Thursday

July 31, 2014

July 31, 2014

Total # Posts: 143

**Space Exploration**

Give two reasons why observatories are still being built on Earth instead of launching more space telescopes? I I'm assuming one reason is the cost but can't find another reason .

**Space Exploration**

List three subsystems of a SARSAT satellite and tell what the function of eCh subsystem is. Please help I can't seem to find them.

**Geometry **

Sandy decides to try golfing. She stands on the outer edge of a circular putting green. In the very center of this putting green is the hole;it is 8m away from where she is standing. Sandy is inexperienced. She hits the ball incorrectly and it veers directly to her left and tr...

**Circle geometry**

The endpoints of the arms of an inscribed angle are the endpoints of a diameter. What is the measure of the inscribed angle? How do you know? Please help and please explain how I would draw a diagram of thus. Think you for your help!

**Astrology**

Why is it helpful to use the Celestial Sphere to find the position of objects in the night sky. Please help!, Thank you.

**Circle geometry**

Please help Explain how I figure this out. A circle has diameter 70cm. A chord in the circle is 50cm long. How far is the chord from the center of the circle? I have been stuck on this for days. I appreciate any help. Thank you!!

**Circle Geometry**

A wheel has radius 30 cm.It rolls along the ground toward a tack that is 58cm from the point where the wheel currently touches the ground. What is the distance between the tack and the closest point on the circumference of the wheel! I don't understand thus it all! Please ...

**Physics**

Why is using mirrors to generate electricity not a common practice?

**Physics**

A high efficiency natural gas furnace is 92% efficient. How many joules of output energy will 750kJ of input fuel provide? Please help! Thank you.

**Physics**

Ken has five 200W security lights on outside of home. How much energy do the security lights use in 8 hrs? If the cost of electricity is 8 cents per kWh,what is the cost of operating the security lights ? Please help I'm not sure which formula to use?

**Physics**

Does the solar powered calculator work when there is no bright light falling on the solar panel? Explain. I think it does but I don't know why please help explain this. Thank you

**Physics**

In a series circuit, the power source is 9-volt battery and three resistors. R1=7ohm R2=9ohm R3=2ohm What is the total resistance in this series circuit? What is the current? Please help I don't understand this!, Thank you

**Science**

Does a solar powered calculator work when there is no bright light falling on the solar panel? Explain

**Science**

What is a harmful effect of electrical resistance?

**Science**

What would happen if you moved the bar magnets further away from the armature when the St.Louis motor was running? Please help! I have been searching for r The answer for days and can't find it anywhere Thank you

**Science**

Why are generators not allowed in Niagara Falls? I am assuming that it has something to do with environment but I can't find the exact answer anywhere ?

**Science**

What three things can be done to increase the speed and power of a St.Louis electric motor?

**Science**

What would happen to an electric motor if the direction of the electric current in the armature did not change directions? Explain. I have read my textbook and googled it and I dint understand what would happen. Please help. Thank you

**Math**

Please help me with this!! The actual length of the picnic table is 180cm with legs 60cm. What is the scale factor for this diagram?

**Math**

Please Help!!, The dimensions of a photo of a mountain bike are 15cm by 12cm. An enlargement is to be made for a poster with dimensions 4.0m by 3.2m. What is the scale factor of the poster to the nearest tenth?

**Math**

Please help! 1.3-2.5x<or equal to -1.2x-0.52 The answer is x>or equal to 1.3 I have been on this for hours and can't figure it out Thank you

**Math**

Please Help!!!! I don't understand this at all. -(5f/6)-2/3>4/3 The neg sign is beside 5f/6

**Math**

Please Help!!!!!!! 1/2+4/7p>13/10 The p is beside 4/7. I have been stuck on this all morning any help and how it was solved would be appreciated. Thanks for your time and help.

**Math**

I have a triangle with one side 2y^2-3, a side with 2y^2+y+5, and the other side y^2+y+5. I had to write expression and simplify. This is what I got: (2y^2-3)+(y^2+y+5)+(2y^2+y+5) =5y^2+2y+7 I now have to determine the perimeter if y=3cm. I don't know how to do thus part p...

**Math**

The difference between two polynomials is (5x+3).One of the two polynomials is (4x+1-3x^2). What is the other polynomial? Please help! Thank you

**Science**

When would you want to have a corrosive reaction? I can find when you wouldn't want to have one but not when you wouldn't. Please help!! Thank you

**Science**

Citric acid has the formula C3H3OH(COOH)3. How many atoms of carbon,hydrogen and oxygen are in each molecule? Please help I don't understand this!! Thank you

**Science**

Please help I don't understand this! If the following compound is combined, how many if each would be needed to make electrically neutral compound? Fe(3+) &Cl(1-)

**Math**

(1/2)+3/5 /[9/10-(-3/5)]= I got 1.5 is this correct? If not could you please show me how to do this? If Steve answers thank you so much for all your help you are awesome:))

**Math**

Please help explain how to get answer! -8.6*14.6-5.3/[(-19.4)-8.6]/(-2.9)*6.3-(-9.5)

**Math**

(-1/2)+3/5/[9/10-(3/5)] I got 1/15 is this correct? I don't think so please help and explain how you did this :)

**Science**

Please help !!! A student wanted to determine the density of an object made of an unknown substance. She found the mass of the object was 335g. Then she did water displacement to determine the objects volume. The initial volume of the water was 50.0 mL. With the object submerg...

**Math**

Please help with this!!! 3/8-9/4[(-5/4)+(-1/10)] I cannot figure this out.

**Science**

In an experiment to find out how the proportion of cement in a concrete mixture affects the products strenghth what would be two controlled variables and what could a possible source of error in this experiment be ? Thank you for your help!

**Math**

How do I write -2.3 as a rational number?

**Math**

Is -6/5 greater than -5/6?

**Math**

-3/4-1/2 I get -1/4 but my dad is saying -1 1/4. Can you please help with the answer and explain how you came up with it? Thank you

**Science**

Why is it difficult to reestablish a species permanently into its natural environment once the total number of a species drop below a population of 500? Thank you for your help.

**math**

I am trying to figure out the surface area of a garage. It has an A shaped roof. There is an overhang of 0.5m on each corner. Do I include this in determining the area of the roof? I need to figure out how much stucco is needed for the garage minus roof, window, and door. If i...

**Science**

Why are the different gene combinations in the zygote important to survival of the species. Please help Thank you!!!!

**Math**

I have to determine the unknown length of a right triangke to the nearest tenth of a unit. One side is 7m and the base is 10m. I got a friend to do this and age came up with 7.1m as the answer. When I do the steps I get the answer 12.21. I believe my friend is right but need h...

**Math**

[(-1)^3]^4-[(-1)^4/(-1)^3]^2 PLEASE HELP!!! The answer i come up with does not match answer on calculator. The big brackets are confusing me. Please help to explain this. Thanks so much for your help especially Steve

**Math**

(3^2*4^3)^2-(4^4/4^2)^2 Please help explain how to do this. I am not sure how to do this ! Thank you

**Math**

3^4 /3^3 + 4^2 *4^0/2^4 Please help and explains how you got the answer. I have been stuck on this for awhile and am not sure how to do this. Thank you!

**Social Studies**

To what extent did the Japanese worldview change during the Meiji period.

**Math **

A spinner has three congruent sectors colored orange, green, and purple. Every spin has has 1/3 chance of landing on any color and there is 1/9 chance of landing on orange and then on purple. There is 1/3 chance of landing on same color twice in a row. I need to make a tree di...

**Math**

I really need help please!! Karen, Gavin, Nasra, and Ali each have a deck of cards. Each student randomly draws a card from the deck. Find the probability of each event. a) each student draws a club. b) Karen draws a red card, Gavin draws a king, Nasra draws a black card, Ali ...

**Math**

Karen, Gavin, Nasra, and Ali each have a deck of playing cards. Each student randomly draws a card from the deck. Find the probability of these events: a) Each student draws a club. b) Karen draws a red card, Gavin draws a king, Nasra draws a black card, Ali draws the 2 of clu...

**Math**

Every time Jim shoots a free throw in basketball, he has an 80% chance of making the shot. He is given 3 free throws. Find the probability of each event. a) misses all 3 shots b) misses the first two shots and makes the third. Can someone please explain to me how to get the an...

**Bob pursley**

Sorry I misspelled your name in my previous post:)

**Math**

Each time Parker shoots a free throw in basketball, he has an 80% chance of making the shot. Suppose he is given 3 free throws. Find the probability of each event. a) Makes the basket, misses the basket, makes the baset b) makes all 3 shots Please help having hard time with this

**Math**

Please help I don't get how to do this! A spinner has three congruent sectors colored orange, green, and purple. Use the rule of probability of each event. a) landing on orange, then landing on purple b) landing on the same color 2 times in a row.

**Math**

Can someone please help me! A regular 6sided die is rolled three times. Find the probability of each event: a) Three 6s in a row b) 5,1,even c) Odd, greater than 2,5 Show all work I have been looking at examples and trying all night and I can't figure this out.

**Science**

Please please help this is the second time I have posted this question. Calculate the amount of work it will take to lift a lawn mower with a mass of 8kg onto the back of a truck which is 0.75m off the ground.show all conversions in your work.

**Math**

Every time Mr. Cold born throws a ball of paper in the garbage can, the probability the ball goes in the cans is 3/4. What is the probability he misses 2 times in a row? Please show all work. Please help I don't understand probability

**science**

A hydraulic jack is needed to raise an object with a force of 4000 N to a height of 3 metres above the ground. Will the jack do the job? (Answer after working through the rest of the question. I would really appreciate it if someone would please help me with this question. Tha...

**Math**

What is the probability of tossing two coins and having them both show heads? Show all work. Please help I don't understand this.

**science**

Calculate the work done by lifting a stack of books 0.5 m onto a table. The force you exerted eas 150N. Please help I am lost as how to do this

**science**

Convert 32 newton-meters to Joules. Please help!

**Social Studies**

Writeacher The period of time fir the social question is the Edo period. Sorry about thar!

**Social Studies**

How did social controls shape Japenese identity and citizenship. In your response be sure to discuss the areas of religion and class structure. Please help as I do not really understand the question

**Math**

The cost of Admission to a fair is $10, plus $3 per ride. An equation for this relation is C=10+3r, where r represents the number of rides a person goes on, and C represents the total cost of admission and rides. Make a table of values for the relation . Please help do not und...

**Math**

I need to make a table where y=-x using the numbers -3 to 3. I don't understand.

**Math**

Ms.Sue You helped me with a table but now I have to do one where y=-x using integers from -3 to 3. I am still unsure of how to do this. When I tried I got the same results as the previous table. I really appreciate your help and am trying very hard to understand this but am fi...

**Math**

I have to make a table with y on one side and x on the other. y=x. I have to provide integer values of x from -3 to 3. I don't understand how to do this. Please help!

**Math**

Solve equation. -5(s-7) = 15

**Math**

Uncle Ritchie has some $10 bills in his wallet. He shares all of them equally among his 4 nieces and nephews. Each of the nieces and nephews then donates two $10 bills to charity. They then each have five $10 bills. How many $10 bills did Uncle Ritchie have in his wallet? a) w...

**Math**

Please help!!! Scott bought 54m of fencing to enclose a rectangular plot of land. The width of the rectangular plot is 12m. Assume Scott uses all the fencing. What is the length of the rectangular plot of land? a) choose a variable to represent the length of the rectangular pl...

**Math**

Expand and simplify. 2(3+4y+7) I got 8y + 20 but I don't think this is the right answer.

**math**

A school uniform consists of a shirt and a pair of shorts. A shirt costs $22. A pair of shorts costs $15. Write an expression to find the cost of supplying n students with uniforms. Evaluate the expression for 8 students.

**Math**

-17 + n/ -3=9 I don't understand this. Please help

**Math**

t/-9 + 8= -5 Please help with this when I do it my answer is not -5.

**math**

One-quarter of the chicken pieces in the dish are wings. There are 7 wings. Hiw many chicken pieces are in the dish? Write an equation to solve the problem.

**math**

The Grade 8 students had a graduation dinner. They paid a flat rate of $125 for the use of the hall, plus $13 for each student who attended. The total cost of the dinner was $944. How many students attended the dinner ? Write an equation to solve the problem.

**math**

Jack and Diane went to the movies. They each paid the same amount for an admission ticket. Together, they spent $12 on snacks. The total cost of admission and snacks for Jack and Diane was $26. How much was each admission ticket? Choose a variable. Write an equation you could ...

**Math**

Find the missing number in this pair of equivalent ratios. _:12 : 36 and 8 : 4 : 12

**math**

Ivan has completed 45% of his walk. He has already walked 9 km. How much farther does he have left to walk? I don't understand how to do this. Could you please help and show me how you got this answer? Thank you.

**Science**

Glass bricks are used where people want light allowed through, but still have privacy. What do the bricks do to make this happen? Please help I have searched everything and can not find the answer.

**Science**

Glass bricks are used where people want light allowed through, but still have privacy. What do the bricks do to make this happen?

**science**

What happens to refraction when the angle of incidence lays on the normal line? Please help I have searched everywhere and can't find the answer!!!

**Science**

What happens to refraction when the angle of incidence lies on the normal line?

**science**

At what angle of incidence does refraction stop and reflection begin?

**Social Studies**

How did being part of the Arab Islamic world affect Spain?

**Math**

Hi Steve, You helped me with a question earlier today about finding surface area of a triangular prism with the base being an equilateral triangle . I got the answer 386.6 Is this correct.? I tried to follow your equation and am having a bit of trouble. Thanks for all your help.

**Math**

A triangular prism has an equilateral triangle as its base. The base of the triangle is 10cm and its height is 10cm. The length of the prism is also 10cm. Find it's surface area

**Math**

The surface area of a cube is 150cm squared. The area of one face of the cube is 25cm squared. What is the length of one edge of the cube?

**Math**

Tracy made a stained glass jewellery box. It measured 20cm by 12cm by 8cm. a) About how much glass did Tracy use? b) one piece of glass has an area of 100 cm squared and costs $3.65. How much did the glass cost?(assume all pieces can be used Please help don't understand th...

**Chemistry**

Briefly explain what the consequense would be if excess 6M NaOH solution instead of ^m NH3 solution were used to separate Fe3+ and Al3+ ions from Ca2+, Cu2+,and K+ ions at pH 9-10.

**Math**

When you divide a proper fraction by an improper fraction, is the quotient less than 1,greater than 1,or equal to 1? I think it is less than one but I'm not sure

**math**

Antoine estimates he can read one and a quarter chapter of a novel in one hour. Jenna estimates she can read three chapters of the same novel in 2 5/6 hours. Antoine read for 8 hours. Jenna read for 6 hours. Who read more chapters? Show work. Please help!!!!

**math**

Ms.Lecky ordered pizza for a party. 1 5/8 of the cheese pizzas and 2/3 of the ham pizza were not eaten. How much pizza was left?

**Math**

Hi Ms. Sue I got 34 for answer c and 17/30 for answer d Thanks for your help, much appreciated

**Math**

A dock is 7 3/4m high. The portion of the dock above water one day was measured at 2 2/5 m high. How much of the dock structure was below water that day?

**Math**

Solve the problem. Estimate to check your solution is reasonable. 1. During a 1 hour phone in talk show eight callers made calls hat took 3 1/4 minutes each. a) How many minutes were used by the eight callers? b) what fraction of the hour was used by callers? c) how many minut...

**Math**

Thank you Steve for your help! I need help on another question. I have to show 10/8 divided by 5/8 on a number line. I don't know how to set this up. I am lost!!! Please help to explain this. Thank you

**Math**

Thank you Steve for all your help! I have another question . I need to show 10/8 divided by 5/8 on a number line. I am completely lost!!! Please explain how to do this

**Math**

Amber made 5 3/4 pitchers of iced tea for her friends. They drank 2/3 of the iced tea. How many pitchers of iced tea did they drink? Do I subtract to get the answer?

**math**

How do you solve 5/8*3 4/5 It should read five over eight multiplied by three and four fifths

**Math**

Daphne replaced light bulbs in her mothers store.She had 3/4 of a box of light bulbs. She used 1/3 of the bulbs. a. What fraction of the box of light bulbs was left? b. How many light bulbs are in a full box? Explain. Thanks to everyone who helps answer questions it is appreci...

**Math**

I am having a hard time doing equivalent fractions. Would 3/5 of 2/9 be equivalent? Please help