Sunday

May 1, 2016
**physics**

At 300 K we see the electron concentration in the conduction band for pure (undoped) Si is 10^10/cm3. How many electrons per Si atom is this? You can use scientific notation, as in A.AAeB Si is diamond cubic with 8 Si atoms per unit cell and a lattice parameter of 0.543 nm.
*Saturday, December 21, 2013 by Henry III*

**physics**

In the process of electrolysis, electrical power is used to separate water into oxygen and hydrogen molecules via the reaction: H2O --> H2 + ½O2 This is very much like running a hydrogen fuel cell in reverse. We assume that only the activation potential for the ...
*Friday, December 20, 2013 by Arnold Smith*

**engineering**

In the process of electrolysis, electrical power is used to separate water into oxygen and hydrogen molecules via the reaction: H2O --> H2 + ½O2 This is very much like running a hydrogen fuel cell in reverse. We assume that only the activation potential for the ...
*Thursday, December 19, 2013 by Timothy Boons*

**physics**

1. Calculate the de Broglie wavelength in picometers (1 picometer =10^−12 meters) of an electron that has kinetic energy of 10 keV. The mass of an electron is 9.11 x 10^−31 kg 2. Winter is coming, so I want to make a 1500 W heating coil which will plug into a 120 V...
*Thursday, December 19, 2013 by Joshua Pams*

**Math**

A marching band was in a parade. The band members marched in 8 rows. There were 6 band members in each row. Explain how the fact that 5X6=30 can help you find 8X6. I need help with this question
*Tuesday, December 10, 2013 by James*

**Algebra 1 (Reiny or Kuai)**

1. The school band sells carnations on Valentine's Day for $2 each. They buy the carnations from a florist for $0.50 each, plus a $16 delivery charge. a. Write a system of equations to describe the situation. A: y = 2x; y = 0.50x + 16. b. Graph the system. What does the ...
*Monday, December 9, 2013 by Please, help me!*

**Algebra 1 (Reiny or Kuai)**

1. Which x-values should I choose to graph these equations (y = x; y = -x + 6) so that they intersect? 2. The school band sells carnations on Valentine's Day for $2 each. They buy the carnations from a florist for $0.50 each, plus a $16 delivery charge. a. Write a system ...
*Monday, December 9, 2013 by Please, help me!*

**chemistry**

You have purifiedLDH using affinity chromatography. Using the bradford assay you determined the total protein concentration of the column fraction to be 10 mg/ml in a final volume of 2.4 ml. You diluted some of your column fraction to 1 mg/ml using SDS Page sample loading ...
*Monday, December 9, 2013 by lacy*

**biochemistry**

You have purifiedLDH using affinity chromatography. Using the bradford assay you determined the total protein concentration of the column fraction to be 10 mg/ml in a final volume of 2.4 ml. You diluted some of your column fraction to 1 mg/ml using SDS Page sample loading ...
*Monday, December 9, 2013 by lacy*

**Homework Help: Solar Energy Please HelpASAP**

d) In the up-convertor 1, two photons are converted into one photon with 100% conversion efficiency. If all photons with energy above that of the band gap of a-SiC:H are absorbed in the a-SiC:H layer, in which spectral range can the photons be up-converted so that they ...
*Thursday, December 5, 2013 by Johnny*

**Solar energy please help**

1-Consider an organic solar cell consisting of a TiO2 semiconductor with an ionization energy 7.8eV and a polymer with an electron affinity 3.4eV. Which of the followning band diagrams corresponds to the organic solar cell. The band gap of TiO2 is 3.5eV. (a) (b) 2-What is the ...
*Friday, November 29, 2013 by UNO*

**Solar Energy please help**

Solar simulators are used to study the performance of solar cells in the lab. In the figure below (left picture), the spectral power density of a solar simulator is shown with the blue line. The spectral power density of this solar simulator is given by: P(λ)=7.5∗...
*Friday, November 29, 2013 by UNO*

**math**

60 percent of the students in a marching band are girls. There are 30 girls in the marching band. How many students are there altogether?
*Sunday, November 24, 2013 by Rylee*

**language arts**

We saw the months of wicked weather, As day to painful night did turn, Waiting, huddled close together For the frozen sun’s return. Our nights were almost endless torture. Our food was gone. Our fuel was low. We came in search of grand adventure But ended trembling in the...
*Friday, November 22, 2013 by Kelsey*

**Comm 215**

Do these look correct? Part I: True or False 1. The following word group is a FRAGMENT: That movie, one of my favorites. _X_True __False 2. The following word group is a FRAGMENT: The local baseball team, needing a good pitcher most of all. _X_True __False 3. The following ...
*Tuesday, November 19, 2013 by John*

**biology**

Given three restriction enzymes, cuts and base pairs on the plasmid map. How do you apply this information to a autoradiogram of sequencing gel? Also, include the band locations.
*Thursday, November 14, 2013 by Jets*

**math**

At the half time show, a marching band marched in formation. The lead drummer started at a point with coordinates (-2,-5) and moved 3 steps up and 1 step right. a: write a rule to describe a translation b: what were the coordinates of the drummers final position
*Tuesday, November 12, 2013 by victoria*

**Pre Alg (Check my work?)**

1.) In which Quadrant is the point (x,y) located if x is negative and y is positive? II III IV (MY ANSWER) I 2.) Point A(5,-10) is reflected over the Y axis. Write the coordinates of A'. (-8,-10) (8,10) (8,-10) MY CHOICE (-8,10) 3.) At the half-tame show, a marching band ...
*Monday, November 11, 2013 by AudioslavedCobain182*

**history**

Before 1910, the most popular form of public entertainment was A. viewing motion pictures. B. ballroom dancing. C. baseball. D. band concerts. Is it C?
*Monday, November 11, 2013 by pi*

**Can someone please help me with this history!!!!!!**

Multiple Choice 1. Which of the following statements describes the most common experience of Native Americans after encountering Europeans for the first time? (1 point) Native Americans thought the settlers had nothing to offer them in trade or knowledge. Native Americans ...
*Sunday, November 3, 2013 by josh *

**Engineering**

At 300 K we see the electron concentration in the conduction band for pure (undoped) Si is 1010/cm3. How many electrons per Si atom is this? You can use scientific notation, as in A.AAeB Si is diamond cubic with 8 Si atoms per unit cell and a lattice parameter of 0.543 nm.
*Friday, November 1, 2013 by Solar Solar Cells, Fuel Cells and Batteries*

**english**

why is kpop so popular, especially the kpop band SHINee?
*Wednesday, October 30, 2013 by SHINee*

**English**

We heard tommy's loud drumming clearly despite the _______ of the elementary school band practice. A. Esprit B. Concordance C. Animadversion
*Monday, October 28, 2013 by Charles*

**English Compound Subjects**

Can someone please check my answers? *Cross out any prepositional phrases. Underline the subject once and the verb/verb phrase twice. 1. Doug and his new bride vacationed in Florida. (subject- Doug, bride verb- vacationed prepositional phrase- in Florida) 2. During the fair, a...
*Sunday, October 27, 2013 by Jane*

**Solar Energy Please Help**

Figure 1 shows a simplication of the AM1.5 solar spectrum at 1000W/m2. The spectrum is divided in three spectral ranges: A for 0nm<λ<620nm B for 620nm<λ<1240nm C for 1240nm<λ<1860nm The photon flux in each spectral range is also shown in the ...
*Saturday, October 26, 2013 by Anonymous*

**Physics **

One can work out by either lifting weights or using a tension band, which is like a big rubber band. If we model the rubber band as a big spring with spring constant 400 N/M how far in meters must I stretch the the band so it applies a force equivalent to the gravitational ...
*Monday, October 21, 2013 by Saiba*

**chemistry**

An electron falls from the conduction band of silicon (Si) to the valence band. The band gap of Si is 1.1 eV. What is the wavelength of the photon emitted by this process? Give your answer in nm.
*Wednesday, October 16, 2013 by kunal*

**chemistry**

The band gap of indium gallium arsenide varies based on the concentration of gallium in the material. A sample of InGaAs absorbs light with a wavelength less than 1.37 microns. What is the band gap of the InGaAs sample in eV
*Tuesday, October 8, 2013 by heyyou*

**chemistry**

The band gap of indium gallium arsenide varies based on the concentration of gallium in the material. A sample of InGaAs absorbs light with a wavelength less than 1.37 microns. What is the band gap of the InGaA sample in eV
*Tuesday, October 8, 2013 by heyyou*

**chemistry**

The band gap of indium gallium arsenide varies based on the concentration of gallium in the material. A sample of InGaAs absorbs light with a wavelength less than 1.37 microns. What is the band gap of the InGaA sample in eV
*Tuesday, October 8, 2013 by heyyou*

**English**

1. Sam is sitting down in a chair and playing drum. 2. Sam is sitting down in a chair and playing the drum. 3. Sam is sitting down in a chair and playing a drum. 4. Sam is sitting down in a chair and playing drums. 5. Sam is sitting down in a chair and playing the drums. (...
*Friday, October 4, 2013 by rfvv*

**Math**

Eight students tried out for the band or chorus. Five students tried out for band, and the rest tried out for the chorus. How mwny students tried out for the chorus?
*Thursday, October 3, 2013 by Raquel*

**Math**

A band played 3 concerts and earned a total if 321.00. The band earned about the same about the same about the same amount for each concert. Estimate how much the band earned each night
*Thursday, October 3, 2013 by Anonymous*

**Math**

A marching band has 36 members. What arrangement could they use in order to have equal numbers of players in each row?
*Tuesday, October 1, 2013 by Anonymous*

**Anatomy**

Which statement is correct regarding thick filament structure? All the myosin molecules are arranged with their tails pointing away from the M line. The free myosin head has three globular protein subunits. It consists of a core of titin, forming a strand that continues across...
*Wednesday, September 25, 2013 by Amy*

**math**

Members of the West High School Band were hard at work practicing for the annual Homecoming Parade. First, they tried marching in rows of 12, but himself to bring up the rear left Andrew. Then the director told the band members to march in columns of eight, but Andrew was ...
*Wednesday, August 21, 2013 by joe*

**English to Writeacher**

Writeacher, please help me with my thesis!!:'( its due tmw...i dont know wat theme i should do and wat my arguments would be... here is the plot: Gandalf tricks Bilbo into hosting a party for Thorin and his band of dwarves, who sing of reclaiming the Lonely Mountain and ...
*Sunday, July 21, 2013 by Kristen*

**electronics technician**

1. A circuit contains a 10 F capacitor and a 30 F capacitor connected in parallel. What is the total capacitance of the circuit? A. 7.5 F C. 40 F B. 20 F D. 47 F 2. What is the time constant of a 2 mH inductor and a 200 resistor connected in series...
*Tuesday, June 18, 2013 by mompati*

**Physics**

A rubber ball is attached to a paddle by a rubber band. The ball is initially moving away from the paddle with a speed of 4.5 m/s. After 0.30 s, the ball is moving toward the paddle with a speed of 2.0 m/s. What is the average acceleration of the ball during that 0.30 s?
*Tuesday, May 21, 2013 by Anonymous*

**Managerial Economics**

Suppose that Neptune Music has the copyright to the latest CD of the heavy Iron Band. The market demand curve for the CD is Q=800-100p, where Q represents quantity demanded in thousands and p represents the price in dollars. Production requires a fixed cost of $100,000 and a ...
*Tuesday, May 21, 2013 by Jay*

**Math**

Ashely's mother will make 4 pineapple fruitcakes for a bake sale to raise money for the school band.If 25 ounces of crushed pineapple are divided equally into 4 parts, how much pineapple will there be for each fruitcake?
*Thursday, May 9, 2013 by Adaija*

**Soc Stu 9**

A union is a group of worker who band together to have a better chance to obtain higher pay and better working conditions. Using this definition of a union, what are some examples of the first Unions formed? I search all over the internet, and it's not in the book... I ...
*Wednesday, May 8, 2013 by Bridgett*

**Physics help**

You are watching a marching band practice outdoors. Near you are two trumpet players, one marching directly towards you and one away from you at the same speed. Each trumpet player is playing an A (440 Hz) and you hear a beat between the two sounds at a frequency of 2 Hz. How ...
*Wednesday, May 8, 2013 by Mathslover Please help*

**physics**

You are watching a marching band practice outdoors. Near you are two trumpet players, one marching directly towards you and one away from you at the same speed. Each trumpet player is playing an A (440 Hz) and you hear a beat between the two sounds at a frequency of 2 Hz. How ...
*Monday, May 6, 2013 by dfghndfghncbfv*

**Physics**

You are watching a marching band practice outdoors. Near you are two trumpet players, one marching directly towards you and one away from you at the same speed. Each trumpet player is playing an A (440 Hz) and you hear a beat between the two sounds at a frequency of 2 Hz. How ...
*Monday, May 6, 2013 by Mathslover Please help*

**math**

If twenty percent of the students play in the band and the band has forty members, how many students are there? Please help me
*Thursday, May 2, 2013 by Anonymous*

**algebra1**

juan's band produced a number of CDs to sell at a gig.the batch of CDs cost $170.00 to make and each CD was sold for $2.50 more than it cost to produce.juan gave 2 CDs to his friends,but sold the rest for a total of $198.00.How many CDs did juan produce?
*Saturday, April 27, 2013 by math lover*

**math for Ms. Sue**

The fifth grade marching band includes boys and girls. There are 28 boys in the marching band. The 28 boys are 7/10 of the students in the marching band. a. What fraction of the students n the marching band are girls? b. What is the total number of students in the marching ...
*Thursday, April 25, 2013 by Anonymous*

**Maths**

the figure below shows 3 similar circles that just touch one another.A,Band C are the centres of the circles.If the perimeter of the triangle ABC is 42cm, what is the total area of the unshaded part of the 3 circles. (take pie = 22/7)
*Wednesday, April 24, 2013 by Jeannie*

**world history**

A zimbabwe was a A. tribal leader. B. band of warriors. C. trade route though the desert. D. fortified administration center. Answer:b Incorrect Reference: PAGE 377 3. In his famous sermon of 1095, Pope Urban II saw Christian Europe as A. comprising all of Europe, which he ...
*Tuesday, April 16, 2013 by Anonymous*

**Reiny: Set Theory**

School counselor posted the following data after having had 150 students sign up for electives: Art - 65 students Band - 70 students Theatre - 50 students Not all students signed up for an elective.Show the data using Venn Diagrams. Shown with problem: three intersecting ...
*Wednesday, April 10, 2013 by Rosemary*

**7th grade math**

There are 150 students in 7th grade. After signing up for electives for next year, the counselor posted the following data: Art - 65 students Band - 70 students Theatre - 50 students Not all students signed up for an elective. Display this data using Venn Diagrams. I do not ...
*Saturday, April 6, 2013 by Renee*

**grade 6 honors math**

Of 150 sixth graders choosing electives for next year, 50 signed up for theater, 65 signed up for art and 70 signed up for band. Some students did not choose an elective. Represent this information using Venn Diagrams.
*Friday, April 5, 2013 by Jake*

**math**

It is noon. A secret agent is driving a jeep through the desert in the tiny principality of Alta Loma. He is 32km from the nearest point on a straight, paved road. Down the road 16km is a power plant in which a band of international terrorists has placed a time bomb set to ...
*Wednesday, April 3, 2013 by lucy*

**math: Algebra**

Three cylindrical tubes with with a 12 in diameter are strapped together by a plastic band. How long is the band?Suppose that four of the same tubes are strapped together with a snugly fitting plastic band how long is the band?
*Monday, April 1, 2013 by John *

**Math**

Mr. Green teaches band, choir, and math. This year, he has 57 students that take at least one of his classes. He teaches band to 25 students. There are 48 students who take either band or choir or both. There are 9 students who take both math and choir with Mr. Green. Use the ...
*Wednesday, March 27, 2013 by Unknown*

**math help please**

19. Mr. Green teaches band, choir, and math. This year, he has 57 students that take at least one of his classes. He teaches band to 25 students. There are 48 students who take either band or choir or both. There are 9 students who take both math and choir with Mr. Green. Use ...
*Tuesday, March 26, 2013 by Delilah*

**Physics **

A 9.6-m-long elastic band is used to launch a toy glider. Once stretched to a length of 38 m, the band releases 1.7 J of elastic potential energy when you let it contract 0.071 m. What forward force is the band exerting on the toy glider?
*Monday, March 25, 2013 by *

**Physics**

A 9.6-m-long elastic band is used to launch a toy glider. Once stretched to a length of 38 m, the band releases 1.7 J of elastic potential energy when you let it contract 0.071 m. What forward force is the band exerting on the toy glider?
*Monday, March 25, 2013 by *

**Math**

instruments played in a band include a piano drum guitar and saxophone.dave does not use his mouth to play his instrument. ted and lindas instruments have strings. dave, sue and linda carry their instruments.who plays each instrument?
*Tuesday, March 19, 2013 by Gio*

**Cultural Anthropology**

In a band society, who would most likely be responsible for punishing a murderer
*Monday, March 18, 2013 by Anna*

**artist**

Is it possible for a band or artist to make topical or political commentary in a song today while focusing on turning a profit?
*Thursday, March 14, 2013 by ashley*

**Math**

if a rubber band can be stretched to a circular shape that has a radius of 3.4 inches. how many 1.3-mm diameter toothpicks could of fit within it? (1 inch = 25.4 mm)
*Thursday, March 14, 2013 by Joshua baez*

**math**

There are 19 boys and 19 girls in the school pep band. If Trey randomly selects a member of the pep band to interview for the school newspaper, what is the probability that he will select a girl?
*Wednesday, March 13, 2013 by someone help me!*

**Physics**

A very long cylindrical capacitor consists of two thin hollow conducting cylinders with the same axis of symmetry. The inner cylinder has a radius a, the outer one has a radius b. You may ignore end effects. (a) Fig. 1 (b) Fig. 2 (a) What is the capacitance per unit length? ...
*Tuesday, March 12, 2013 by P*

**Algebra**

Mr. Green teaches band, choir, and math. This year, he has 57 students that take at least one of his classes. He teaches band to 25 students. There are 48 students who take either band or choir or both. There are 9 students who take both math and choir with Mr. Green. Use the ...
*Tuesday, March 12, 2013 by Cassie*

**physics**

A rubber band has a"spring constant" of 45 N/m. When the rubber band is pulled by a force of 9.8 N , how far will it stretch and what is potential energy?
*Sunday, March 10, 2013 by ryan*

**Math for Ms. Sue please last questions**

2. In a school of 464 students, 89 students are in the band, 215 students are on sports teams, and 31 students participate in both activities. How many students are involved in neither band nor sports? (1 point) 160 students 191 students 249 students 433 students 3. In a ...
*Friday, March 8, 2013 by Delilah*

**English**

Correct the word in () in each sentence below so that the subject and verb are in agreement 1.We (sees) the Golden Gate Bridge. see 2.(Bird) fly south for the winter. Birds 3.The bed (sit) below the window. sits 4.(They) adds the numbers on a calculator. She 6.I (enters) from ...
*Wednesday, March 6, 2013 by Jerald*

**Math**

A rock band has 5 members, and 2/5 of the members play string instruments. Also, 0.4 of the members sing. Does the band have the same number of string instrument players as singers. I think no. Am i correct? Please explain it.
*Wednesday, March 6, 2013 by Dan*

**Algebra**

Two of the top-grossing concert tours were by a jazz band and a rock band. Together the two tours visited 178 cities. The jazz band visited 92 cities more than the rock band. How many cities did each group visit?
*Tuesday, March 5, 2013 by Jon*

**Chemistry**

1) Determine the Kc for the following experimental conditions: compound A+compound B --> Compund D Compound: A B M 0.003 0.0023 Volume used: 5 mL 8 mL Total volume = 25 mL, using graph 2 and a %T of 24 for compund D molecular weight compund D = 535 g/mol 2) Determine Kc for...
*Monday, March 4, 2013 by Anonymous*

**science**

Two students play in a drumb band. Explain how the students make sounds on the drums. Then explain how one student can make a soft sound while the other student makes a loud sound
*Thursday, February 28, 2013 by Ms.Vargas*

**Science!! please help me could you write it to me **

Two students play in a drumb band. Explain how the students make sounds on the drums. Then explain how one student can make a soft sound while the other student makes a loud sound
*Thursday, February 28, 2013 by Ms.Vargas*

**Spanish: Please Help**

Please help. Thank You Which is the best answer for this question? ¿Cuántos años tiene Jaime? A.) Tienes quince años. B.) Tengo quince años. C.) Tiene quince años. 22. Las Mañanitas is A.) a special cake eaten at birthday ...
*Wednesday, February 27, 2013 by sarah*

**Algebra**

In a school of 464 students, 89 students are in the band, 215 students are on sports teams, and 31 students participate in both activities. How many students are involved in neither band nor sports? A.160 students B.191 students C.249 students D.433 students I think it is A...?
*Wednesday, February 20, 2013 by Cassie*

**physics**

what is the frequency of a citizen's band (CB) radio which has a wavelength of 11.5 meters ?
*Tuesday, February 12, 2013 by Ayawari Promise +2347068654055*

**math**

There are a total of 50 students in the Englewood band. 23 of them are boys. Let (g) represent the number of girls in the band. Which equation shows the number of girls in band? a. 50+23=g b. gx23=50 c. g-23=50 d. 50-23=g my answer is B. Is this correct?
*Sunday, February 10, 2013 by vera*

**math**

Six hundred people came to the band concert that was held on the school's athletic field. half of the people sat in the bleachers. one third of the people sat in chairs on the track. the rest of the people sat on the grass. How many sat on the grass? In chairs? In the ...
*Thursday, January 31, 2013 by Anonymous*

**floral design**

One of your friends who works at a local public TV station knows that you wish to break into event-floral designing. She attended a party last week for which you had created an amazing set piece that surrounded a small dance floor. Impressed with your work, she asks you to ...
*Thursday, January 24, 2013 by Jamie *

**English**

Read the following sentences. Then rewrite them so that they are simple sentences. You will need to leave out words to make the sentences simple 1.The snacks and drinks that Mom put on the counter disappeared quickly. The snacks and drinks disappeared quickly. 2.Even though it...
*Tuesday, January 22, 2013 by Jerald*

**math**

Members of the band are required to practice twenty-five minutes every night. About how many hours does a band member practice weekly?
*Thursday, January 17, 2013 by Anonymous*

**3rd grade math**

Two thirds of the musicians in a 16-piece band are girls. the 16 musicians include 12 brass players. what fraction of the band plays brass instrument.
*Wednesday, January 16, 2013 by mythreyee*

**math. **

A band poster that measures 90 cm by 40 cm is reduced by a scale factor of 1/6 so it can fit on a postcard. a) What are the dimensions of the postcard image? b) By what scale factor, to the nearest hundredth, was the area of the poster decreased in the reduction process? ...
*Tuesday, January 15, 2013 by jen*

**English**

Robin Hood's faithful band of merry men were not only (crotchety jovial) companions but brave fighters as well jovial? Her mind is so (impassable nimble) that she always seems to be one step ahead of us in any matter discussion nimble? The self styled tough guy (cringed ...
*Tuesday, January 15, 2013 by Jerald*

**math**

A band poster that measures 90 cm by 40 cm is reduced by a scale factor of 1/6 so it can fit on a postcard. a) What are the dimensions of the postcard image? b) By what scale factor, to the nearest hundredth, was the area of the poster decreased in the reduction process?
*Tuesday, January 15, 2013 by jenny*

**Anthroplpogy**

Political integration is common in chiefdoms. common in band societies. common in tribal societies. rare in commercial societies.
*Sunday, January 13, 2013 by Anonymous*

**Chemistry**

xplain why the value of the band gap energy, Eg, decreases in the following homologous series: Cdiamond=5.4 eV; Si=1.1 eV; Ge=0.72eV; Sn=0.08 eV. As we move down the group, bond strength increases. As the strength increases, materials become more metallic in nature, since ...
*Friday, January 11, 2013 by Ankur*

**Chemistry**

Which is the higher density of polyethylene, linear or branched? Select the choice with the best accompanying explanation. Linear polyethylene is the higher density form, as the chains are able to pack better and partially crystallize, resulting in better packing and higher ...
*Friday, January 11, 2013 by c*

**math**

the band uses 1 3/4 yrds of blue fabric and 3/8 yard of gold fabric to make a banner how many yards of fabric do they need to make 5 banners
*Wednesday, January 9, 2013 by Anonymous*

**Language Arts**

Scott’s Good-bye We saw the months of wicked weather, As day to painful night did turn, Waiting, huddled close together For the frozen sun’s return. Our nights were almost endless torture. Our food was gone. Our fuel was low. We came in search of grand adventure But ...
*Friday, December 21, 2012 by Eric*

**math**

350 students voted. 30% of them voted to add Band to the school. How many students voted fot the band. The answer is 105 students voted for the Band to be added to the school. Is this correct.
*Tuesday, December 18, 2012 by Haven*

**Math Algebra**

5. At the half-time show, a marching band marched in formation. The lead drummer started at a point with coordinates (–4, –7) and moved 4 steps up and 2 steps left. a. Write a rule to describe the translation. I think it is (x,y)-->(x+2,y+4)is this right?
*Sunday, December 16, 2012 by Deborah*

**chemistry**

The glass panels of a sky roof need to be coated in order to screen out ultraviolet radiation (10-400 nm wavelength) but without color distortion in the visible spectrum. Candidate coating materials are gallium nitride (GaN) with a band gap,Eg, of 3.2 eV, or gallium arsenide (...
*Sunday, December 16, 2012 by meshy*

**chemistry**

Cadmium telluride (CdTe) is a semiconductor witha band gap, Eg, of 1.45 eV. Calculate the value of the absorption edge of this material. Express your answer in meters.
*Sunday, December 16, 2012 by cutie*

**Physics**

A rubber ball is attached to a paddle by a rubber band. The ball is initially moving away from the paddle with a speed of 4.0 m/s. After 0.25 s, the ball is moving toward the paddle with a speed of 3.0 m/s. What is the average acceleration of the ball during that 0.25 s? Give ...
*Sunday, December 16, 2012 by Ann*

**ENGLISH 9 BIOGRAPHY**

we are doing a biography on our favourite singer or singers, and i luv justin bieber and one direction. My first choice is one direction since i really love their music. but then the problem is that i will have to do 5 biographys since their are 5 people in one direction. I ...
*Saturday, December 15, 2012 by Jules*

**chemistry**

(a) Cadmium telluride (CdTe) is a semiconductor witha band gap, Eg, of 1.45 eV. Calculate the value of the absorption edge of this material. Express your answer in meters.
*Friday, December 14, 2012 by student*

**chemistry**

(a) Cadmium telluride (CdTe) is a semiconductor witha band gap, Eg, of 1.45 eV. Calculate the value of the absorption edge of this material. Express your answer in meters.
*Friday, December 14, 2012 by lena*

**chemistry**

The glass panels of a sky roof need to be coated in order to screen out ultraviolet radiation (10-400 nm wavelength) but without color distortion in the visible spectrum. Candidate coating materials are gallium nitride (GaN) with a band gap,Eg, of 3.2 eV, or gallium arsenide (...
*Friday, December 14, 2012 by Anonymous*