Friday

July 25, 2014

July 25, 2014

Total # Posts: 61

**math**

whats the ansewr

**world geography**

they are frozen

**physics**

The electric potential in a certain region is V = a x2 + b x + c, where a = 14 V/m2, b = −19 V/m, and c = 61 V. Determine the position where the electric field is zero. Answer in units of m Please help!

**um reviewing old subjects .. Linear Equations**

Math.. and i dont understand this... plz go throw steps w me.. Like ex: 2 complementary angles a 24 degrees different. How much does each angle measure? Equation1: Equation: Method1: Method2:

**Physical Science**

recks the sled

**6th grade science**

I believe answer B or C would be correct. I hope this helps!

**physics....**

Suppose that the inside length of a microwave oven is 30 cm. If the length of a microwave oven is one half of the wavelength of microwaves used by the oven, find the frequency of the microwaves used in the oven. What is the equation that relates the three of these???

**physics....**

1) Yellow light that has a wavelength of 560 nm passes through two narrow slits that are 0.300 mm apart. An interference pattern is produced on a screen 160 cm distant. What is the location of the first-order maximum? 2) A communication satellite is orbiting 36 000 km above Ea...

**physics....**

Make a list of the characteristics of light that a model should explain: rectilinear propagation, reflection, refraction, partial reflection, partial refraction, dispersion, and diffraction. Briefly discuss how the wave model of light and the particle model of light explain th...

**physics....**

1) Yellow light is incident on a single-slit 0.0315 mm wide. On a screen 70.0 cm away, a dark band appears 13.0 mm from the centre of the bright central band. Calculate the wavelength of the light.

**physics....**

The universal law of gravitation describes the force of gravity between two bodies. What does it say about the strength of the gravitational field? How does the size of the object affect the use of the gravitational field equation? i know that the gravitational field strength ...

**physics....**

1) Thin films, such as soap bubbles or gasoline on water, often have a multi-coloured appearance that sometimes changes while you are watching. Explain the multi-coloured appearance of these films and why their appearance changes with time. 2) Yellow light is incident on a sin...

**track and field**

is a speed of 6.5 on a tredmill for five minutes equal to a good mark for a seventh grade girl to get 67 seconds in the 4 by 400?

**Science**

Explain how fast and slow wind speeds are created.

**math**

Ms.Sue: dont understand question JL:37-2=39,then-59=10 same as (37+-2=39)-59=10

**math**

what is the question

**physical science**

is it possible for people of different masses to have the same power output? Explain

**physics!**

how much work is done by each force acting on vacuum cleaner as it is pulled horizontally 3 m at a constant speed by a force of 50 N at an angle of 30degrees above the horizontal?

**physics!**

great thank you!!!!

**physics!**

how much work is done by each force acting on vacuum cleaner as it is pulled horizontally 3 m at a constant speed by a force of 50 N at an angle of 30degrees above the horizontal?

**algebra**

A rectangle with sides 8 cm and 6 cm and one with sides 10 cm and 9 cm. Find the ratio of the perimeter and the areas of each pair of figures.

**math**

What is the value of cos 138 if the cosin 42 = 0.7431

**chemistry**

In a mixture of ammonia an chlorine with excess ammonia what is the product

**Math**

i had the same question on my pre-al test i couldnt figure it on when i was correcting it so i googled it and here it is! thanks guys!

**Science**

How much rope will be needed to lift a load 48m in a single fixed pulley system if the effort is 63n and why

**Science**

I need help writing a poem about plant cells ,or i can write a letter.It has to have 3-4 facts and has to be done this coming wed. ....I am in 6th grade can someone please help?

**Calculus**

Let f(x)=1x^3+2.5x+3. In this problem you will estimate f'(-3) by computing the average rate of change of f(x)over a small interval. Round your answers to three decimal places. 1. First choose the interval of length .1 with -3 being the left endpoint of the interval. Then...

**precalc. please help:)**

thanks that makes alot of sense:)

**precalc. please help:)**

(square root y-3)^2=(1-square root 2y-4)^2. how do i do this???? i am clueless, pleaseeee help!!!! i^-7. how do I do this please describe! thanks for your time and help, I really appreciate it:)

**precalculus**

The cost of a fill on acrylic nails is a function of how many broken nails. MArtha is charged $34 for 5 broken nails, while Grace is charged $26 for 1 broken nail. a)express the total cost as a fucntion of the number of broken nails. b)What is the slpe of this fucntion and wha...

**precalculus**

write an equation in general form... the perpendicular bisector of the segment with endpoints at (2,-1) and (4,-5). I found the slope and then found the mid point and wrote to the equation and got X-2Y=3. But the answer is X-2Y=9...any help???

**8th grade**

Need some info on the Battle of New Orleans I can't find it in my book

**trig**

give 3 different coterminal angles in radians to: pie/3 i changed that to degree and got 60 degress, but now i'm stuck...i don't know what to do

**trig**

thanks so mcuh

**trig**

is this right... a) give reference angle -200=20 degrees reference angle??

**trig**

converting degrees to radians. a) 95 degrees i did 95/180=19/36 then i did 19 pie/36. and i got 1.7. is that right if not can someone please explain! thanks so much

**physics**

a person is standing on a scale in an elevator that slowing down at a rate of 4m/s/s. the elevator is moving upward. if the persons mass is 80 kg what does the scale read during the period of time that the levator is accelerating?

**physics**

a bus moving at 20m/s slows at a rate of 4m/s each second. how far does it travel while braking. i found the time which was 5 seconds. A car accelerates from rest at a rate of 5 m/s/s for a period of 4.2 seconds and then moves at a constant speed for 8 seconds more. how far di...

**math help please**

two cards are dealt in succession from a standard deck of cards. find the probability that the first card is a diamond or a king. probability that the second card is red given that the first card was a heart. if two dice are rolled, what is the probability of rolling at least ...

**math help please**

i still don't under the simplifying one cause reiny told me that (x+2)! was (x+2) (x+1) but howcome you are telling me that you go up in factorial. i though factorial goes down

**math help please**

two cards are dealt in succession from a standard deck of cards. what is the probability that the second card is red give that the first card was a heart. so i do p(R/H), then i know you go R*H/H. but how do i get the probability please explain! thanks. if 2 dice are rolled, w...

**math**

thanks!

**math**

in the expansion of (x^2+3)^10 what is the coefficient of the term containing x^16. I did 10c4 * 3. But i am not getting the correct answer. can someone please show me how to do this. thanks for your time!

**math**

i have no idea how to do the last one

**math**

How many 4-letter words can be formed by slection four letters from the word UNIFORM? I don't understand how to do this at all. I know the answer is 840 but why? i have no idea how to simplify this... can anyone help? (x+3)!/x+3 (x-2)!/x!

**math**

you are given an exam with only 9 questions. if each question has 4 choices, how many different possible answers can you have for the entire exam?

**MATH PLEASEEEEE**

thanks for your time and your help!

**MATH PLEASEEEEE**

A)If a license plate consists of 2 letters followed by 3 digits or 3 letters followed by 2 digits, how many license plates can be created? B)You are given an exam with only 9 questions. if each question has 4 choices, howmany different possible answers can you have for the ent...

**To Kennedy: math**

please will you put my post up so doc. bob can help me yoo

**To Kennedy: math**

A) 26c2*10c3+26c3*10c2...but im not gettting the right answer. i just didn't feel like typing out my work after each one...but i will, but i'm not getting the right answer! b) (4c1)9 c) 20c5*5p1 happpy????

**physics-major help!**

the object hung from the cable has a weight of 25 N. write the equation for the sum of the forces in the y-direction. what is the tension i nthe cable? has a 30 degree angle. how do i do this pleasee help i don't understand at all!

**math**

which of the following functions have a inverse? f(x)=ab.solute value of x. f(x)=x^3 f(x)=x^4 f(x)=x^3 f(x)=x^4,xless then or equal 0. how do i know if they have an inverser, can someone please explain:) thanks for your time YOOO

**Math**

OHHH thanks reiniyyyy

**Math**

f(x)=1/x, g(x)=3X+1 find: f(g(3)) how do i do thiss... f(g(-2)) g.g, g.f, f.g, pleaseee help:)thanks for your timeee

**Math**

give the domain, range, and zeros of: f(x)=absoulte value of x-3. f(x)=x^2-4x-8 f(x)=(x+1)(x+1)(x+1). f(x)=4 f(x)=-'9x-1)^2+16 y=squareroot x. i don't understand how i konw what the range, domain, and zeros are...please give some answers so i get it

**Math**

i have a question.... when i get a function, how do i konw if it has an inverser... for example, y=ab.solute value x, then -2. i plugged in x=ab.solute val. of y, then -2. but how do i know if that is an inverse??

**Math**

how do i know what the domain is in these problems... i know that domain is the x value but how can i tell what it is? y=1/x y=3/x^2-49 y{x} y=square root of 3-x y=[x].

**discrete math**

if you have 5 signal flags and can send messages by hoisting 1 or more flags on a flagpole, how many messages can you send? please help!!

**discrete math**

in how many ways can 4 different prizes be given to any 4 of 10 people if no person receives more than 1 prize? help please and explain!!!!!!

**discrete math**

Nine people on a baseball team are trying to decide who will play which position. a. in how many different ways could they select a person to be pitcher? b. after someone has already been selected as pitcher, how mandy different ways could they select someone else to be catche...

**discrete math**

how do i solve linear equations? -4(k-2)+3(k+1) =7.

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