Monday

November 30, 2015
**Science, Astrenomey**

This is my theory, read well if you wish to know the truth: according to the big bang, there is a equal amount of anti-matter to the matter, BUT nearly all that matter is missing! In this theory there was NO anti-matter when the earth was made. anti-matter is made when ...
*Thursday, August 23, 2012 by The Curse Word Destroyer, age 11*

**writing**

i was advise not to take eng 093 just yet which is basic english and and the courses i take requires me to write papers. Please help me with learning the basics of english, like putting the commas, semi in its apprioate space. also grammar!
*Tuesday, August 21, 2012 by #####rena*

**Properties of the ceramic ball mill**

The structure of Ceramic Ball Mill: Ceramic Ball Mill is mainly composed of a driving device, a cylinder body device, feeding device, discharging device and an electrical control device.Ceramic Ball Mill load is large, the power consumption is large, so the ceramic ball mill ...
*Monday, August 20, 2012 by jiandan*

**writeteacher**

i was advise not to take eng 093 just yet which is basic english and and the courses i take requires me to write papers. Please help me with learning the basics of english, like putting the commas, semi in its apprioate space. also grammar!
*Monday, August 20, 2012 by @@@KEA*

**math**

Many states offer personalized license plates. California, for example, allows personalized plates with seven spaces for numerals or letters, or one of the following four symbols. What is the total number of license plates possible using this counting scheme? (Assume that each...
*Wednesday, August 15, 2012 by Anonymous*

**Physics**

A proposed interstellar space vehicle comprises an accommodation unit of mass 690 Tons at the front, separated by a light tube between the individual centres of mass, which is 43m. The amount of seperation is necessary to reduce levels (from the nuclear engine) at the ...
*Saturday, August 11, 2012 by Alex*

**physics**

An orbiting spacecraft is described not as a "zero-g" but rather as a "microgravity" environment for its occupants and for onboard experiments. Astronauts experience slight lurches due to the motions of equipment and other astronauts and due to venting of ...
*Friday, August 10, 2012 by Ben*

**physics 102**

What are the wavelengths of electromagnetic wave in free space that have the following frequencies? (a) 3.00 10^19 Hz pm (b) 7.50 10^9 Hz cm
*Thursday, August 9, 2012 by Matt Will*

**english**

please organize these into a paragraph ;astronaauts supposed to rest for eight hours, but too excited to rest ;astronauts easily hopped high because moon has less gravity than earth ;opened spaceship door 61/2 hours after landing ;brought back to earth some moon rocks and soil...
*Sunday, August 5, 2012 by Taylor*

**communications**

2.Which of the following is NOT a technique for emphasizing material in a résumé? A. Presenting it in vertical lists B. Including it as part of a lengthy paragraph C. Offsetting it with white space D. Positioning it at the top of a page 1.) I think it's "...
*Sunday, July 29, 2012 by Ron*

**Physics**

The Hubble Space Telescope (HST) has recorded evidence of a black hole at the center of the M87 galaxy. Using Doppler data, it's been measured that matter is orbiting the center of this galaxy at an orbital speed of 7.5x10 5 m/s, out at a radius of 5.7x10 17 m. Calculate ...
*Thursday, July 26, 2012 by Zac*

**english**

Redarding the difference between fiction and nonfiction, which statement is most accurate A.writers of non fiction have no need to express passionate opinion B.nonfiction writers are more often free to move about in time and space C.nonfiction writers are free to emblish the ...
*Wednesday, July 25, 2012 by Anonymous*

**algebra****

Consider the sample space S = {1, 2, 3, . . ., 10}. Let A = all odd numbers in S. Let B = all multiples of 5 in S. Compute P(B | A). Enter your answer as a fraction using the "/" and do not include spaces in your answer.
*Tuesday, July 24, 2012 by Anonymous*

**Integrated Math 1 (help please??:( )**

Consider the sample space S = {1, 2, 3, . . ., 10}. Let A = all odd numbers in S. Let B = all multiples of 3 in S. Compute P(B | A). Enter your answer as a fraction using the "/" and do not include spaces in your answer.
*Tuesday, July 24, 2012 by Tifini*

**physical**

Steel rails for a train track are laid in a region subject to extremes of temperature. The distance from one juncture to the next is 4.41 m, and the cross-sectional area of the rails is 60 cm2. If the rails touch each other without buckling at the maximum temperature, 60.0 &...
*Monday, July 23, 2012 by itufizik*

**Finite Math**

Let A,B be events in a sample space. you are given the following probabilities: P(A)=0.8, P(B|A)=0.3, P(B|A^c)=0.8 Find: 1) P(B) 2) P(A|B) 3) P(A^c|B^c)
*Monday, July 23, 2012 by Preet*

**statistics**

A manager for a firm that sells advertising space in magazines and periodicals is considering a number of new initiatives to recognize high-performing members of her sales force. Assume that the annual sales revenue for members of her sales force is normally distributed with a...
*Saturday, July 21, 2012 by heather*

**Algebra**

Paint Express charges $30 per gallon of paint plus $1.10 per square foot of wall space. Color Creations charges $24 per gallon of paint plus $1.20 per square foot of wall space. Robert estimates he will need four gallons of paint for the rooms he’d like painted. How much ...
*Wednesday, July 18, 2012 by Veronica*

**physics**

An electron moving to the right at 4.0% the speed of light enters a uniform electric field parallel to its direction of motion. If the electron is to be brought to rest in the space of 5.0 cm, determine what the strength of the field is.
*Tuesday, July 17, 2012 by Mercedes*

**English**

Very weird SAT "sentence completion" question The literal meaning of astronaut is "---" a) Space Jockey b) Cosmic navigator c) Star sailor d) Space pilot e) Sky pilot
*Monday, July 16, 2012 by Willie*

**Physics(Rotational Energy)**

Suppose three masses are arranged as shown, connected by a rodless mass. (2 kg)-------(6 kg)--------(4 kg) 2m 3m a) If this object is free to rotate in space, about what point will it spin? b) A small mass (m=0.1 kg) drops vertically onto the2 kg mass traveling 100 m/s and ...
*Monday, July 16, 2012 by ChristinaNguyen*

**Math**

A tree one hundred cubits high is distant from a well two hundred cubits; from this tree one monkey climbs dow the tree and goes to the well, but the other leaps in the air and descends by the hypotenuse from the high point of the leap, and both pass over an equal space. Find ...
*Sunday, July 15, 2012 by Lauren*

**physics**

Two astronauts, each having a mass of 89.0 kg, are connected by a 10.0 m rope of negligible mass. They are isolated in space, moving in circles around the point halfway between them at a speed of 5.60 m/s. Treating the astronauts as particles, calculate each of the following.
*Sunday, July 15, 2012 by Anonymous*

**probability**

3. A bag contains five different lightbulbs. The bulbs are the same size but each has a different wattage. If you select three bulbs at a random,how many different outcomes will be in the sample space if the bulbs are selected without replacement? I understand there is 5 ...
*Sunday, July 15, 2012 by bria*

**physics**

A cylinder with a radius of 15 km is built in space for use as a space station. This cylinder is rotating about its long axis to generate ‘artificial gravity’. When people walk on the inner surface of the spinning cylinder, the normal force between their feet and ...
*Thursday, July 12, 2012 by Jessica*

**math**

A storage area measures 15.6 feet by 10.2 feet by 8.5 feet. If it is 1/3 full, how many cubic feet of storage space remains (rounded to the nearest cubic foot)?
*Thursday, July 12, 2012 by lamedia*

**math**

A storage room measures 14.25 feet in length by 12.5 feet in width by 8.4 feet in height. It contains a box which is 2.5 feet in length, 5.2 feet in width and 1.5 feet in height . How many cubic feet of storage space are left in the room (rounded to the nearest cubic foot)?
*Thursday, July 12, 2012 by lamedia*

**elem math core**

A bag contains one each of red, blue, green, yellow and white marbles. Give the sample space for the following experiments. A) one marble is drawn at random B) one marble is drawn, but not replaced,and then a second marble is drawn.
*Wednesday, July 11, 2012 by jordan*

**Math**

A vending machine has marbles of 4 different colors: Red, blue, purple,and yellow. The marbles are well mixed. You drop a quarter into the machine and you get 2 random marbles. Write out the sample space for the experiment. The sample space should be N = 10.
*Wednesday, July 11, 2012 by Meredith*

**Principles of Management - Strategic Management**

please review my answers! 1. which of the following is an example of an internal stakeholder of an organization? A) distributors B) suppliers C) Unions D) Individual Workers It is: D) Individual Workers 2. Two drug companies agree to work together to pool their research and ...
*Tuesday, July 10, 2012 by Amanda*

**science**

two spheres carrying charge q are hanging from a same point of suspension with the help of threads of length 1 m in a space free from gravity . the distance between them is?
*Monday, July 9, 2012 by Juli*

**Physics**

You are explaining why astronauts feel weightless while orbiting in the space shuttle. Your friends respond that they thought gravity was just a lot weaker up there. Convince them and yourself that it isn't so by calculating the acceleration of gravity 248 km above the ...
*Sunday, July 8, 2012 by Dan *

**Physics**

Suppose the space shuttle is in orbit 430 km from the Earth's surface, and circles the Earth about once every 93.2 minutes. Find the centripetal acceleration of the space shuttle in its orbit. Express your answer in terms of g, the gravitational acceleration at the Earth&#...
*Sunday, July 8, 2012 by Dave*

**Chemistry - Correction**

I just wanted to be sure if my answers make any sense. Thank you; For the reaction of ammonia: N2(g) + 3H2(g) --> 2NH3(g) suppose equilibrium has been established. Explain how and why the position of equilibrium will shift in response to the following changes: (a) ...
*Tuesday, July 3, 2012 by Robert*

**Chemistry**

I just wanted to be sure if my answers make any sense. Thank you; For the reaction of ammonia: N2(g) + 3H2(g) --> 2NH3(g) suppose equilibrium has been established. Explain how and why the position of equilibrium will shift in response to the following changes: (a) ...
*Monday, July 2, 2012 by Robert*

**Probability**

You have a sample space of 2 events called A and B. From your experimental observations you determine the probability of A or B {i.e. P(A or B)} to be 71%. You also conclusively determine that the probability of A is 30% and the joint probability of both events occurring is 19...
*Saturday, June 30, 2012 by DLCS*

**geometry**

Jackson is creating a water garden surrounded by a triangular patch of grass. If the pond will take up the space indicated by the circle, how many square feet of sod will he need to complete the garden (use 3.14 for and round your answer up to the next foot)? the triangle is 6...
*Friday, June 29, 2012 by shanice*

**desktoping**

if you are at the end of a line and want to leave a blank line before beginning the next line press __________ 2 times A. Space bar B. Enter key C. Home key D: Tab key I got D. __________ is measured in words per minute A. Accuracy B. Level C. Margin D. Speed I got B
*Wednesday, June 27, 2012 by Ciara*

**science**

Three very small spheres of mass 3.00 kg, 5.00 kg, and 3.00 kg are located on a straight line in space away from everything else. The first one is at a point between the other two, 13.0 cm to the right of the second and 24.0 cm to the left of the third. Compute the net ...
*Wednesday, June 27, 2012 by Rachel*

**PHSC**

In a simulation on earth,an astronaut in his space suit climbs up a vertical ladder.On the moon,the same astronaut makes the same climb.In which case does the gravitational potential energy of the astronaut change by a greater amount?
*Tuesday, June 26, 2012 by brandy*

**phsc**

A satellite explodes in outer space, far from any other body,sending thousand of pieces in all direction.How does the linear momentum of the satellite before the explosion compare with the total linear momentum of all the pieces after the explosion ?
*Tuesday, June 26, 2012 by brandy*

**Geometry**

Jackson is creating a water garden surrounded by a triangular patch of grass. If the pond will take up the space indicated by the circle, how many square feet of sod will he need to complete the garden (use 3.14 for and round your answer up to the next foot)? There's a ...
*Wednesday, June 20, 2012 by Anonymous*

**Physics Gravity**

A projected space station consists of a circular tube that will rotate about its center (like a tubular bicycle tire) as shown in the figure . The circle formed by the tube has a diameter of about 1.1-km g = R w^2 = 9,8 m/s^2 R = 550 m How do I convert the answer with this ...
*Sunday, June 17, 2012 by Mike Joseph*

**Physics Gravity**

A projected space station consists of a circular tube that will rotate about its center (like a tubular bicycle tire) as shown in the figure . The circle formed by the tube has a diameter of about 1.1-km What must be the rotation speed (revolutions per day) if an effect equal ...
*Saturday, June 16, 2012 by Mike Joseph*

**math**

A pie plate has a diameter of 22 cm. How much counter space is needed to display 8 pies?
*Friday, June 15, 2012 by Randy*

**physics**

a spacecraft is traveling in space fa from any planets or stars. How much force is required to maintainthe spacecraft's speed?
*Wednesday, June 13, 2012 by Louis*

**Chemistry**

What is the concentration, in g/L, of a solution containing 0.65 mol HNO3 in 150 mL solution? Give your answer rounded to nearest whole number, followed by a space and the units.
*Wednesday, June 13, 2012 by Sonakshi Sinha*

**Chemistry**

What is the concentration, in mol L-1, of a solution containing 1.2 g of lithium carbonate in 100 mL solution? Give your answer as 2 sig fig, followed by a space and the units (remember the units given in a previous question).
*Wednesday, June 13, 2012 by Sameera Ready*

**Chemistry**

How many moles of lithium carbonate are contained in 400 mL of a lithium carbonate solution with a concentration of 0.015 mol L-1? Give your answer as two sig. figures, followed by a space and the units
*Wednesday, June 13, 2012 by Kareena Kapoor*

**Chemistry**

What volume of 0.01 mol L-1 Li2CO3 solution would contain 0.035 mol lithium carbonate? Give your answer as 2 sig fig (this is technically not correct), followed by a space then the units.
*Wednesday, June 13, 2012 by Deepika Padukone*

**Chemistry**

What is the concentration of a solution of lithium carbonate containing 0.01 mol in 750 mL of solution What volume of 0.01 mol L-1 Li2CO3 solution would contain 0.035 mol lithium carbonate? Give your answer as 2 sig fig (this is technically not correct), followed by a space ...
*Wednesday, June 13, 2012 by Preity Zinta*

**statistics**

A CBS/New York Times poll found that 350 out of 757 adults said they would travel to outer space in their lifetime, given the chance. Estimate the true proportion of adults who would like to travel to outer space with 95% confidence level.
*Wednesday, June 13, 2012 by smrey*

**physics**

A 58-kg astronaut inside a 9-m-long space capsule of mass 550 kg is floating weightlessly on one end of the capsule. He kicks off the wall at a velocity of 3.6 m/s toward the other end of the capsule. How long does it take the astronaut to reach the far wall?
*Tuesday, June 12, 2012 by lanre*

**physics**

A satellite with a mass of 260 kg approaches a large planet at a speed vi,1 = 13.1 km/s. The planet is moving at a speed vi,2 = 10.2 km/s in the opposite direction. The satellite partially orbits the planet and then moves away from the planet in a direction opposite to its ...
*Tuesday, June 12, 2012 by lanre*

**DeskToping**

If you press the ______ key , you will jump to the previous screen. A. Page Down B. Page Up C. Home D. End I got C. You should _______ insert a blank space before the percent symbol. A. always B. not C. occasionally D. NONE OF THE ABOVE I got B.
*Monday, June 11, 2012 by Sarah*

**chemistry**

Mercury(Hg) has a density of 13.5 g/cm cubed. How much space would 50.0 g of mercury occupy? Calculate the mass in grams, of a 3 cubic inch cube of aluminum(Al). The density of aluminum(Al) is 2.5 g/cm cubed. NOTE:(1inch cubed =16.4 cm cubed
*Saturday, June 9, 2012 by John*

**chemistry**

Mercury(Hg) has a density of 13.5 g/cm cubed. How much space would 50.0 g of mercury occupy?
*Saturday, June 9, 2012 by John*

**physics**

Explain how an object can orbit a planet & why astronauts float around in the orbiting space shuttle
*Thursday, June 7, 2012 by deresse*

**Fundemental DeskTop **

If you press the ______ key you will jump to the previous screen A. Page down B. Page up C. Home D. End I got B . You should ____ insert a blank space before the percent symbol A. Always B. Not C. Occasionally D. NONE OF THE ABOVE I got B .
*Wednesday, June 6, 2012 by Sarah*

**Physics**

An astronaut of mass 82.2 kg is 31.2 m far out in space, with both the space ship and the astronaut at rest with respect to each other. Without a thruster, the only way to return to the ship is to throw his 0.502 kg wrench directly away from the ship. If he throws the wrench ...
*Wednesday, June 6, 2012 by Christina Y.*

**linear programming**

Mountain Laurel Vineyards produces three kinds of wine Mountain Blanc, Mountain Red, and Mountain Blush. The company has 17 tons of grapes available to produce wine this season . A cask of Blanc requires 0.21 tons of grapes, a cask of Red requires 0.24 tons, and a cask of ...
*Wednesday, June 6, 2012 by uma*

**to ms.sue-project**

After reading Holes by Louis Sachar, you will complete the book reporting bingo assignment. You will select any five boxes in a row from the board, in any direction across, down, or diagonally, to create a bingo. Each assignment must: •Be neat •Be complete •Be ...
*Tuesday, June 5, 2012 by Celest*

**Art**

Here are the last sentences on the same theme. 1) This important feature makes power lines able to transport electric energy without any problem connected with dissipation of energy. They are useful in aerospace industry because they can keep a big amount of electric energy ...
*Monday, June 4, 2012 by John*

**English**

i not get what this poem mean it be a ballad but i not get what theme be do the guy girl be in strong bond? True Thomas lay on Huntlie bank; A marvel he did see And there he saw a ladye bright Come riding down by the Eildon Tree. Her skirt was o' the grass-green silk, Her ...
*Sunday, June 3, 2012 by Mohammad*

**Science/Physics**

Explain why a rapidly spinning gyroscope, mounted in a frame that allows it to rotate in any direction independently of the frame’s rotation, tends to maintain its axis pointed in the same direction in space. I just am not getting this!
*Sunday, June 3, 2012 by Elizabeth*

**Physics**

A rotating space station has radius 1270 m, measured from the center of rotation to the outer deck where the crew lives. What should the period of rotation be if the crew is to feel that they weigh one-half their Earth weight? I got 101.1 seconds... is this correct? Please help!
*Sunday, June 3, 2012 by Brandi*

**physics**

You are on Mars and would like to send a probe into space so that it does not fall back to the surface. What minimum launch speed do you need? (The mass of Mars is 6.42x10^23 kg and the radius of Mars is 3.40x10^6 m) km/s Please someone also help me on this.I really don't ...
*Saturday, June 2, 2012 by Akbar*

**math**

Three points P, Q and R are on a level ground. Q is 240m from P on a bearing of 230°. R is 120m to the east of P. (a) Using a scale of 1cm to represent 40m, draw a diagram to show the positions of P, Q and R in the space provided below. (b) Determine : (i) the distance of ...
*Saturday, June 2, 2012 by Anonymous*

**painting**

compare and contrast the representation of weight and space in the painting of The Good Shepherd in the Catacomb of Saints Pietro and Marcellino (Image 15-2) and the mosaic of Justinian and Attendants in Ravenna's Church of San Vitale (Image 15-5)
*Thursday, May 31, 2012 by Sha*

**Business English "Designing the page and ect" **

Please double check my answers for me. 1. The appearance of a document can do all of the following except: A. establish rapport with the audience. B. guide your readers' attention C. substititue the written text in the document. D. Build goodwill. answer: C. Substitute teh...
*Wednesday, May 30, 2012 by Amanda*

**college math**

Some people feel that the ideal temperature for an office space is 72.0F. What is the temperature in C? The formula I used is F= 9 x 72 + 32 = 648 + 32 Is this correct so far
*Tuesday, May 29, 2012 by Lourane*

**pre algebra answer check**

You are standing 400 feet from the base of the Space Needle in Seattle, Washington. Using a laser range finder, you measure the distance to the top of the Space Needle to be 725 feet. Find the height of the Space Needle to the nearest foot. I got 629 ft.
*Tuesday, May 29, 2012 by amy*

**Science**

Thank you very much for your help. I will check major grammar mistakes tomorrow morning. Can you please have a quick look at the second part and tell me which sentences need to be revised? 1) However, their most striking feature was that these cells were able to reproduce and ...
*Monday, May 28, 2012 by John*

**Science**

Suppose we allowed each person 1000m^3 of living space in a large building, with ceiling height 3 m. To the nearest order of magnitude, how many 1000m high buildings would have to be built to house the entire population of 8.5 x 10^14 people on the energy-limited Earth, if ...
*Friday, May 25, 2012 by Ann*

**Art**

Could you please check these sentences, Writeacher? Thank you. 1) A job seeker should make a short list of the job's requirements and should keep it in his mind during the interview. In this way he can bring in examples to demonstrate that he is the right person for the ...
*Thursday, May 24, 2012 by Jack*

**ALGEBRA**

A single card is selected from an ordinary deck of cards. The sample space is shown in the following figure. Find the following probabilities. (Enter the answers either as fractions or as decimals rounded to three places.) P(five of clubs) = Incorrect: Your answer is incorrect...
*Wednesday, May 23, 2012 by Mike*

**Foreign languages**

I urgenlty need you to check these sentences, please.Thank you. 1) A job seeker should make a short list of the job's requirements and should keep it in his mind during the interview. In this way he can bring in examples to demonstrate that he is the right person for the ...
*Wednesday, May 23, 2012 by Jack*

**Math**

2 part question 1) a cone shaped paper cup has a height of 7 inches and a diameter of 5 inches. What is the volume of the cone? Round answer to the nearest hundredth. 2) if we collect rainwater in the cup in question 1 until the waters depth is 6 inches, what percentage of the...
*Tuesday, May 22, 2012 by Rosie*

**Statistics**

A lottery uses 4 urns containing chips 0 to 9. One chip is selected at random from each urn. How many sample points are in the sample space?
*Tuesday, May 22, 2012 by Tammy*

**Geometry**

A rectangular pyramid fits exactly on top of a rectangular prism. Find the volume of the composite space figure if the prism has length 19 cm, width 2 cm, height 11 cm, and the pyramid has height 7 cm.
*Monday, May 21, 2012 by Lex*

**physics**

A cubical piece of heat-shield-tile from the space shuttle measures 0.18 m on a side and has a thermal conductivity of 0.065 J/(s·m·C°). The outer surface of the tile is heated to a temperature of 1050°C, while the inner surface is maintained at a ...
*Monday, May 21, 2012 by robert*

**related rates**

After blast-off, a space shuttle climbs vertically and a radar-tracking dish, located 1000 meters from the launch pad, follows the shuttle. How fast is the radar dish revolving 10 sec after blast-off if at that time the velocity of the shuttle is 100 m/sec and the shuttle is ...
*Sunday, May 20, 2012 by :)*

**Physics**

When the space shuttle (mass of the shuttle = 2 x10^6 kg) was at the outer limit of Earth's atmosphere (distance = 350 km above Earth's surface), astronauts measured the gravitational force from Earth to be equal to 1.7 x 10^7 newtons. Assuming that both Earth and the ...
*Sunday, May 20, 2012 by Leila*

**English**

Toss a coin. And if you get a head, move one space forward, and put a marker in the space. If you get a tail, move two spaces. Look at the word or picture on the space. By using it, make a sentence on the right side of the page. (Would you check the writing and correct errors...
*Saturday, May 19, 2012 by rfvv*

** analysis **

What is meant by the sample space for a random experiment?
*Thursday, May 17, 2012 by Kasey*

**Calculus / a bit of physics**

explain why a scalar equation of the line exists in 2-D space, but not in 3-D space.
*Thursday, May 17, 2012 by j*

**ALGEBRA**

Many states offer personalized license plates. California, for example, allows personalized plates with seven spaces for numerals or letters, or one of the following four symbols. What is the total number of license plates possible using this counting scheme? (Assume that each...
*Wednesday, May 16, 2012 by Monic*

**Microsoft Word**

Is is possible to do this? It a requirement by my teacher but I just can't seem to do it. " singled space text within questions and double space between your questions".- If I single space the text within the questions, won't that make it single space between...
*Tuesday, May 15, 2012 by Shadow*

**physics**

in 2005, the space probe Deep Impact launched a 30 kg projectile into Comet Tempel 1. Observing the collision helped scientists learn about the comet’s characteristics. The come is estimated to have a mass of 9.0 x 1013 kg. a. Assuming the estimated mass of the comet at ...
*Tuesday, May 15, 2012 by dreamygirl*

**Phizzics....**

n 2005, the space probe Deep Impact launched a 30 kg projectile into Comet Tempel 1. Observing the collision helped scientists learn about the comet’s characteristics. The come is estimated to have a mass of 9.0 x 1013 kg.
*Tuesday, May 15, 2012 by dreamygirl*

**Science**

1. An electric space heater draws 15.0 A from a 120 V source. It is operated, on average, for 5.0h (hours) each day. a) How much power does the heater use and b) At $.10 per kWh, what does it cost to operate the heater for 30 days? 2. Suppose each person in the United States ...
*Tuesday, May 15, 2012 by Carly*

**science**

how does the moon move through space ?
*Tuesday, May 15, 2012 by Remy W*

**science**

how does the moon move through space ?
*Tuesday, May 15, 2012 by martin*

**science**

If you watch a movie scene in which a loud explosion occurs in the space. What do you conclude about the accuracy of the scene?
*Monday, May 14, 2012 by raquel*

**Spheres, Locus (in space aka 3d)**

1) A "small circle" is a circle on a sphere that is NOT a "great circle". What is the locus of the centers of ALL small circles of a sphere having radius 1/2 that of the sphere? I think the answer is a plane? But I'm not sure. Please help me!
*Monday, May 14, 2012 by Billy*

**Science**

I have 5 minute presentation on any thing. I like talk about space travel or space exploration. I do not know where to find and other websites they have too much informtion. can you please give me any websites?
*Monday, May 14, 2012 by Jessie*

**math**

what is the locus of the midpoints of the line segments joining a given external point to all points of a plane? (Locus is set in space aka 3d)
*Sunday, May 13, 2012 by My Name Is Bob*

**physics**

Suppose we have Bob the astronaut sitting without a space suit in a spaceship full of air on a mission to Mars. Bob is very fond of balloons and is holding on to a nice, big, red helium balloon via a piece of string. Bob is sitting facing the front of the spaceship. Mission ...
*Friday, May 11, 2012 by Kay*

**Calculus**

explain why a scalar equation of the line exists in 2-D space, but not in 3-D space.
*Thursday, May 10, 2012 by J*

**Foreign languages**

Writeacher, can you check these statements, please? Thank you. 1) Is it possible to use the expression "lose the bus"? I know one should say "miss the bus" but I just wanted to know if "lose" is a mistake. 2) Things are getting better since the ...
*Thursday, May 10, 2012 by Mark*