Wednesday

November 26, 2014

November 26, 2014

Total # Posts: 4,077

**physics**

Highway safety engineers build soft barriers so that cars hitting them will slow down at a soft rate. A person wearing a safety belt can withstand an acceleration of 300m/s^2. How thick should barriers be to safely stop a car that hits the barriers at 92.8km/h? Answer in units...
*September 14, 2012*

**physics**

An airport has runways only 136m long. A small plane must reach a ground speed of 39m/s before it can become airborne. What average acceleration must the plane's engines provide if it is to take off safely from its airport? Answer in units of m/s^2.
*September 14, 2012*

**Physics**

The barrel of a rifle has a length of 0.916m. A bullet leaves the muzzle of a rifle with a speed of 621m/s. What is the acceleration of the bullet while in the barrel? A bullet in a rifle barrel does not have a constant acceleration, but constant acceleration is to be assumed ...
*September 14, 2012*

**physics**

A subway train starting from rest leaves a station with a constant acceleration. At the end of 7.94s, it is moving at 12.3864m/s. What is the train's displacement in the first 5.57388s of motion? Answer in unites of m.
*September 14, 2012*

**Physics**

A tennis ball with a speed of 14m/s is moving perpendicular to a wall. After striking the wall, the ball rebounds in the opposite direction with a speed of 11.41m/s. If the ball is in contact with the wall for 0.0112s, what is the average acceleration of the ball while it is ...
*September 14, 2012*

**Math**

Multiply & write in simplest form: The mississippi river is about 23/25 the length of the missouri river. If the missouri river is 2,540 miles long, how long is the mississippi river? Thanks
*September 12, 2012*

**English**

So what about "none of us could figure out how the _______ magison had managed to escape the truck submerged into the tank of water
*September 11, 2012*

**Physics**

Initially, a particle is moving at 5.40 m/s at an angle of 37.2° above the horizontal. Two seconds later, its velocity is 6.10 m/s at an angle of 55.0° below the horizontal. What was the particle's average acceleration during these 2.00 seconds in the x-direction ...
*September 10, 2012*

**Physics**

A place kicker must kick a football from a point 29.0 m (= 31.7 yd) from the goal, and the ball must clear the crossbar, which is 3.05 m high. When kicked, the ball leaves the ground with a speed of 17.8 m/s at an angle of 41.0o to the horizontal. By how much does the ball ...
*September 10, 2012*

**english**

yes yes its correct
*September 7, 2012*

**chemistry**

potassium chlorate will decompose to produce potassium chloride and oxygen gas . if you begin with 45 kg of potassium chlorate, how many liters of oxygen gas measured at stp might you expect to produce from this reaction
*September 7, 2012*

**Science**

What is the purpose of a control group in an experiment? a. To serve as a standard of comparison or b. To be the group exposed to changes in the manipulated variable
*September 6, 2012*

**Math**

Convert 60,000 BTU/hr to in.cubic feet/minute.
*September 3, 2012*

**math**

setup an equation or expression to model the situation below: find the shortest distance from the point (2,4) to the curve y=4x^3+1
*September 3, 2012*

**math**

setup an equation or expression to model the situation: a rectangle that would fit inside of the curve y=-x^2+8
*September 3, 2012*

**math**

setup an equation or expression to model the situation below: in one year, sales for a company increase at a constant rate. after two months, the company sells 12,500 products, and after 8 months, the company sells 30,000 products. If the constant rate of increase continues, ...
*September 3, 2012*

**math**

setup an equation or expression to model the situation below: what is the volume of a box that can be created from a sheet of metal that measures 12 inches by 30 inches? assumer there is no top to the box.
*September 3, 2012*

**Econ**

Explain the apparent paradox that saving money if good for the individual but may be bad for the economy. How is this relevant to public policy today?
*September 1, 2012*

**chemistry**

94. mL
*August 31, 2012*

**Health**

What is the Affordable Care Act? A. A program that covers diet counseling for people who are at higher risk for chronic diseases like diabetes and high blood pressure. B. A program that allows people who are at higher risk for chronic diseases to gain free memberships to gyms ...
*August 30, 2012*

**Health**

What are other factors that contribute to being overweight and obese besides diet and behavior? A. Personality and temperament B. Physical fitness and athletics C. Environment and genetic factors D. Smoking and drinking alcohol I think it should be all of them, but that's ...
*August 30, 2012*

**Health**

Thanks again(:
*August 30, 2012*

**Health**

What steps should you take to watch your diet? A. Follow a healthy and realistic eating pattern B. Keep your eating patterns consistent C. Eat breakfast everyday D. All of the above d?
*August 30, 2012*

**Health**

Obesity can cause a person to develop what type of conditions? A. Head, back, and neck pains B. Increased energy and reduced stress C. Low blood pressure and type I diabetes D. High blood pressure and Type 2 diabetes A?
*August 30, 2012*

**Health**

Thanks Ms.Sue :))
*August 30, 2012*

**Health**

What is the best way to lose weight and keep the weight off? A. By losing ½ to 2 pounds a week B. By losing 3 to 5 pounds a week C. By losing 6 to 8 pounds a week D. By losing 10 or more pounds a week A?
*August 30, 2012*

**Health**

What does the U.S. government use to estimate a person’s body weight status? A. Scale B. Ruler C. Body mass index D. Health related illnesses c?
*August 30, 2012*

**Health**

Someone please help?????
*August 30, 2012*

**Health**

Adults and children should limit their intake of sodium because? A. Keeping blood pressure in the normal range reduces an individual’s risk of cardiovascular disease, conges¬tive heart failure, and kidney disease. B. Keeping blood pressure in the normal range reduces ...
*August 30, 2012*

**Health**

According to the government’s My Plate program, half of our plate should have? A. Pasta and breads B. Seafood C. Fruits and vegetables D. Protein and desserts a? or c? idk:/
*August 30, 2012*

**Health**

Americans should drink ________ instead of sugary drinks? A. Energy drinks B. Whole milk C. Water D. Diet soda I put c?
*August 30, 2012*

**Health**

Helllp pleease:(
*August 30, 2012*

**Health**

What are the four basic food safety principles that work together to reduce the risk of food borne illnesses? A. Wash, Cook, Eat, Clean B. Clean, Separate, Cook, Chill C. Clean, Cook, Store, Disinfect D. None of the above d?
*August 30, 2012*

**Health**

Please help:(
*August 30, 2012*

**Health**

________ physical activity and ________ time spent in sedentary behaviors. A. Reduce; increase B. Reduce; reduce C. Increase; reduce D. Increase; increase
*August 30, 2012*

**Health**

Added sugars are defined as ________. A. Sugars and syrups that are added when foods or beverages are processed or prepared B. Sugars and syrups that are not added to foods or beverages C. Sugars and syrups that are healthy for the body D. Sugars and syrups that keep the body ...
*August 30, 2012*

**Health**

then what is it?
*August 30, 2012*

**Health**

Americans are urged to make at least half of their grains whole grains. An example of a food with whole grains includes ________. A. Brown rice B. Pasta C. White bread D. White rice d?
*August 30, 2012*

**Health**

thanks(:
*August 30, 2012*

**Health**

Based upon the government’s research, they recommend that we do what with regard to our intake of dairy? A. Switch to fat-free or low-fat milk B. Drink whole milk C. Avoid dairy if it causes gas D. Eat more ice cream a?
*August 30, 2012*

**Physics**

Man jogs 1.5 m/s. Dog waits 1.8 s then runs at 3.7 m/s. How far will they have each travelled when dog catches up to man? Answer in units of m
*August 27, 2012*

**Physics**

Two ants race across a table 57 cm long. One travels 4.14 cm/s and the other 3cm/s. when the first crosses the line, how far behind is the second one? Answer in cm.
*August 27, 2012*

**english**

2. The complete predicate of the sentence begins with the word A. great. B. met. C. the. D. sailed
*August 24, 2012*

**us history**

how did the New Deal affected gender roles in American society
*August 24, 2012*

**Math**

Betsy is making a flag. She can choose 3 colors from red white blue and yellow. How many choices does Betsy have? I get 8 or 16. Am I right? Do I count choices that are in diferint order as another choice? r w b r b w Is that 1 choice or 2?
*August 22, 2012*

**HEALTH**

maybe B
*August 22, 2012*

**HEALTH**

yeah is c
*August 22, 2012*

**HEALTH**

yeah
*August 22, 2012*

**rockford**

skyscrapers
*August 22, 2012*

**Physics**

This is not an answer!!! Thankyou so much Elena, that was correct and a BIG BIG help. Thankyou so much!!!! This is not an answer!!!
*August 19, 2012*

**Physics**

While working on her bike, Amanita turns it upside down and gives the front wheel a counterclockwise spin. It spins at approximately constant speed for a few seconds. During this portion of the motion, she records the x and y positions and velocities, as well as the angular ...
*August 19, 2012*

**Economics**

Market analysts often use cross-price elasticities to determine a measure of the “competitiveness” of a particular good in a market. How might cross-price elasticities be used in this manner? What would you expect the cross-price elasticity coefficient to be if the ...
*August 13, 2012*

**Economics**

Indicate how an understanding of demand and of elasticity of demand is useful in analysing the following statement. “If total consumer expenditure remains the same after a new tax is imposed on cigarettes then spending on cigarettes will decrease and spending on other ...
*August 13, 2012*

**Math**

when doing formula p=2L+2w how do you do the problem L=2meters and w=1/2 meters and p=?
*August 13, 2012*

**health**

help please
*August 11, 2012*

**math**

4 boards (1 inch X 8inchs X 6feet} and 3 boards (1 inch X 6 inches x 4feet}= how many board feet? 1 board foot =1 inch by 12 inches x 12inches
*August 9, 2012*

**math**

Thank you so much.
*August 5, 2012*

**math**

The formaula works for a rectangle, but this is a circle. How do you convert sides of a circle? The answer is $176.63, but I can't "make it fit".
*August 5, 2012*

**math**

carpet is $25 per square yard. what is cost of circulare rug 9ft in diameter?
*August 5, 2012*

**math**

Thank you, it works.
*August 5, 2012*

**math**

steel is $50 per cubic foot. What is cost of cone with radius 7.5 inches and 25 inches height?
*August 5, 2012*

**math**

-6x+5+5=47 -6x+10=47 -6x +10-10=47-10 -6x=37 --- --- -6 -6 x=37/-6 x=-37/6 check by putting -6(-37/6)+5+5=47. It will balance
*August 5, 2012*

**chemsitry**

hydrogen burns in oxygen to for water.caculate the volume?
*August 3, 2012*

**chemistry **

i had 2 question left to finish but i cant really undersdand how to do it 9)design an elextrochemical cell using Pb(s) and Mn(s) and theire solutions and answer the following questions: i answerd a-i all that is left is j which is: indicate the substance oxidise,substance ...
*July 24, 2012*

**math**

elimination method -3x+4y=19.5 -3x+y=10.5
*July 22, 2012*

**gemetry**

suppose that A=(58,3,4),B=(-2,18,24),and C=(-2,3,4) is triangle ABC a right triangle
*July 18, 2012*

**Chemistry**

What is the freezing point of a solution that contains 10.0 g of glucose (C6H12O6) in 100 g of H2O? Kf for water is 1.86oC/m
*July 17, 2012*

**Chemistry II**

A solution is made by mixing 38.0 mL of ethanol, C2H6O, and 62.0 mL of water. Assuming ideal behavior, what is the vapor pressure of the solution at 20 °C?
*July 17, 2012*

**Chemistry II**

Quinine is a natural product extracted from the bark of the cinchona tree, which is native to South America. Quinine is used as an antimalarial agent. When 3.28 g of quinine is dissolved in 25.0 g of cyclohexane, the freezing point of the solution is lowered by 8.43 °C. ...
*July 17, 2012*

**MAth**

An ice cream cone is 3 inches wide at the widest point, and is 6 inches tall. What is the volume of the cone in cubic inches? Use Pi
*July 5, 2012*

**math**

Solve the problem by stating the equation you would use to solve and then solving it. Be sure to show all of your work. In a local election, 53,400 people voted. This was a decrease of 7% over the last election. How many people voted in the last election? Round to the nearest ...
*July 2, 2012*

**Chemistry**

How many grams of calcium phosphate are theoretically produced if we start with 10.3 moles of Ca(NO3)2 and 7.6 moles of Li3PO4? Reaction: 3Ca(NO3)2 + 2Li3PO4 → 6LiNO3 + Ca3(PO4)2
*June 26, 2012*

**Chemistry**

Reaction: 3Ca(NO3)2 + 2Li3PO4 → 6LiNO3 + Ca3(PO4)2
*June 26, 2012*

**Chemistry**

How many grams of calcium phosphate are theoretically produced if we start with 10.3 moles of Ca(NO3)2 and 7.6 moles of Li3PO4?
*June 26, 2012*

**history**

9. Elias Howe invented which of the following?
*June 25, 2012*

**AFM (MATH)**

a) Write an equation to represent the volume of an open box constructed by cutting congruent squares from the corners of a 24" by 14" piece of cardboard. b) What is the domain of this model?
*June 24, 2012*

**English12**

Below, you will find a list of sentences. After each sentence, select true if the topic of the statement is suitable to form the basis of a single persuasive paragraph. If the topic of the statement in your textbook is unsuitable for a single persuasive paragraph, select false...
*June 21, 2012*

**reading**

i say sunrise
*June 15, 2012*

**THE AGE OF DISCOVERY TO THE AMERICAN EXPERIMENT**

Thank you
*June 14, 2012*

**Social Studies**

1. For revolutionaries like Sam Adams, the term _______ embraced a way of life, a core ideology, and an uncompromising commitment to liberty and equality. A. independency B. republicanism C. federalism D. Americanism 2. Which of the following best describes the Columbian ...
*June 14, 2012*

**economics**

Determine the sum of money that must be invested today at 9% interest compounded annually to give an investor annuity (annual income) payments of $5,000 per year for 10 years starting 5 years from now.
*June 7, 2012*

**Geomtry**

Find the length of segment CE if AE = 8 inches, EB = 10 inches, and ED = 5 inches.
*June 5, 2012*

**Stat**

The salaries at a corporation are normally distributed with an average salary of $29,000 and a standard deviation of $4,000. What is the probability that an employee will have a salary between $22,520 and $23,480? Enter your answer rounded to exactly 4 decimal places.
*June 5, 2012*

**calculus**

The salaries at a corporation are normally distributed with an average salary of $29,000 and a standard deviation of $4,000. Sixteen percent of the employees make more than Sara. What is Sara's salary? Round your answer to the nearest dollar.
*June 5, 2012*

**Calculus**

Thanks a lot for your help, Count Iblis! :)
*June 5, 2012*

**Calculus**

Evaluate the integral: 16csc(x) dx from pi/2 to pi (and determine if it is convergent or divergent). I know how to find the indefinite integral of csc(x) dx, but I do not know how to evaluate the improper integral, at the following particular step. I know I need to take the ...
*June 5, 2012*

**Reimbursement methodologies**

CMS-1450 There is no form ub-4. there is UB-04 CMS_1450 form for out patient claims UB-92 MANAGED CARE
*June 4, 2012*

**Calculus**

Thank you for your help, Bob. I will be more clear regarding exactly where I do not understand. I know I need to take the limit on the upper bound (e.g. A) as it approaches pi from the left side. After doing so, I get ln|csc(x)+cot(x)|. Approaching pi from the left side, I get...
*June 4, 2012*

**Calculus**

Evaluate the integral: 16csc(x) dx from pi/2 to pi (and determine if it is convergent or divergent). I know how to find the indefinite integral of csc(x) dx, but I do not know how to evaluate the improper integral.
*June 4, 2012*

**math**

Let A=number of animals, D=number of dogs, B=number of bunnies, and C=number of cats. Given: 1/2*A = D 1/4*A = B C = 6 C = B Solution: C=B=6 1/4*A=B=6 1/4*A=6 A=6*4=24 D=1/2*A D=1/2*24 D=12 Therefore, there are 12 dogs.
*June 4, 2012*

**math**

You need to post the options given in the question. For instance, the folloiwng are proper ways to express the teacher-student ratio: 1:20, 1/20, 0.05
*June 4, 2012*

**Probability **

Two number cubes are rolled .both cubes are Labelled to 6. The numers rolled are added . What is the probability of each outcome? A) the sum is 12. B) the sum is less then 4. C) the sum is 7. D) the sum is 2.
*May 29, 2012*

**Probability**

Two cubes are rolled .both cubes are labelled 1 to 6.the number rolled are added. What is the probability of each out come ? a) sum is 12 B)the sum is less than 4. C)the sum is 7. D)the sum is 2.
*May 29, 2012*

**chemistry**

the reaction of N2+3H2-->2NH3 is used to produce ammonia commercially. if 1.40 g of N2 are used in the reaction, how many grams of H2 will be needed?
*May 28, 2012*

**physics**

A 0.93 kg block is shot horizontally from a spring, as in the example above, and travels 0.539 m up a long a frictionless ramp before coming to rest and sliding back down. If the ramp makes an angle of 45.0° with respect to the horizontal, and the spring originally was ...
*May 28, 2012*

**Precal**

What is the standard form of this parabola: -2x^2+16x+24y-224=0 Please Help, parabolas are evil.
*May 25, 2012*

**Maths**

An irregular octagon R has vertices 6, 2), (2, 6), (−1, 5), (−5, 1), (−6, −2), (−2, −6), (1, −5) and (5, −1). Using standard notation, write down the elements of the symmetry group S(R) of R, giving a brief description of the ...
*May 24, 2012*

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