Sunday

April 20, 2014

April 20, 2014

Total # Posts: 345

**Physics**

If a bobsled with a total mass of 250kg, reaches the bottom of the hill at a speed of 92mph, how tall was the hill? I do not understand how to create the formula. I know that 92mph = 134.933 ft per second & that 1 mile = 5280 ft. Would I take the (92)mph x (5280) ft per mile ...

**Physics**

If a bobsled with a total mass of 250kg, reaches the bottom of the hill at a speed of 92mph, how tall was the hill?

**biology**

why aren’t there vaccines for every disease?

**chemistry**

) Mare is preparing an experiment using 3 cups, one made of paper, one of plastic and one of glass. She plans on pouring 50 ml of hot water from a pitcher into each of the 3 cups and record the temperature in 5 minute intervals. What is the independent variable in this investi...

**chemistry**

Mare is preparing an experiment using 3 cups, one made of paper, one of plastic and one of glass. She plans on pouring 50 ml of hot water from a pitcher into each of the 3 cups and record the temperature in 5 minute intervals. What is the independent variable in this investiga...

**physics**

Hans uses a wheelchair. Although he has a rampto in his house, he finds it difficult to get his wheelchair up the ramp. Whcih modification would make it easier for Hans to get in his house? a. increase the length of the ramp b. increase the friction between the wheels and the ...

**spanish**

Here is my translation -------------------------------- Let's just say I am talking of Madrid There where the roads are crossed where the sea cannot be conceived where returns always the fugitive …Let's just say I am talking of Madrid. Where the desire travels in ...

**spanish**

What is the meaning of this lyrics? I have translated this but I do not understand what he is talking about. The lyric meanings are abstract to me. Please help me! Pongamos que hablo de Madrid Allá donde se cruzan los caminos donde el mar no se puede concebir donde regr...

**grammar**

B is the best choice.

**MLA english question**

My professor told that I can pick what to use. If you are doing in-text citations then you don't need footnotes and vice versa.

**computer**

All in one computer security system is good because it makes it easier to manage everything. You know that all of the antivirus,antispyware, and firewall will not conflict with one another because they made by the same company. All in one security system protects computers aga...

**Calculus (for Business)**

Could you please show me the math behind answer a? How did you calculate the limit to get infinity?

**Calculus (for Business)**

Suppose a fish swimming a distance of L ft at a speed of v fit/sec relative to the water against a current flowing at the rate of u ft/sec (u<v) expends a total energy given by E(v)= (aLv^3)/(v-u) Where E is measured in foot-pounds and a is a constant. a) Evaluate the limit...

**history**

Dwight David Eisenhower

**math**

The area of a rectangle= LengthxWidth let x= the length of one side of the square garden A(x)= (x+3)(x-3)

**mental health**

i need to provide an example of how my own values and beliefs impact on my work with individuals experiencing mental illness

**Physics**

The mass of a car is 2400 kg. the constant power supplied by the engine is 60 kW and the car starts from rest. What is the speed of the car at the end of 2 seconds?

**math**

The mean systolic blood pressure of adult males is normally distributed with a mean of 138 (millimeters of mercury) and a standard deviation of 9.7. What percent of adult males have blood pressure between 161.28 and 164.9?

**math**

my daughter needs help finding a mystery number. 1)when the mystery number is divided by 3,there is a remainder of 1. but it has to be the same thing over again with 4 remainder 2 and 5 remainder 4.And there is one more what is the smallest number that could be divided by the ...

**College Math**

Thanks

**College Math**

Thanks

**College Math**

Im having a hard time trying to figure out how to do this problem: A plane can fly 150 mph in calm air. Flying with the wind, the plane can fly 350 mi in the same amount of time it takes to fly 250 mi against the wind. Find the rate of the wind.

**Math**

Thanks. Thats the answer i had and the a was in the radical. so do the answer come out to be 3(Radical 3a)

**Physics**

I tried solving this using by drawing it out, using trig and newton's laws to calculate Fx and Fy and used these values to calculate work in x-direction and y-direction. Finally I used Workx and Workx to find overall work with pythagoras....is this correct? I got 6.21J as ...

**Physics**

An object is placed on an inclined plane which forms an angle B = 18º with the horizontal. An external force F of magnitude 14.3 N is applied to the object. The force F acts in a direction which forms an angle A = 62º with the horizontal. As a result of the force F, ...

**Physics**

Yes I see what you're saying after drawing the diagram...So for the first bit we just use plain substitution of GPE formulas and second bit is trig. =) thanks that seemed easier than i thought.

**Physics**

A pendulum consists of an object of mass m = 1 kg swinging on a massless string of length l = 258 cm. The object has a speed of 1.6 m/s when it passes through its lowest point. What is the greatest angle with the vertical that the string makes during the motion of the object? ...

**calculus**

Thanks for your help. It helped me figure out the correct answer. The second derivative is 240x^3+360x^2-1800x. From there I factored and got 120x(2x^2+3x-15)=0. then used the quadratic formula to get (-3+sqrt129)/4, (-3-sqrt129)/4, and 0.

**calculus**

Thanks for your help. It helped me figure out the correct answer. The second derivative is 240x^3+360x^2-1800x. From there I factored and got 120x(2x^2+3x-15)=0. then used the quadratic formula to get (-3+sqrt129)/4, (-3-sqrt129)/4, and 0.

**calculus**

Consider the function f(x)=12x^5+30x^4–300x^3+2. f(x) has inflection points at (reading from left to right) x=D,E, and F. where D is___, E is____, and F is____.

**Math**

5 doller bills and 3 dimes

**Spanish**

Are you sure? I was thinking the first one is era because it describes a person.

**Spanish**

Hi, I was wondering if you would use "era" or "fue" in these sentences: La persona que se murió más recientemente era (fue?) una mujer. El deiciocho de agosto era (fue?) la fecha que ella fue al hospital. Thanks for the help!

**calculus**

The slope of the tangent line to the parabola y=4x2–6x+6 at the point where x=5 is: The equation of this tangent line can be written in the form y=mx+b where m is: and where b is:

**math**

have a good night mathmate.

**math**

yeah, I was messin up on that part, but now I have the same result as you. Thanks Mathmate. LoL

**math**

nevermind I got it, thanks.

**math**

this is what I did 56 567 *11.400 00.000 000.000 2626.800 56567.000 565670.000 which all =624863.800

**math**

I got 624863.800.

**math**

I am doing long multiplication and I need help. 56 567*11.400=

**Science (Grade 8)**

are you asking for their formulas?

**Medical Physics**

A 18000kg airplane lands with a speed of 77 m/s on a stationary aircraft carrier deck that is 115 m long. Find the work done by nonconservative forces in stopping the plane. I have an exam on this tomorrow and I am confused any help would be appreciated.

**Physics university **

ugh confused

**literary **

what is tone, mood, and irony?

**literary **

what is foreshadowing and what is flashback?

**Twilight**

5,000,000

**Geography Hook for Presentation**

We're comparing the historical tornadoes that passed through both areas, however we're just looking for a generalized tornado hook to begin our presentation

**Geography Hook for Presentation**

Were doing a 5 minute presentation to the class on tornadoes comparing the Tornados in Region, to Barrie Canada. Just wondering if anyone had any creative ideas we could use to hook the class in to this topic! any suggestions would be wonderful, Thanks

**Physics**

Imagine a right-angle triangle with angle θ = 40o on the left. The serves as an increasing slope. On the slope is an object of mass m1= 340 g on an inclined surface. The angle of the inclined surface is θ = 40o with the horizontal. The object m1 is connected to a sec...

**literary**

Hero

**calculus**

I am suposed to solve for x if the FUNCTION is equal to 5.

**calculus**

well it said that in the book but it wants you to solve for x IF the function is equal to 5.

**calculus**

The equation of the function is: f(x)=4-2(x-6)^1/3, for x not equal to 5 calculate precisely the value of f(x). so I got this: 5=4-2(x-6)^1/3 1=-2(x-6)^1/3 (-1/2)=(x-6)^1/3 (-1/2)^3=(x-6) -.125=x-6 now the next step is suposed to be this but I don't understand how they got...

**Social**

yes, but fiction can still be history even if it was off the top of someones head. Someone telling a story about someone else who was in a different time period. They may not have exact information from that person. But the information they useis still believable. It puts the ...

**Social**

Why is history better than fiction?

**University Physics**

A small box is held in place against a rough vertical wall by someone pushing on it with a force directed upward at 28degrees above the horizontal. The coefficients of static and kinetic friction between the box and wall are 0.40 and 0.30, respectively. The box slides down unl...

**Physics but algebra problem**

Thanks so much!!!!

**Physics but algebra problem**

Where i am having a problem to....Do you have same prob James? Acceleration is stumping me.

**Physics but algebra problem**

I'm not sure how to do the algebra the m in the denominator is confusing me. 0_0 so sorry i'm so difficult i feel stupid. not sure how to solve for m.

**Physics but algebra problem**

huh?? 260,000 Newtons?

**Physics but algebra problem**

Prob is I not sure exactly how to do the algebra when I plug in the a. and doesn't the m just cancel out? 0_0

**Physics but algebra problem**

When you lift a bowling ball with a force of 89 , the ball accelerates upward with an acceleration . If you lift with a force of 99 , the ball's acceleration is 2. I'm guessing a is 9.8 m/s since it's gravity. I trying to figure out the weight w and acceleration a....

**Physics but algebra problem**

Having issue with algebra. 89N=ma 99N=m2a would you do something like plugging one into the other such as. a=89/m 99N=99/(2(89/m) prob is when i get a fraction in the denominator i get confused can someone help me. I'm trying to find the mass. Which i will then convert int...

**Math**

How do I solve this math problem.. (-11-6--5+1+3x2) divided by -5

**Physics**

Thx I got it!!!

**Physics**

The archerfish hunts by dislodging an unsuspecting insect from its resting place with a stream of water expelled from the fish's mouth. Suppose the archerfish squirts water with a speed of 2.45 m/s at an angle of 53.0 degrees above the horizontal, and aims for a beetle on ...

**social studies**

may you please name 1 or more explore(s) that searched for a northwest passage?

**biology**

respiration works better at higher temperatures because the higher the temperature the more you sweat and the more you sweat more respiration occurs. TELL ME WAT U THINK!

**AP World History**

Thank you very much! They helped me (:

**AP World History**

Who can compare&contrast North American racial ideologies with Latin American/Caribbean racial ideologies from the years 1500-1830? Where can I get information about this topic?

**Math**

If h(x)=3/(2x+1), find h(2)

**economics**

thanks

**economics**

Hi. I was wondering if someone could please tell me what states are getting the most stimulus money to stimulate new job creation? Thanks.

**Essay**

I'm doing an essay on allergic reactions and I have to tell about the symptoms. I have a question, fever is not a symptom is it?

**Latin**

I am trying to write "there are many islands" in Latin. How do you say there? Or can you just start with "are"? Would many islands count as a predicate nominative, or is it would you go into the accusative tense? Thanks!

**chemistry**

Answer the following for a primitive cubic unit cell. Answers should be numerical, set r = 7.0. edge in terms of r, the lattice pt radius=? face diagonal in terms of r, the lattice pt radius=? body diagonal in terms of r, the lattice pt radius=?

**Math**

what is 13 1/2 - 11 5/16?

**physical**

how do i get a 45 year old inactive male who weighs 280lb and has a body comp of 55% lean mass and 45% fat mass.down to his goal! his goal is to alter his body comp to 80%-20% and lower his weight to 200lbs

**spanish**

I updated my paragraph. Can you see if this is written correctly? Yo soy una buena candidata porque soy siempre flexible, dedicada, y trabajadora. Hace más de cinco anos que nado. Me he entrenado para ser una salvavidas. Me gusta estar al aire libre y cerca de una pisci...

**chemistry**

An aspirin tablet weighing 0.475 g has been analyzed and contains 68.2 % ASA (180.16 g/mol) by mass. A student dissolved the tablet in hot NaOH and the cooled solution was diluted with DI water to the mark in a 250 mL volumetric flask. Exactly 3.00 mL of the solution was pipet...

**chemistry**

What is the % transmittance for each of these errors Washing a cuvette with DI water, then failing to rinse it with the solution to be measured Failing to wipe off fingerprints from the cuvette. Changing the wavelength from maxtomax+10 nm.

**math**

how far is it from California to colodrado?

**math**

(1/x - 3/x+4) / (1/x square - 16) please help me with this question if you can show the work or explain how to solve.

**math**

the concentration of a mixture is guven be the following function: c(t)=(2x+9)/3(x+12) A.what is the maximum amount of concentration that this function can reach in terms of percent? B. what is the name of the line you looke for to answer part A.

**ms. sue, english please!**

What if assistant teaching is being used as a verb? Hyphenated or not? As in: I have been assisant teaching with my grandmother for four years.

**english**

Really? I thought it was hyphenated.

**english**

Is 'assistant-teaching' connected by a hyphen or should it be two separate words? Thanks!

**Question??? English**

ooo...yeah so this are the answer chooses...sorry to mention that...jejeje

**Question??? English**

1. a Christmas feast 2. a new dress 3. a doll 4. a beautifully decorated Christmas tree

**Question??? English**

In The Year of the Perfect Christmas Tree, what Ruthie wants for Christmas is 1. a Christmas feast. 2. a new dress. 3. a doll. 4. a beautifully decorated Christmas tree.

**6th grade**

woopsy looks like 10 mins are up

**My short Story called deeper ever deeper**

It's good, though there may be some grammer mistakes. I didn't know it would have a sad ending though. Overall, a good story

**Health**

If I have 20/70 vision what is the power of the lenses needed to correct my vision (how do I calculate it?)

**math**

thank you u save my life

**math distributive property**

what is the answer to 5{45+5}=

**5th grade**

how many thousandths are in a hundredth?

**pre algebra**

the number of months in y years

**math**

How do you do array multiplication? e.g. 59 times 67

**Math**

because he has no tea

**physics**

A 4400 kg car can acceletare from 0-25 m/s in 4 seconds. What force must the engine created to accomplish this acceleration? 176 N 1100 N 17600 N 27500 N An elevator is moving up with an acceleration of 3.36 m/s squared. What would be the apparent weight of a 64.2 kg man in th...

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