Tuesday

April 28, 2015

April 28, 2015

Total # Posts: 653

**genral sicence**

blue stars always have the highest surface temperatures
*December 2, 2013*

**Physics (fix)**

Adding friction to a pulley problem, regardless of if a mass in on an incline or not, will almost always increase the tension in an atwood machine- type pulley problem. This is because friction will always oppose motion, so there will be more forces working against the force ...
*December 2, 2013*

**Physics**

A trailer with a mass of 2.00x 10^3 kg is pulled by a truck with a mass of 3.00 x 10^3 kg. If the applied force is 8750 N and the frictional force exerted by the road is 2560 N, what is the acceleration of the truck and trailer?
*December 1, 2013*

**Physics**

A trailer with a mass of 2.00x 10^3 kg is pulled by a truck with a mass of 3.00 x 10^3 kg. If the applied force is 8750 N and the frictional force exerted by the road is 2560 N, what is the acceleration of the truck and trailer?
*December 1, 2013*

**physics**

Suppose that the range of output frequencies is from 47.4 Hz to 14.8 kHz for a pipe organ. Take 343 m/s for the speed of sound. (a) What is the length (in units of m) of the longest pipe open at both ends and producing sound at its fundamental frequency? (b) What is the length...
*November 22, 2013*

**science**

Oh, ok. You're right. What if the seed is a marigold? I'm working on that one. Okay, thank you again Ms. Sue.
*November 17, 2013*

**science**

How many weeks does it take for a seed to start germinating? Does it depends?
*November 17, 2013*

**science**

Thank you, Ms. Sue!
*November 17, 2013*

**science**

How many cups of water are needed for a plant to begin germinating?
*November 17, 2013*

**Science**

is it c
*October 20, 2013*

**Science**

is it b
*October 20, 2013*

**Science**

Water freezes at 0 Celisus. If a temperature drop is causing a glass of water to freeze, how would a thermometer in the water most likely change as the water freezes? A. The temperature would keep rising steadily. B. The temperature would keep falling steadily. C. The ...
*October 20, 2013*

**Science**

is it D
*October 20, 2013*

**Science**

I think it is A but I am not sure
*October 20, 2013*

**Science**

Scientific investigations involve many steps and processes. Which characteristics define a laboratory experiment? A. hypothesis, models, and calculations B. test variables, data, and uncontrolled conditions C. data, conclusions, and unregulated environment D. independent and ...
*October 20, 2013*

**Science**

Astrologers relate the location of stars and planets to events in human lives. Many years ago, people classified astrology as a science. Why do modern scientists consider astrology to be a pseudoscience A. Astrology does not involve the use of telescopes. B. Astrology does not...
*October 20, 2013*

**6th Grade Math**

18yd=54ft (3ft=1yd)
*October 5, 2013*

**Algebra**

find the value of r so that the line that passes through each pair of points has the given slope (r,4), (7,1), m=
*September 27, 2013*

**Stats/math**

The deciles of any distribution are the 10th, 20th,...90th percentiles. The first and last deciles are the 10th and 90th percentiles, respectively. What are the first and last deciles of the standard Normal distribution? HOw would i solve this? thank you sooo much!
*September 14, 2013*

**Technology**

What is a object in which the electrons at one end spin in one direction and the electrons at the other end spin in an opposite direction? A. load B. turbine C. Magnet D. Charge
*September 14, 2013*

**Science**

What is a object in which the electrons at one end spin in one direction and the electrons at the other end spin in an opposite direction? A. load B. turbine C. Magnet D. Charge
*September 12, 2013*

**Science**

What is a object in which the electrons at one end spin in one direction and the electrons at the other end spin in an opposite direction? A. load B. turbine C. Magnet D. Charge
*September 12, 2013*

**Y12 Maths A**

Suppose you had written 50 letters and addressed 50 envelopes and then inserted the letters randomly. What is the probability that exactly one letter goes to the wrong person (ii) What is the probability that each letter goes to the correct person? Justify your decision.
*August 16, 2013*

**philosphy/Critical Reasoning**

any help with evaluating an article called nightmare in Green by jarret B. Wollstein
*June 24, 2013*

**Physics**

Suppose you walk 18.0m straight west and then 25.0 m straight north. How far are you from your starting point and what is the compass direction of a line connecting your starting point to your final position>
*June 11, 2013*

**Maths A Year 12**

Four years ago, an art collector bought a painting for $32 500. He knows that this painting appreciates at 15% a year. What is this painting worth now, to the nearest $100?
*June 9, 2013*

**Maths A**

$20 000 is invested in a term deposit at 5.4% p.a. with monthly rests. What will be the value of this investment after 3 years?
*June 9, 2013*

**Maths**

Quarterly changes in population are converted to an annual change by multiplying growth factors. A growth factor = 1 + i where i is the percentage increase given in decimal form. The four quarterly increases in the number of staff employed by a particular company last year ...
*June 9, 2013*

**Maths A**

In January this year, Kathryn bought a new computer for $6000. She estimates its useful life as 5 years and its scrap value as $1500. If Kathryn uses the diminishing value method, determine the value of this computer at the end of 3 years.
*June 9, 2013*

**probability statistics**

Tall clubs international Tall clubs international has minimum height requirement for men and women. If the reqirements are changed so that the tallest 4% of men are eligible, what is the new minimum height for men?
*June 4, 2013*

**math**

e^(3x) sin(4x) value of definite integral when a is pi/4 and b is 0 i get 4/25 * (e^(3pi/4) how to simplify
*May 26, 2013*

**Physics**

Note: P is located above the middle of a, a distance of z P (distance vertical z) ___________________ [-------a---------]
*May 22, 2013*

**Physics**

Electric charge charge is distributed uniformly along a thin rod of length "a", with total charge Q. Take the potential to be zero at infinity find the potential at P. If z>>a, what would be the potential at p? From potential find the electric field at point p ...
*May 22, 2013*

**Math, Gr 10**

A rectangular field is to be enclose by 800 meters of fencing and the fourth side with be along the side of a barn. A) What dimensions will give the maximum area? B) What is the maximum area?
*May 6, 2013*

**physical science**

Can you answer this please !
*April 29, 2013*

**Spanish**

Please could you help me unscramble each of the clue words in Spanish: issmpna os hewiaes It is either a breakfast or lunch? Thank you for your help, Anne
*April 29, 2013*

**physics**

1)An elastic material has a length of 36cm when a load of 40N is hung on it and a length of 45cm when a load of 60N is hung on it. The original length of spring is? 2)A force of 100N stretches an elastic spring to a total of 20cm. If an additional force of 100N stretches the ...
*April 9, 2013*

**maths**

Usinng the prime factor method square root of31.36 is 5.6
*April 9, 2013*

**Trig**

Solve the trig equation exactly over the indicated interval. tanθ = 0, all real numbers I know the answer is πn, but I don't understand how they got this. I get that tanθ = 0 on π and 2π on the unit circle, so did they just put n on the end of &#...
*April 7, 2013*

**Math**

The number of red cards in Lyle's trading card collection is directly is proportional to the number of yellow cards. At one point, Lyle's collection consisted of 56 red cards and 224 yellow cards. If r represent the number of red cards, and s represents the number of ...
*April 6, 2013*

**Quantum Physics**

9 is 175.8 Anyone 8D ,8E,6C,6D?
*April 6, 2013*

**Math**

thank you
*March 30, 2013*

**Math**

is it A?
*March 30, 2013*

**Math**

ok thanks
*March 30, 2013*

**Math**

Ray wanted to put his tomato plants in rows with the same numbers of plants in each row. He knew that if he planted 5,6, or 7 rows of tomatoes, he would have at least one plant left over. However, his plants could be placed evenly in 8 rows. Which of the following numbers ...
*March 30, 2013*

**math**

What's 3 out of 4 of the apples are green.how many apples are green
*March 25, 2013*

**Quantum Physics**

For the problem 6 the solution is "1" Anyone tried the problem 5?
*March 24, 2013*

**Math**

thank you mrs. sue that helped me alot
*March 23, 2013*

**Math**

hailey wants to rake her entire yard. This morning she raked 1/3 of the yard, and this afternoon she raked another 3/5 of the yard. What fraction of her yard still needs to be raked?
*March 23, 2013*

**Math**

no it is asking what is the probability not what you are saying . What he did was wrong
*March 20, 2013*

**Math**

is the answer d then?
*March 20, 2013*

**Math**

I am confused ms. sue i don't get it what is the answer
*March 20, 2013*

**Math**

There are 12 girls and 9 boys in Mrs. Johnson's classroom. She said that if she randomly selects one student from her classroom the probability that it is a boy is 3/4. Which mistake did Mrs. Johnson make? A. She divided the number of girls by the total number of students...
*March 20, 2013*

**Quantum Physics**

Thanks so much!
*March 20, 2013*

**Quantum Physics**

Anyone have finished problems 3 and 5? Gluck and helpman, thanks so much, very usefull for me!
*March 20, 2013*

**Quantum Physics**

Problems 6 and 7 please!
*March 20, 2013*

**Maths A**

The Bough and Bud Company combined an insect spray with a growth hormone to produce the MOP (More Oranges Production) Treatment, which was expected to increase the number of oranges produced by each tree. The data below shows the number of oranges produced by each tree in two ...
*March 16, 2013*

**maths**

For the area shown on the attached chart, show/prove that the magnetic variation in 2013 would be 10°5’E.
*March 16, 2013*

**math **

the perimeter of a rectangle is 40 feet and its area is 96 square feet. find the length and width?
*March 6, 2013*

**math**

an example of play that relates to a curriculum standard in mathematics for preschoolers?
*March 4, 2013*

**Science**

Ms. Lewis is a chemist mixing two solutions together. A chemical reaction takes place, and the solution becomes warm. Which statement best describes what has happened? A. Energy has been created in the form of thermal energy B. Energy has been transformed from one form to ...
*February 2, 2013*

**Math**

A club is selling mugs with three different sports logos. The club sold 2(4m-25) football mugs, 2(4m-15) basketball mugs, and 4m+38 soccer mugs. Which expression represents the total number of mugs that the club sold? A. 18m-57 B. 18m-2 C. 16m-57 D. 15m+3
*February 2, 2013*

**Math**

o I get it now you use the distrutive property and got 6p-12 . thanks
*February 2, 2013*

**Math**

I got the answer c ? I think this is incorrect
*February 2, 2013*

**Math**

Which of the following expressions is the simplified form of -8+3(2p-4)+10p ? A. 16p-20 B. 8p-10 C. 6p-12 D. 12p-9
*February 2, 2013*

**Math**

thank you
*February 2, 2013*

**Math **

Which of the following expressions is the simplified form of 3y+8y-4+7-2y? A. 11y+3 B. 9y-11 C. 11y-3 D. 9y+3
*February 2, 2013*

**8th Grade History**

which group best fits this sentence: groups: African Americans, Asian Americans, Mexican Americans, Native Americans Sentence: Many members of this group turned dry, barren lands into profitable farms. Others worked in lumber mills, canneries, and mines
*January 21, 2013*

**Biology**

1.Which of the following accurately describes the relationship between cyanobacteria and halophiles? A.Cyanobacteria are photosynthetic, which suggests they existed before halophiles. b.Halophiles can survive in extreme conditions, which suggests they are more evolved than ...
*January 15, 2013*

**Government**

The passage of the Civil War amendments—the Thirteenth, Fourteenth, and Fifteenth Amendments—did not end discrimination of African Americans. However, the Supreme Court has relied on these amendments in deciding civil rights cases such as the case of Regents of ...
*January 5, 2013*

**Math help **

Two out of every 10 students in a school have a dog. Expressed as a decimal to the nearest hundredth, what is the probability that exactly 2 out of 6 students in a given class have a dog? (1 point) 0.33 0.02 0.20 0.25
*January 3, 2013*

**eng economic**

State the mount accumulated by each of the following present investment (i) RM7000 in 8 year at 9% compounded annually (ii) Rm1250 in 12 years at 4% compounded annually
*December 18, 2012*

**eng economic**

Zaki invested RM1000 now and RM1500 2years from now. He invests RM2000 4 years from now at an interest rate of 8% compounded annually. Estimate total amount in 10 years.
*December 18, 2012*

**engineering economic**

Ahmad is considering investing RM2000 to Ali's project at an interest rate 6% compound annually for 5 years or investing RM2000 to Rosli at 7% per year simple interest for 5 years. From your point of view which option is better and state your reason
*December 18, 2012*

**help..reflective journal**

write a 300 words reflective journal expressing the view on class activities and the own personal comments.
*December 16, 2012*

**math **

Stephanie has $67 to spend at a store. The store currently has a sale where the sale price is 23% off the marked price. What is the highest marked price that Stephanie can afford? (Round to the nearest cent, or hundredth of a dollar.) can you please show it step by step?
*December 11, 2012*

**math**

3 boys and 3 girls,how many boy - girl pairs can be formed ?
*December 9, 2012*

**math**

find the missing number;[8 1 4 5 7 ] { 81 4 25 36 ? }
*December 5, 2012*

**math**

we decided on a new logo for our brand of t-shirts.It was to be 3 stripes;(1) each stripe could be colored in 1 of 2 different colors,but we didn't want adjacent stripes to be the same color.how many different logos could we make.(2) how many more logos could we make if we...
*December 5, 2012*

**simple math**

how do i write out 17260 million 1,726,000? is that write or 17,260,000
*December 4, 2012*

**Physics**

how much heat energy must be applied to 100 grams of Lead to raise its temperature 20° C?
*November 12, 2012*

**physics**

A robot probe drops a camera off the rim of a 455 m high cliff on Mars, where the free-fall acceleration is 3.7 m/s2.Find the velocity with which it hits the ground. Answer in units of m/s
*November 11, 2012*

**physics**

A certain car is capable of accelerating at a uniform rate of 0.93 m/s2. What is the magnitude of the car’s displacement as it accelerates uniformly from a speed of 86 km/h to one of 98 km/h? Answer in units of m
*November 11, 2012*

**Chemistry**

The SI unit of length is a meter, which is defined as the length equal to 1,650,763.73 wavelengths of light emitted by a particular energy transition in krypton atoms. Calculate the frequency of the light to three significant figures.
*October 31, 2012*

**Chemistry**

Describe how to make 500.0 mL of 3.6 M acetone
*October 26, 2012*

**Chemistry**

In an experiment to measure the solubility of Ba(OH)2 x 8H2O in water, an excess of solid Ba(OH)2 x 8H2O was stirred with water overnight. the saturated solution was allowed to stand until all the undissolved solid had settled. a 10.00mL sample of the clear supernatant liquid ...
*October 25, 2012*

**Chemistry**

The solubility of CaSO4 is 0.209 g/100 mL of water at 30 degrees celsius. if 0.500 g CaSO4 is stirred overnight at 30 Degrees Celsius with 100.0 mL of water, a. How many grams of CaSO4 remain undissolved? b. Calculate the molarity of CaSO44 in solution
*October 25, 2012*

**Chemistry**

a 2.00 g sample of zinc was dissolved in 50.0 mL of 6.0 M HCL the final volume of solution was 50.2 mL... a. what was the concentration of Cl- after the zinc was dissolved?? b. what was the concentration of hydrogen ion after the zinc was dissolved??
*October 25, 2012*

**Chemistry**

assuming that each molecule contains one acidic hydrogen---that is, the formula is HCnHmOp? assumin gthat each molecule contains 2 acidic hydrogens---that is, the formula is H2CnHmOp??
*October 25, 2012*

**Chemistry**

By titration 24.68mL of 0.1017 M NaOH is required to neutralize 0.1482 g of an unknown organic acid. what is the formula mass of the acid?
*October 25, 2012*

**Government**

Im not asking for the answer im asking you to help me to understand what the question is asking for. If I could understand it from my book i would
*October 24, 2012*

**Government**

please help me with an explanation
*October 24, 2012*

**Government**

1. c 2.a 3.a
*October 24, 2012*

**Government**

Pluralists believe that the dominant player in American politics is (1 point) the president. groups. the government. rich individuals. the media. All of the following are generally more true of Americans than Europeans EXCEPT (1 point) they volunteer more time to their ...
*October 24, 2012*

**Physics**

A cannonball is fired with a velocity of 200 m/s at an angle of 25 degrees above the ground. After the total flight of 45.6 seconds, the cannonball returns to the ground. Calculate: the initial horizontal and vertical components of the velocity, the maximum height of the ...
*October 23, 2012*

**Physics**

A car of mass 1396 kg is parked on a very slippery hillside.To keep it from sliding down the hill (è = 15°), the owner attaches a cable. What is the tension in the cable?Determine the components of all the forces on the car along the coordinate axes.
*October 20, 2012*

**Physics**

Block 1 sits on a table with rope that is attached to block 2 hanging over the edge where m1 = 43 kg and m2 = 11 kg. Assume that there is no friction between m1 and the table. Find the acceleration of the crates and the tension in the string
*October 20, 2012*

**Physics**

Block 1 is up an incline and is attacthed to block 2 by a rope, with m2 = 5.0 kg and è = 33°.If the coefficient of static friction between block #1 and the inclined plane is ìS = 0.24, what is the largest mass m1 for which the blocks will remain at rest?
*October 20, 2012*

**Physics**

Consider a swimmer who wants to swim directly across a river. If the speed of the current is 0.31 m/s and the swimmer's speed relative to the water is 0.57 m/s, how long will it take her to cross a river that is 13 m wide?
*October 20, 2012*

**Physics**

A soccer ball is kicked with an initial speed of 23 m/s at an angle of 20° with respect to the horizontal.(a) Find the maximum height reached by the ball. (b) Find the speed of the ball when it is at the highest point on its trajectory. (c) Where does the ball land? That ...
*October 20, 2012*