# Posts by sophie

Total # Posts: 477

**Physics...help!**

Light passes from air into water at 45.0 degrees to the normal. If the index of refraction of water is 1.33, find the angle of refraction. A. 25.5 degrees B. 32.1 degrees C. 44.0 degrees D. 55.9 degrees I believe it is B? What is the nature of an image formed by a concave ...

**Physics**

it isn't C or D, it's A..

**Physics**

A 5.0 cm real object is placed at a distance of 5.0 cm from a concave mirror of focal length 10 cm. Find the size of the image. A. 5 cm B. 10 cm C. 17 cm D. 20 cm I think it is B? A(n) _______ lens is used to produce a real image. A. convex B. concave C. plane D. diverging Is ...

**physics**

Q=mC(Tf-Ti) heat transfer is equal to the mass of an object time the specific heat of the object times the difference between the final and initial temperatures.

**physics**

A 5.0-cm real object is placed at a distance of 30.0 cm from a concave mirror of focal length 10.0 cm. Find the location of the image. A. 6 cm B. 10 cm C. 15 cm D. 60 cm Is it B. 10 cm? Which of the following objects can set fire to a piece of paper in the presence of sunlight...

**physics: true or false**

yeah, so it is false

**physics: true or false**

A concave mirror of focal length 10 cm forms an upright and diminished image of a real object placed at a distance of 5 cm from the mirror. A. True B. False A convex lens is used to obtain an enlarged virtual image. A. True B. False Not too sure on the first one... the second ...

**Physics: true or false**

A convex mirror forms a virtual, diminished, and upright image for all real objects regardless of the location of the object. A. True B. False Is it true? A convex mirror of focal length 10 cm forms an upright and magnified image of a real object places at a distance of 20 cm ...

**Physics**

What must be the minimum height of a plane mirror so that a boy of height 162 cm can view himself from head to toe? A. 40.5 cm B. 81 cm C. 162 cm D. 324 cm It would be B. 81 cm?

**physics! help!**

nevermind it was B

**physics! help!**

For incomplete cancellation to occur, opposite pulses must have A. equal amplitudes B. different energies C. equal pulses D. equal displacements is it B??

**Physics!!**

thanks!

**Physics!!**

A car moving at 16.0 m/s, passes an observer while its horn is pressed. Find the difference between the frequencies of sound heard when the car approaches and when it recedes from the stationary observer. The velocity of sound is 343 m/s and the frequency of the sound of the ...

**physics**

thanks

**physics**

Shaking a towel up and down would create what type of wave in the towel? A. Transverse <---answer (I think) B. longitudinal C. surface For the medium to remain undisturbed as two pulses pass the same point, they must have A. equal amplitudes B. opposite amplitudes C. ...

**Physics: true or false**

Thanks

**Physics: true or false**

Doubling the amplitude of a wave will double the amount of energy the wave can transfer. A. True B. False <---answer (not sure) The medium determines the speed through which most mechanical waves will travel. A. True <---answer (not sure) B. False

**Geometry**

a- 176 is the mean not sure on the rest, sorry

**Physics: waves**

You are creating a transverse wave in a rope by shaking your hand from side to side. Without changing the distance that your hand moves, you begin to shake it slower and slower. What happens to the frequency? What happens to the amplitude? What happens to the wavelength? A. it...

**science**

no problem! (:

**science**

Disonformity is a type of uncomformity so I don't think so

**science**

they are similar and can be compared

**math**

Oops, I messed up on the math.... haha! I meant, 9/16

**math**

For example, 3/4 divided by 4/3 you would flip 4/3 to 3/4 and multiply them, so it would be: 3/4 times 3/4 = 9/36 or 1/4

**physics**

carol and bruno drag a box of mass 58.0 kg along a frictionless floor. Carol pushes the box with a force of 11.4 N at an angle of 40.0 downward from the horizontal. Bruno pulls the box from the other side with a force of 11.0 N at an angle of 40.0 above the horizontal. What is...

**Physics**

The melting point of a solid is 90.0 degrees C. What is the heat required to change 2.5 of this solid at 40.0 degrees C to a liquid? The specific heat of the solid is 390 J/kg (K) and its heat of fusion is 4000 J/kg. A. 4.9 10^4 J B. 1.0 10^4 J C. 5.9 10^4 J D. 5.0 10^4 J I am...

**math**

28(.30) $8.40 is the discount and you subtract this from $28 so, it will cost the employee $19.60.

**Physics help!**

I found the answer, never mind

**Physics help!**

Heat is added to an open container of a liquid. The liquid is brought to its boiling point and half the liquid boils away. Which of the following graphs shows how the temperature changes with this time period? Would the graph be just an ascending line?

**Business Communication**

yes, you are correct. B makes sense more than the others.

**Physics help!**

The thermal energy of the particles in a gas is related to the temperature of the gas. A. True B. False This question is a bit tricky, but I think it is true?

**catering**

I would say C, because it's an outing but I'm not sure.

**Physics: true or false**

That is true, it is not only kinetic energy

**Physics: true or false**

1. In a gas kept at a constant temperature, all molecules move with the same speed. A. True B. False 2. A hot object has more thermal energy than a similar cold object only because of greater kinetic energy. A. True B. False 3. The thermal energy of the particles in a gas is ...

**9th grade math**

x^2-10=0 x^2=10 (add 10 to both sides) x= 3.16 (square root of 10)

**Business Communication**

You're right, A is not a complete sentence.

**Physics**

It has to be one answer though... thanks anyways (:

**Physics**

Which of the following physical properties can be used to measure temperature using a thermometer? A. volume B. pressure C. density D. viscosity I think the correct answer is D?

**art**

ok thank-you!

**art**

hello me again! i am now looking at the wounderful painting of "little blue horses" by Franz Marc, dose anyone know any good websites where i can find the background history of this painting! i would be very greatful, an also if anyone konws of any quotes that i ...

**art**

what is franz marcs most famous painting(appart from the yellow cow)

**art**

does anyone know where the yellow cow painting by Franz Marc i displayed?

**art**

thanks

**art**

i am doing a project about franz marc an i need some info on one of his animal paintings this info consists of: name: when it was made: how it was made: what it was about: does it tell a story: what is in it: is it happy sad boreing etc: how you feel: and many more! but i don...

**art**

i have to write a full A4 page with no pictures about Franz Marc but i can not find enough info i have when he was born where an when he died an some other stuff but i am not sure what else to think of an put in!!!

**algebra**

solve the following equation 5x + 4y = 12 Please show work... Thank You!!!

**Math**

Sove the equation in Rational form -2x - 4 < 10

**Math**

Solve the following by Factoring.. 5t^2 - 10t = 0

**biology**

i really need some help!! i understand the parts of the heart and their names, but i am really confused on the cardiac cycle graph that shows the pressure of the heart at certains stages HELP ME PLEASE!

**chemistry**

haha dunno

**statistics**

do all populations- micheline tires, voters, people with high blood pressue...- produce a normal curve? True or False Is this false because all samples produce normal curves and not the populations, and don't you have to have a range of values and freequencies to have a ...

**art**

thanks.. im making my box its kind of retro neon colours, i have all luminous bright colours splattered all around it , at the back i drilled holes in and iv made a type of corset lace look , with the bright orange pink and green lace, inside ive got half a barbie hanging, ...

**art**

i have to do a box all about me, i just can't think on what to do? maybe a catwalk but like what?

**French**

it is feminine :)

**english**

i don't know what an understood pronoun is

**math**

an octagon has 8 sides. how many diagonal does an octagon have

**math**

how many arrangements can be formed from all the letters in the word parallel?

**math**

solve for n where it is p(n,5)=42xP(n-3)

**poetry/ english**

go to wikianswers . com no one rude about needing help there.. -Sophie

**Chemistry**

but what equation is used to find it? the delta H/RT equation won't solve for anything

**Chemistry**

The solubility of benzoic acid in water is 2.56g in 100cm3 at 79 C and 0.29g in 100cm3 at 20 C. What is the minimum volume of water in which 1g of benzoic acid can be dissolved at 79 C? I set up a dimensional analysis but since the question gives 2 sets of results, I do not ...

**Algebra/Geometry**

i have homework and we have to name this shape below and note one of it's specal properties;i have traiedlooking on pc but i don't know the name of it;have eney one got an idear.r.s.v.p. Sophie-opel evan

**Chem**

Assuming the final concentration of chloride anion after the addition of HCl (precipitation step) was 0.1M, what is the remaining concentration of Ag+ in the solution? (pKsp for AgCl = 9.74)

**Chemistry**

this really helped me thank you

**polarity**

could you put these in order of polarity please: fluorenone, fluorenol and fluorene. Thanks

**geography**

kilder was the firts place found

**Science (big idea of energy)**

The big idea of energy is explaining it as though it is something else

**maths and english**

i have trouble with my subtractioin i also have problems with my spellings please help Please check these sites for games to help you improve your spelling. http://www.funbrain.com/spell/index.html http://www.eduplace.com/kids/hmsv/smg/ Please post a subtraction problem that ...

**english**

my writing is not very nice and neat should i practice more Here is what you can do: Start a Journal (blank book), writing on alternate pages. Write in it every day. Weekly, give it to a trusted friend (mom, aunt, friend) who can take the journal and mark up errors. Rewrite ...

**Probability help!?**

Mario had 9 green,8 red,10 brown,6 Orange,and 9 blue m&ms what fraction of the m&ms are orange

**Statistics**

is the answer correct?

**Geography**

this sucks these teachers torture children just cos they have forgoten their days

**physics**

why use a 3 wire system instead of a 2 wire system when wiring an electric heater with metal casing So the metal casing can be "grounded" andnot aquire the potential lethal voltage if a 110 V wire inside becomes loose, wet or loses its insulation. If this happens, ...

**Physics! PLEASE HELP re Newton's Laws**

What would you do given the following scenarios? 1. You are the capitan of a spacecraft traveling in the far reaches of outer space, a great distance from any other body. Unexpectedly your radar indicates a meteor on a collision course with your craft, necessitating a sudden ...

**Physics- Newton's Laws in Space**

Hi! I would really appreciate it if you could help me think through these questions discussing Newton's Laws in Space... Directions: Consider the following scenarios ignoring the effects of gravity: 1. You are the capitan of a spacecraft traveling in the far reaches of ...

**Geometry**

How do you find the angle of FAC when: D is in the interior of <BAE E is in the interior of <DAE F is in the interior of <EAC m<BAC=130 degrees m<EAC=100 degrees m<BAD=m<EAF=m<FAC ? FAC is 40 degrees. All of these lines are linear pairs held on an 180 ...

**Density**

thankyou and i love you