cr, and what I could come up with is Cr^2+(g)->Cr^3+ + e(not sure if I am right). For the second part I am told that the electron affinity of K is 48 kJ/mol, and i am supposed

*asked on November 11, 2017* -
## math

After years of teaching, I can say (with 100% made up certainty) that the average number of questions the typical student can complete per minute is 5.Â If I choose any student at random (I'm looking at you), what is the probability that yo...er that

*asked on October 12, 2017* -
## math

During the winter it snows 3 out of every 10 days what is the probability that it will snow, in any given week 7 days, more than 3 times?

*asked on October 12, 2017* -
## college chemistry

28.6 grams of SO2 react in the following synthesis: SO2+O2->SO3 How many grams of SO3 could be produced

*asked on September 27, 2017* -
## Language arts

The word expectations best describes which situation from “Two Kinds”? Waverly’s reputation as a chess champion the mother’s hopes for her daughter to become a prodigy Mr. Chong’s retirement from teaching piano the daughter’s performance at the

*asked on September 14, 2017* -
## Chemistry

Is S^(2-) a conjugate base of a weak acid? I think it is not as a congugate base grabs a H^+ ion. am I right?

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

Is S^(2-) a conjugate base of a weak acid? I think it is not as a congugate base grabs a H^+ ion. am I right?

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

Order in the increasing value of their polarity? HF NH3 H2O CO2 here i used the scale and got their numbers. HF>H2O>CO2>NH3 am i correct?

*asked on August 17, 2017* -
## Chemistry

How do we order them considering their solubility? CH4 , NH3 , Cl2 , CO2 Ammonia make H bonds with water,which makes it the most soluble. CH4 only have Vander Valls forces. I've heard Cl2 disdolves in considerable amounts in water. So how do we order them?

*asked on August 17, 2017* -
## Chemistry

Does LiAlH4 perform any kind of a reaction with a triple bond?

*asked on August 17, 2017* -
## Chemistry

Does the reaction rate of a zero order reaction becomes half of its initial value,if the concentration of the reactant becomes half of its initial value?

*asked on August 17, 2017* -
## Chemistry

Why is meta-nitro phenol more basic than para-nitro phenol?

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

How do we integrate ln| 1 - cot x | 0-pi/4?

*asked on August 7, 2017* -
## Chemistry

Can't we except a white percipitate(ethanoic acid),when ethanoyl chloride is dissolved in water???

*asked on August 5, 2017* -
## Maths

a and b are perpendicular vectors.a=(2i+3j) and b=ti+dj(d>0 and i and j are unit vectors) and |b|=1 Find t and d? I know we have to use the cross product here. a.b=|a||b|*cos(π/2) (2i+3j)(ti+dj)= √13*1*0 2t+3j=√13*0 How do we find t and d?

*asked on August 1, 2017* -
## Chemistry

What makes the strongest cation in water? Al Na Fe K Mg I know that the OH^- ions from water are enough for the Al(OH)3 and Fe(OH)3 precipitates to appear and we've been taught that K,Na compounds are soluble in water too. And Mg(OH)2 needs a higher OH^-

*asked on July 26, 2017* -
## stat

Use table A - 2 to find the probability of a randomly selected value is between 0.7 and 1.98.

*asked on July 6, 2017* -
## stats need help

If all the values in a data set are converted to z-scores, the shape of the distribution of the z-scores will not be the same as the distribution of the original data. True or False?

*asked on July 6, 2017* -
## Help me with math

Find the variance for the given data. Round your answer to two decimal places. 5.0, 8.0, 4.9, 6.8, and 2.8

*asked on July 6, 2017* -
## Math need help

Identify the type of observational study. Researchers plan to collect data by interviewing patients who have cardiac by-pass surgery at several local hospitals beginning in January 2014. Cross-sectional Retrospective Prospective None of these

*asked on July 6, 2017* -
## math

i am a 3 digit number. my ones is one more than my tens. my tens digit is 0. my hundreds is 4 more than my ones. what number am i?

*asked on July 3, 2017* -
## Chemistry

An unknown monoprotic acid has a pH of 2.87. Is this acid weak or strong if 22.32 mL of 0.112 M NaOH is required to titrate 25.00 mL of the acid? If the acid is weak, calculate its Ka. Answer is Ka = 1.8 x 10^-5, but I don't know how to get there. Any help

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

A 25.00 mL sample of a soft drink was titrated using 12.10 mL of 1.50 M NaOH. Given that the soft drink's monoprotic acid has a Ka value of 2.8 x 10^-5, predict the pH of the soft drink. I know that the answer is pH 2.85 (our practice questions have an

*asked on June 25, 2017* -
## Social Studies

How can a free press hold the government accountable? a.hosting opinion panels** b.offering prior restraint c.accessing classified info d.summarizing government actions

*asked on May 31, 2017* -
## math

When baking a cake, you have a choice of the following pans: a round cake pan that is 2 inches deep and has a 7 inch diameter a 6 inch × 9 inch rectangular cake pan that is 2 inches deep a. Which of these pans has the larger volume? Justify your answer.

*asked on May 27, 2017* -
## math

A man travels 12km due north, then 5km due east and then back to the starting point on a straight road. What is the total distance traveled?

*asked on May 24, 2017* -
## Algebra

Enterprise chargesa flat fee of $500 and an additional $2.45 per mile hertz charges a flat fee of $70 and an additional $1.25 per mile driven write an equation to represent the cost, y, of driving x miles with enterprise.

*asked on May 8, 2017* -
## Calculus

I am given the true of false question: If f(x) is continuous and 0

*asked on May 4, 2017* -
## math

How much money must Andrea invest for 2 years in an account that earns an annual simple interest rate of 8% if she wants to earn $500 from the investment?

*asked on May 2, 2017* -
## MATH

The Bishop's Peak 4-H club is having its annual fundraising dinner. Adults pay $25 apiece and children pay $10 apiece. If the number of adult tickets sold is twice the number of children's tickets sold, and the total income for the dinner is $1,800, how

*asked on May 2, 2017* -
## Science

How many grams of Sodium chloride are in 53.2 g of solution that is 0.50% by mass sodium chloride?

*asked on May 2, 2017* -
## Maths

Route 1 - 52 miles at 60mph. Route 2 - 43 miles at 50mph. Which route is faster and by how much? Thanks.

*asked on April 28, 2017* -
## science

A 50-kg object moving at 12 m/s has a momentum of 600 kg ´ g m/s. What is the mass of an object, moving at 4 m/s that has the same momentum?

*asked on April 27, 2017* -
## Political Science

Is it better for legislators to answer to party leadership or to the median voter? Why or why not? Just pros and cons of both would be of immense help to begin research to answer this prompt

*asked on April 24, 2017* -
## physics

Consider a wire in the shape of a semi-circle of radius R, with a total positive net charge Q vistributed over the wire uniformly. Divide the wire into at least 8 equal point-like “chunks” of charge. Then, for each “chunk,” sketch (on the same

*asked on April 18, 2017* -
## physics

If a segment of wire has a net charge (uniformly distributed), and then its length is increased by 50%,by what factor has its charge density changed? If the original charge was 10.0 nC, how much charge must then be added to restore the wire’s original

*asked on April 18, 2017* -
## physics

Consider a wire in the shape of a semi-circle of radius R, with a total positive net charge Q distributed over the wire uniformly. Divide the wire into at least 8 equal point-like “chunks” of charge. Then, for each “chunk,” sketch (on the same

*asked on April 17, 2017* -
## physics

If a segment of wire has a net charge (uniformly distributed), and then its length is increased by 50%,by what factor has its charge density changed? If the original charge was 10.0 nC, how much charge must then be added to restore the wire’s original

*asked on April 17, 2017* -
## physics

AN OCEAN WAVE TRAVELS 18.8 METERS IN 5.1 SECONDS. THE DISTANCE BETWEEN THE 2 NEAREST WAVE CREST IS 4.1 METER. WHAT IS THE FREQUENCY?

*asked on April 14, 2017* -
## physics

Evaluate the following statement (T/F/N), explain: If you reduce by half the distance between two point charges, you double the magnitude of electrical force that each exerts on the other.

*asked on April 12, 2017* -
## Science. HELP!!

If you decrease the frequency of a wave, how does the velocity change?

*asked on April 12, 2017* -
## social studies

Which set correctly identifies the features shown on the map 1. A Andes Mountains. B Pamps 2. B Atacama Desert C Pamps 3.A Atacama Desert D Andes Mountains 4. C Andes Mountains D Pamps i think it is 1 im not sure

*asked on April 12, 2017* -
## Science! NEED HELP URGENT

What effect does amplitude have on velocity?

*asked on April 11, 2017* -
## MATH URGENT HELP!

you put 5,000 in an account that is compounded quarterly. the annual interest rate ,r, is 4%. how much will be in the account after 10 years?

*asked on March 29, 2017* -
## word problems

In certain deep parts of oceans, the pressure of sea water, in pounds per square foot, at a depth of d feet below the surface, is given by P=16+7d/11 If a scientific team uses special equipment to measures the pressure under water and finds it to be 646

*asked on March 26, 2017* -
## Math

Name the population and the sample in these two 1) The number of roadrunners born within a 50-mile radius of lubbock 2) The cars traveling at a 75 kilometers per hour between beaumont and lufkin

*asked on March 16, 2017* -
## math help ASAP

Rico made a function table to illustrate the rate he charges for mowing lawns. Complete the table. Then write a function rule for the function. (1 point) ( ) = blank Hours (h) 1 2 3 4 5 Earnings (E) ( ) ( ) ( ) $22.00 $27.50 a. $5.75, $11.50, $17.25; E =

*asked on March 9, 2017* -
## Math

In a Canadian Football League game, the path at one particular kick-off can be modelled using tge function h(d)=-0.02d^2+2.6d-66.5,where h is the height of the ball and d is the horizontal distance from the kicking team's goal line,both in yards. A value

*asked on March 6, 2017* -
## english

which set of words, below could be used to describe the disperal of seeds to a new region 1.wings, legs, migration 2.invasive, exotic, continental drift 3.biogeography, adaptation, survival, 4.wind, water, animal feces and if you know the rest can you help

*asked on February 24, 2017* -
## Physics

The lecturer with a monotone voice of 440 Hz and you are both 2m away from the long, smooth and tall wall.You will hear sound that comes directly to you from the lecturer along with sound that comes back from the wall on it’s way to reaching you.You need

*asked on February 24, 2017* -
## Math

Country A has a population of 102.4 million people and total land area of about 150.7 thousand square miles. What is the population density (the # of people per square mile?

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

a boy noticed that the end of the 3.5m shadow, the top of his head and the top of a 28m tall tree are in a straight line. if he is 1.5m tall, how far is he from the tree?

*asked on February 16, 2017* -
## Physics

1) Imagine you were to walk 12 km 25 degrees North of East. If you could only walk south and west to get back to the point that you started from, how far would you have to walk? 2) An airplane has a velocity of 70 m/s [50 degrees W of N] with respect to

*asked on February 16, 2017* -
## mrps

Before taking her final test, Tammys mean was 88% If she scores 68% on the final, her mean will be 86%. However, if she scores 98% on the final test, her mean will be 89%. How many test will Teresa takes in total.

*asked on February 7, 2017* -
## Math

The average atomic weight of all elemons in the periodic tabe is 134.355 unidied atomic mass uints.

*asked on February 1, 2017* -
## english

Except for Ronnie and ______, everyone was on time. him**** he Between you and ___, I know the answer to the mystery I**** me Leave your message with Ms. Hirioka and ______ me I**** It was Geraldine Ferraro______ ran for vice president in 1984. who*** whom

*asked on January 18, 2017* -
## Calculus

What is the largest possible product of two non-negative number whose sum is 1

*asked on January 8, 2017* -
## calculus

What is the largest possible product of two negative number whose sum is 1?

*asked on January 8, 2017* -
## calculus

is my answer to this question correct A spherical balloon is losing air at the rate of 2 cubic inches per minute. How fast is the radius of the ballon shrinking when the radius is 8 inches. Answer= .0024

*asked on January 8, 2017* -
## calculus

A spherical balloon is losing air at the rate of 2 cubic inches per minute. How fast is the radius of the ballon shrinking when the radius is 8 inches.

*asked on January 8, 2017* -
## Algerbra

Mark has made a clay model. He will now make a clay statue that is mathematically similar to the clay model. The model has a base area if 6cm^2. The statue will have a base area of 253.5cm^2. Mark used 2kg of clay to make the model. Clay is sold in 10kg

*asked on January 3, 2017* -
## Surfaces of cones

The diameter of the base of the cone is 24x cm. The height of the cone is 16x cm. The curved surface area of the cone is 2160pi cm^2. The volume of the cone is V pi cm^3, where V is an integer. What is the value of V. Answer is cm^2. Thanks a lot.

*asked on January 3, 2017* -
## physics

a cannon of mass 400kg fires a shell of mass 20kg. if the shell leaves the cannon at 300ms^-1, with what velocity does the cannon recoil? an a- particle is emitted from a polonium nucleus at a speed of 1.8 x 10^7 ms^-1. the relative masses of the a-

*asked on December 14, 2016* -
## Math

Kevin takes 8 hours to mow 6 lawns. At this rate, how many lawns could be mowed in 32 hours

*asked on December 5, 2016* -
## math

Eldon received 72 on his first calculus test. The marks were normally distributed with a mean of 60 and a standard deviation of 8. He received 80 on the next test, which was normally distributed with a mean of 75 and a standard deviation of 6. Which was

*asked on December 4, 2016* -
## math

The Following Table gives the sales for the Sasquatch Men's Shoe store: Shoe Size , Frequency (number of pairs sold) 4 , 8 5 , 12 6 , 31 7 , 50 8 , 58 9 , 46 10 , 37 11 , 14 12 , 11 1)determine the mean for the distribution, correct to 2 decimal places. 2)

*asked on December 4, 2016* -
## PHYSICS (REALLY DIFFICULT PLEASE HELP)

At a temperature of 18.0°C of 23.0cm^3 of a certain gas occupies has pressure of 103 kPa. (a) What volume would the gas occupy at a temperature of 0.00°C and pressure of 101kPa? (b) 1.00 moles of a certain gas occupies a volume of 22.4 litres at 0.00°C

*asked on December 4, 2016* -
## math

The Following Table gives the sales for the Sasquatch Men's Shoe store: Shoe Size , Frequency (number of pairs sold) 4 , 8 5 , 12 6 , 31 7 , 50 8 , 58 9 , 46 10 , 37 11 , 14 12 , 11 1)determine the mean for the distribution, correct to 2 decimal places. 2)

*asked on December 3, 2016*