Posts by zachary
Total # Posts: 134

Physics
A concave spherical mirror has a radius of curvature of 29.4 cm . The object distance is 5.7 cm .Scale: 10 cm = Find the magnitude of the image distance. Answer in units of cm. 2 Find the magnification. 
physics
Calculate the position of the image when an object is placed 0.492 m from the mirror. Answer in units of m. 
physics
A concave mirror has a radius of curvature of 1.61 m. Calculate the position of the image produced when an object is placed 2.66 m from the mirror. Answer in units of m. 
physics
An excited atom emits a photon of a certain frequency. Then two photons of this frequency fly towards the atom. Which of the following is likely to happen next? 1. An atom will emit another photon of the same frequency. 2. The atom will absorb one of the photons and will ... 
Math
A charity raffle offers a first prize of $1,000,000, a second place prize of $100,000 and a third place prize of $10,000. A total of 500 000 tickets will be sold. What price should be charged for a ticket in order for the charity to make a 60% profit on this raffle? 
Math
In its Flip Your Lid contest, a coffee chain offers prizes of 50 000 free coffees, each worth $1.50; two new TVs, each worth $1200; a snowmobile worth $15 000; and a sports car worth $35 000. A total of 1 000 000 promotional coffee cups have been printed for this contest. ... 
physics
Two workers are sliding 450 kg crate across the floor. One worker pushes forward on the crate with a force of 380 N while the other pulls in the same direction with a force of 380 N using a rope connected to the crate. Both forces are horizontal, and the crate slides with a ... 
Physics
Consider the motion of the two projectiles fired at t = 0. Their initial speeds are both v0 but they are fired with different initial angles ?1 and ?2 with respect to the horizontal. What is the ratio of the times of the flights? 
Chemistry
Consider the Unbalanced Reaction: Al2O3(s) + CO(g) ? Al(s) + CO2(g) Estimate ?G at 298 K if 7.1 moles of Al2O3(s) is reacted. 
Physics
Alice is going on a picnic and is aware that it will be easier to carry the picnic basket if it balances at the center where the handle is attached. She has placed a 2.15kg container of potato salad at one end and a 0.750kg package of hot dogs at the other end of a 52.0cm ... 
lego robotics
WHY DID THEY NOT LET ME IN!!!!!????? 
Math
Jan and Susan went to the movies.it was 2 hours and 18 minutes long.it ended at 6:00.what time what time did it start 
Math
1. Find the horizontal change and the vertical change for the translation P(4,4) (4,7) A. Right 8; up 11 B. Left 8; down 11 C. Right 8; down 11•• D. Left 8; up 11 2. The point c(x,y) is reflected over the xaxis. Use arrow notations to describe the original point ... 
Math
The point (3,1) is translated to the left 4 units and up 1 unit.write a rule to describe the translation.what are the coordinates of the image point? A) (x,y)>(x+4,y+1);(7,2) B) (x,y)>(x4,y1);(1,0) C) (x,y)>(x+4,y1);(7,0) D) (x,y)>(x4,y+1);(1,0) •... 
Language
In which sentence is the meaning of the word astonish expressed? A. Marley says that nothing will surprise Scrooge, given all that he has seen.•• B. Christmas present asks Scrooge to touch his robe. C. Fred's wife expressed her pleasure at the amount of laughter ... 
Language
in which line is the opposite of the word audible best expressed? " Spirit tell me if Tiny Tim will live" " Save your Breath Mr. Scrooge. You can't be...... heard"•• "I'll drink to his health for your sake..... But not for his sake&... 
Language
In which of those lines is the meaning of the word intercede best expressed? A. The attacker between the goal and goalie. B. In court cases, attorney intercede on their client's behalf.•• C. If you don't agree with someone you should try to Intercede. D. In ... 
Math
3. Determine which ordered pair is a solution of y = –5x + 10. (1 point) (–15, 5)•• (2, 0) (–1, –5) (3, 25) Correct my answers 
math
Mimi's market sold 24 heads of lettuce one morning. That afternoon 2/7 of the remaining heads of lettuce were sold. The number of heads left is now 1/2 of the number the market had at the beginning of the day. How many heads of lettuce were there at the beginning of the ... 
Math
Explain how u can write 35% as a sum of 2 benchmarks percents or as multiple of a percent? PLEASE TELL ME!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!:) 
Math
$480 
math
3×50=150 
ENGLISH
I have not winced nor cried aloud.sight 
ENGLISH
give me 5 lines that sensory images please. I can't identify 
ENGLISH
Please help me to pick out 6 lines from the poem Invictus of William Ernest Henley that used sensory images and identify the sense used for each line.I also need to pick out one line that used onomatopoeia. I only Have one answer Black as the pit from pole to polesight 
science
Is it bad to shave the pubic hair? Why or why not? How does shaving affects the growth of pubic hair? 
english
I don't have nothing to see 
english
Black as the pit from pole to polesight 
Computer
Our professor wants us to get more likes on our facebook account. Can anyone tell how? 
Computer
I tried some of these but they don't work. 
Computer
Our professor wants us to get more likes on our facebook account. Can anyone tell how? 
ENGLISH
Thanks a lot Writeacher. This website is really a blessing for usstudents and anyone who wants to learn. 
ENGLISH
1.feel 2.nod 3.look 4.explain 5.offer 
ENGLISH
1. made them feel 2.noticed the witness nod 3.saw his players 4.let her students 5.heard the officers offer 
ENGLISH
Here are my answers 1.make them feel the need 2.noticed the witness nod 3.saw his players look 4.let her students explain 5.heard the officers offer 
ENGLISH
CHOOSE THE BARE INFINITIVE IN EACH SENTENCE. 1.make them feel the need to rise and give you a hand. 2.The judge noticed the witness nod his head with approval. 3.The coach saw his players look at one another with enthusiasm. 4.The teacher let her students explain their ideas. ... 
ENGLISH
okay thanks. 2.disorganized 6.amazing 11.frozen 
ENGLISH
Can you give me your final answers writeacher, please? Thanks a lot 
ENGLISH
1.ringing 2. meeting 3.speeding 4.boiled 5.wrinkled 6.told 7. sliced 8.Clashing 9.winning 10.challenging 11. warmed 12.injured 13.Recycled 14.terrifying 15.used 
ENGLISH
IDENTIFY THE PARTICIPLE IN EACH SENTENCE. 1.No one answered the ringing phone. 2.The meeting, noisy and disorganized, was a waste of time. 3.The speeding car almost crashed. 4.A boiled egg has fewer calories then a hamburger. 5.She wore a wrinkled blouse. 6.Grandmother told us... 
Social Studies
how does the work of geographers in government differ from those in the busines world 
Calculus Help and Check
both answers are wrong correct answer = $170,000 
Chemistry
How exactly do you get pH from Ka? 
Chemistry
The following questions refer to the following acids and bases. A) Hydrazoic acid HN3 Ka = 1.9 x 10^5 B) Hydrofluoric acid HF Ka = 6.8 x 10 ^4 C) Nitrous Acid HNO2 Ka = 4.5 x 10^4 D) Phenol C6H5OH Ka = 1.3 x 10^10 E) Aniline C6H5NH2 Ka = 4.3 x 10^10 1) which compound is ... 
Strayer
Which of the following units could be associated with a vector quantity 
Science check answer quick!
1) Earth's gravity acts on people inside a space station orbiting the earth. 2) It applies to any two objects at any location. 3) the entire earth, located one earth radius away 4) 2.8 days 5) 200 N 6) 1.67 x 10^9 N 7) 7.70 km/s I just took this quiz. These are the answers. 
Social Studies (History)
When searching for evidence to support a claim, what are important things to remember? Please explain your response. 
Check my answers please Physics
1. A force that makes the net force on an object zero. 2. It is equal in magnitude and opposite in direction. 3. An moving object in equilibrium continues at a constant velocity. 4. 5N 5. 8.5N 6. 24N 7. 90N 
Physics
1. A force that makes the net force on an object zero. 2. It is equal in magnitude and opposite in direction. 3. An moving object in equilibrium continues at a constant velocity. 
physics
A certain LCD projector contains a single thin lens. An object 23.5 mm high is to be projected so that its image fills a screen 1.87 m high. The objecttoscreen distance is 3.05 m. (a) Determine the focal length of the projection lens. mm (b) How far from the object should ... 
urgent urgent algebra / precalculas
1. Given a function,H(x)explain how to find the components f(X)AND g(x) such that f(g(x)) = H(x) 2. let H(x)=(2x+5)^4 find the function f and , so that f(g(X))=H(x) 
urgent urgent algebra / precalculas
For # 1, im getting stuck on this problem i don't understand this 1.4 = e ^ (0.03k) Now take the natural logarithm of both sides to solve for , ln 1.4 = ln e ^ (0.03k) ln 1.4 = 0.03k * ln e Recall that ln e = 1. ln 1.4 = 0.03 k Solve for k. Then try part b. For # 2, y = 3... 
urgent urgent algebra / precalculas
rewrite each in exponential expression as a logarithmic expression log, x=4 log 5=2 log b=x 
urgent urgent algebra
rewrite each in exponential expression as a logarithmic expression a)log,x=4 b)log 5=2 c)log ,8=x 
algebra URGENT HELP
cohol and Driving The concentration of alcohol in a person’s bloodstream is measurable. Suppose that the relative risk R of having an accident while driving a car can be modeled by the equation R = e kx where x is the percent of concentration of alcohol in the bloodstream... 
urgent urgent algebra / precalculas
lcohol and Driving The concentration of alcohol in a person’s bloodstream is measurable. Suppose that the relative risk R of having an accident while driving a car can be modeled by the equation R = e kx where x is the percent of concentration of alcohol in the ... 
urgent urgent algebra / precalculas
Alcohol and Driving The concentration of alcohol in a person’s bloodstream is measurable. Suppose that the relative risk R of having an accident while driving a car can be modeled by the equation R = e kx where x is the percent of concentration of alcohol in the ... 
urgent urgent algebra
find the composite function fog f(X) = 1/X5,g(x)6/x question 2 find inverse, domain range and asymatotes of each function f(x)=3+e^4x can some one help me please been stuck on these for 2 days need help solving thank you 
algebra URGENT HELP
7x6 greater than or equal to 3x^2 reduced and written in interval notation 
algebra URGENT HELP
x+14/x8 ≥ 1 solve and write solution in interval notation 
algebra URGENT HELP
analyze the graph of the following function solve R(x)=x(x16)^2 /(x+11) solve the following inequality write solution in interval notation x+14/x8 less than or equal to 1 
algebra URGENT HELP
form a polynomial whose degree and zeros are given. don't expand a) degree 3,zeros,2,0,4 b)degree 4,zeros, 2 multiplicity 3,1 multiplicity 1 solutions a)p(x)= x(x+2)(x4) B)p(x) =(x+2)^3(x1) 
algebra URGENT HELP
A)p(x)= x(x+2)(x4) b)p(x)=(x+2)^3(x1) 
algebra
p(X)= X(X+2)(X4) P(X)=(X+2)^3(X1) 
algebra
solve A)p(x)= x(x+2)(x4) b)p(x)=(x+2)^3(x1) 
college algebra
given the following polynomial find the zero and multiply of each were the graph touches the x axis number of turning points fx =(x4)(x^225) 
college algebra
y=x^2+2x+8 
college algebra
Given the following quadratic equation, find;? a. the vertex b. the axis of symmetry c. the intercepts d. the domain e. the range f. the interval where the function is increasing, and g. the interval where the function is decreasing h. Graph the function. y= x^2+2x+8 
help college algebra
given the following piecewise function f(x) = x+1 for x<0 1 for 0<x<3 2x for x>3 find the domain find the range find the intercept d) is f continuous on it domain if not sate where f is dicontinous 
college algebra
given the function fx=x^3+x a) find the rate of change between the two stated values for x: 1 to 2 B)find the equation of a secant line containing the given points (1,f(1))and (2,f(2) 
algebra
what are the intercepts of y=2x+2 
math
solve for x 75=13^x 
Math
Rearrange this equation to isolate c. a=b((1/c)(1d)) 
college chem
Biphenyl, C12H10, is a nonvolatile, non ionizing solute that is soluble in benzene, C6H6. At 25 °C, the vapor pressure of pure benzene is 100.84 torr. What is the vapor pressure of a solution made from dissolving 14.3 g of biphenyl in 25.8 g of benzene? 
urgent urgent urgent
what is the chemical make up of actin and myocin 
urgent urgent urgent
A freshman studying medicine at an Ivy League College is a part of his class crew team and exercises regularly. After a particularly strenuous exercise session, he experiences severe cramps in his thighs and pain in his biceps. •Explain the chemical process that occurred ... 
urgent urgent urgent
A freshman studying medicine at an Ivy League College is a part of his class crew team and exercises regularly. After a particularly strenuous exercise session, he experiences severe cramps in his thighs and pain in his biceps. explain the process the muscle go through 
chemstry
the hiv virus that causes aids destroys the immune system in the body. classify the hiv virus and explain the statement 
chemistry urgent urgent
... the hiv virus that causes aids destroys the immune system in the body. classify the hiv virus and explain the statement. 
Math
Emily wants to make a rectangular model with a height of one connecting cube. She wants to make the model in exactly 2 different ways. How many connecting cubes could Emily use to make the model in only two ways 
chemstry
Classify six kinds of amino acids according to the functions that they serve in the human body, stating an example for each class. 
chemistry urgent urgent
thank you 
chemistry urgent urgent
Discuss, in detail, the role played by DNA and RNA in genetic diseases. What are the breakthroughs, if any, in the treatment/management of genetic diseases? 
chemistry urgent urgent
the managing director of a company on wall street thrives on a diet of fruit jam,bread,pasta,and coffee.she exercises intermittently.one day she desides to go to her primary healthcare provider for a check up the provider recommends that she takes the benedicts test assume ... 
chemistry
A freshman is currently enjoying the Arts Studio program she is pursuing at a wellknown university. In her free time, she likes to skate, take salsa dance lessons, and cook. She particularly enjoys pickling and decides to pickle olives over a leisurely weekend. According to ... 
chemistry urgent urgent
do compare the differentes 
chemistry urgent urgent
Analyze the properties of a sodium atom and a sodium ion. What are the differences in mass, stability, and reactivity that are caused due to the differences between the sodium atom and sodium ion? 
Chemistry: Dr. Bob, can you check my work?
The first one was correct! I just used the incorrect number of sig figs. Thank you so much! 
Chemistry: Dr. Bob, can you check my work?
Okay. I'll try both. 825mL  712= 113. You have to convert mL to L in order to use the PV = nRT correct? if so,113mL=.113L P(.1130) = 1.47 moles CO2 * .0821 * 303 K .1130P=36.57 P = 323.6 atm OR 82585.4 = 739.6 mL = .7396L .7369P=1.47(.0821)(303) .7369P=36.57 P=49.6atm 
Chemistry: Dr. Bob, can you check my work?
In the "Methode Champenoise," grape juice is fermented in a wine bottle to produce sparkling wine. The reaction is given below. C6H12O6(aq) 2 C2H5OH(aq) + 2 CO2(g) Fermentation of 712 mL grape juice (density = 1.0 g/cm3) is allowed to take place in a bottle with a ... 
Chemistry
I'm still not sure which volume to use though. would it be 825 mL, 825mL  85.4 mL, or 712 mL? 
Chemistry
Sorry, I made a mistake. 85.4 mL = .0854 L. .0854 L * .79 g/cm3 = .0675g. .0675/46(MM of C2H5OH) = .0147 moles ethanol. .0147 moles ethanol = .0147 moles CO2. 
Chemistry
I found the moles of CO2 and I got 1.47. 85.4 L ethanol * .79 g/cm3 = 67.5g ethanol. 67.5/(12+12+5+16+1)= 1.47 moles ethanol. 1.47 moles C2H5OH *(2 moles C2H5OH/ 2 moles CO2) = 1.47 moles CO2. What do I use for the volume? do I use the volume of the bottle, the volume of the ... 
Chemistry
In the "Methode Champenoise," grape juice is fermented in a wine bottle to produce sparkling wine. The reaction is given below. C6H12O6(aq) 2 C2H5OH(aq) + 2 CO2(g) Fermentation of 712 mL grape juice (density = 1.0 g/cm3) is allowed to take place in a bottle with a ... 
History
Can you give me an idea of what to write for a veteran card 
History
Write a thank you veteran card 
college algebra
given the following rational, find the horizontal asympotes the vertical asymptotes if any and the oblique asymptotes if any f(x)=x^2x2 over 2x^2x10 
college algebra
given the folowing quadratic equations find the vertex the axis of symmetry the intercept the domain the range the interval where the function is increasing andthe interval where the function is decreasing graph the function y=X^2+4x 
college algebra
given function f(X)=X^3+3x findthe rate of change between the two stated values for x:1 to 2 find the equation of a secant line (1,f(1)and(2,f(2)) 
college algebra
graph the following function using transformations, be sure to graph all of the stages on one grph, state the domain and range y= x^2 +12x