Saturday

April 18, 2015

April 18, 2015

Total # Posts: 80,344

**Physics Dynamics**

A sled of mass m = 70.0 kg is being pulled horizontally on a frictionless floor by a force F = 420 N that makes an angle 20.0o above the horizontal. What is the magnitude of the normal force applied by the ground on the sled?
*February 12, 2015*

**Physics Dynamics**

A person stands on a bathroom scale in a motionless elevator. When the elevator begins to move, the scale briefly reads only 0.69 of the person's regular weight. Calculate the magnitude of the acceleration of the elevator.
*February 12, 2015*

**Physics Dynamics**

A child slides down a slide with a 24o incline, and at the bottom her speed is precisely one-third what it would have been if the slide had been frictionless. Calculate the coefficient of kinetic friction between the slide and the child.
*February 12, 2015*

**Physics Dynamics**

An arrow has an initial launch speed of 32 m/s. If it must strike a target 38 m away at the same elevation, what should be the projection angle?
*February 12, 2015*

**Physics Dynamics**

Swimming at 2.00 m/s relative to still water, a swimmer heads directly across a river of width 80 m. He arrives 35 m downstream from the point directly across the river from his starting point. (a) What is the speed of the current in the river? (b) At what angle relative to ...
*February 12, 2015*

**Quick english check**

Use the house on mango street, "No Speak English" to answer the following questions. Please correct me if I'm wrong. 1. Which of the following best illustrates the conflict between "mamacita" and her husband? A. "He worked two jobs. He came home ...
*February 12, 2015*

**Physics**

You are hitting a tennis ball against a wall. The 0.057-kg tennis ball traveling at 29 m/s strikes the wall and rebounds at the same speed. Earth is the object of reference. Determine the ball's change in momentum (magnitude).
*February 12, 2015*

**Physics**

An old building is being demolished by swinging a heavy metal ball from a crane. Suppose that such a 85kg ball swings from a 20-m-long wire at speed 10m/s as the wire passes the vertical orientation. What tension force must the wire be able to withstand in order not to break? ...
*February 12, 2015*

**Math**

It's not suppoesd to be a fraction!!
*February 12, 2015*

**Math**

What did he start with not left with plus he left with 120 dollars and he started with 3?I don't think that is resonable.
*February 12, 2015*

**Math**

How much did Aaron start with? Aaron spent 3/7 of his money. He gave ¼ of the remainder to his sister. He had $120 left. How much money did he have in the beginning? Explain how you got your answer. The way you solved this problem was wrong.Aaron did not start out with ...
*February 12, 2015*

**Science**

How does the sporophyte generation of a plant differ from the gametophyte generation? Use the words spores, sperm cells, and egg cells in your answer.
*February 12, 2015*

**art**

Florida virtual school does not give art text books.
*February 12, 2015*

**art**

Ms. Sue not all of us have books that's why we come to this site. Thank you for all your help and all others that take the time to help us. Have a great day.
*February 12, 2015*

**art**

Please don't get mad at me. Could it be D?
*February 12, 2015*

**art**

What factor might motivate a museum to hastily restore art without considering whether or not the restoration good for the piece? A. a freshly-restored artwork will last longer B. a freshly-restored artwork is easier to display C. a freshly-restored artwork will not spread ...
*February 12, 2015*

**math**

I mean 7/28 to 3/7
*February 12, 2015*

**math**

120.25 + 7/28
*February 12, 2015*

**art**

I completely agree with Ms. Sue. :)
*February 12, 2015*

**art**

An archeologist wants to dig up the burial site of a group of ancient Native Americans, to preserve the artifacts in a museum. What is the drawback for Native Americans to preserving these burial artifacts in a museum? A. The artifacts may not be properly preserved by the ...
*February 12, 2015*

**Math**

How much did Aaron start with? Aaron spent 3/7 of his money. He gave ¼ of the remainder to his sister. He had $120 left. How much money did he have in the beginning? Explain how you got your answer.
*February 12, 2015*

**Science**

Which of the following is true about diabetes? A. The pancreas overproduced glucose, and so insulin must be injected to reduce glucose levels. B. The pancreas underproduced glucose, and so insulin must be injected to increase glucose levels C. The pancreas overproduced insulin...
*February 12, 2015*

**math**

How much did Aaron start with? Aaron spent 3/7 of his money. He gave 3 of the remainder to his sister. He had $120 left. How much money did he have in the beginning? Explain how you got your answer.
*February 12, 2015*

**physics**

an object is projected with a velocity of 10m/s from the ground level at an angle to the vertically, the total time of flight of projectile os 10secs. calculate angle when (g=10m/s) show workings
*February 12, 2015*

**Art**

No problem at all, tell me how it goes ;)
*February 12, 2015*

**Art**

Hi Callie! I believe it's C. Just make sure with your textbook like Ms. Sue suggested. :) Hope this helps! ;)
*February 12, 2015*

**math**

How much did Aaron start with? Aaron spent 3/7 of his money. He gave 1/4 of the remainder to his sister. He had $120 left. How much money did he have in the beginning? Explain how you got your answer.
*February 12, 2015*

**Math**

How much did Aaron start with? Aaron spent 3/7 of his money. He gave ¼ of the remainder to his sister. He had $120 left. How much money did he have in the beginning? Explain how you got your answer.
*February 12, 2015*

**Science**

Which of the following is true about diabetes? A. The pancreas overproduced glucose, and so insulin must be injected to reduce glucose levels. B. The pancreas underproduced glucose, and so insulin must be injected to increase glucose levels C. The pancreas overproduced insulin...
*February 12, 2015*

**chem**

How many grams of calcium chloride will be produced when 30.0g of calcium carbonate are combined with 14.0g of hydrochloric acid?
*February 12, 2015*

**Chemistry **

Given that the initial rate constant is 0.0190s−1 at an initial temperature of 22 ∘C , what would the rate constant be at a temperature of 190 ∘C for the same reaction described in Part A? Activation Energy 32.4kJ/mol
*February 12, 2015*

**Algebra 2**

The area of a dining room is 160 square feet. a rectangular rug placed in the center of the room is twice as long as it is wide. If the rug is bordered by feet of hardwood floor on all sides, find the dimensions of the rug.
*February 12, 2015*

**math**

If r = 4 cm, h = 18 cm, and a = 7 cm, what is the volume of birdseed that the bird feeder can hold at full capacity?
*February 12, 2015*

**physics**

A frictionless incline is 5.00 m long (the distance from the top of the incline to the bottom, measured along the incline). The vertical distance from the top of the incline to the bottom is 4.03 m. A small block is released from rest at the top of the incline and slides down ...
*February 12, 2015*

**S.S**

Among the first settlers of the Oregon country, after trappers, were the ____ . A.Missionaries B. Merchants C. Schoolteachers D. farmers I think its A 2.What north american territories did Russia control in the early 1800s? A. California and Nevada B. the territories from ...
*February 12, 2015*

**Geometric progression**

The Product of three Consecutive terms of a G.P. is -64 and the first term is four times the third. find the number.
*February 12, 2015*

**Physics**

Two identical resistors are connected in parallel across a 26-V battery, which supplies them with a total power of 9.8 W. While the battery is still connected, one of the resistors is heated so that its resistance doubles. The resistance of the other resistor remains unchanged...
*February 12, 2015*

**Chemistry 2 **

Calculate the molality, molarity, and mole fraction of FeCl3 in a 25.7 mass % aqueous solution (d = 1.204 g/mL).
*February 12, 2015*

**physics**

A 14-Ω loudspeaker, a 9.0-Ω loudspeaker, and a 3.2-Ω loudspeaker are connected in parallel across the terminals of an amplifier. Determine the equivalent resistance of the three speakers, assuming that they all behave as resistors. Answer: (1/14)+(1/9)+(1/3.2...
*February 12, 2015*

**math**

7^-(1/5) / 7^-(7/5) * 7^3/5 can be simplified as 7^a/b where a and b are positive integers. find a*b-a answer: 7^-(1/5) / 7^-(7/5) * 7^3/5 7^5/7(5/7) * 7 ^3/5 <- plz explain this part? 7^(8/5-3/5)=7*5/5
*February 11, 2015*

**Physics**

The rms current in a 41-Ω resistor is 0.69 A. What is the peak value of the voltage across this resistor? Answer: V(rms) = A(ohms)(sqrt2)
*February 11, 2015*

**chem**

How many chloride ions are present in 65.5 mL of 0.210 M AlCl3 solution
*February 11, 2015*

**physics**

A box of mass 26 kg is hung by a thin string from the ceiling of an elevator. The string can hold up to 276.1 N and will break under larger tension force. How much can the maximum acceleration of the elevator be going upward so that the string does not break and continues to ...
*February 11, 2015*

**Find the domain of the function**

Find the domain of the function. f(x)=8+3/x^3
*February 11, 2015*

**rubidoux high school**

y+60
*February 11, 2015*

**Algebra **

x^1/2 - 7x^1/4 + 12 = 0
*February 11, 2015*

**Science**

Are there more hours of daylight in the summer than in the winter
*February 11, 2015*

**Science**

What do angiosperms produce in order to protect their seeds?
*February 11, 2015*

**Physics**

If the drive chain exerts a force of 2090 N at a radius of 5.00 cm, what is the angular acceleration of the wheel? (b) What is the tangential acceleration of a point on the outer edge of the tire? (c) How long, starting from rest, does it take to reach an angular velocity of ...
*February 11, 2015*

**math **

The demand function for a product is p=32−8q where p is the price in dollars when q units are demanded. Find the level of production that maximizes the total revenue and determine the revenue. q= units R= $
*February 11, 2015*

**Chemistry**

The freezing point of benzene is 5.5°C. What is the freezing point of a solution of 8.30 g of naphthalene (C10H8) in 320. g of benzene (Kf of benzene = 4.90°C/m)?
*February 11, 2015*

**science**

plz help
*February 11, 2015*

**science**

describes the movement of an object at rest if no outside forces act on it? a; it will move due to inertia b; gravity will eventually cause it to move c; it will stay at rest due to inertia d; it will stay at rest due to gravity...
*February 11, 2015*

**Math - Answer Check**

Write the composition function and then find the value. f(x) = 2x+3 g(x) = x^2 k(x) = square root(x - 4) 1. g(k(x)) g(k(20)) My answer: Function is x - 4, the value is 16. 2. f(g(x)) f(g(2)) My answer: Function is 2x^2 + 3, the value is 11.
*February 11, 2015*

**math**

I tries to figure out the answer you give but i just got more confuse.. where it 7^-(1/5)
*February 11, 2015*

**math**

what is mean when the question ask find a*b-a ?
*February 11, 2015*

**math**

7^5/7(5/7) * 7 ^3/5 <-- I don't understanding this part?
*February 11, 2015*

**math**

7^-(1/5) / 7^-(7/5) * 7^3/5 can be simplified as 7^a/b where a and b are positive integers. find a*b-a i'm not good when it come to negative exponent, plz help!
*February 11, 2015*

**government**

Who are the top 5 most important members of the Executive Office of the President?
*February 11, 2015*

**Physics**

Why does the potential inside a solid conductor not change?
*February 11, 2015*

**Physics**

Does the potential inside a hollow conductor change and why?
*February 11, 2015*

**marketing**

the first step in taking control of your finances is
*February 11, 2015*

**Geography**

new found planet
*February 11, 2015*

**Calc**

Find the solution to e^x = 2+2x
*February 11, 2015*

**science**

vertical velocityinitial=35sin35 horizoal velocity=35cos35 time in air consider vertical hf=hi+vi*t-1/2 g t^2 0=0+35sin35*t-4.8t^2 solve that with the quadratic equation.. max height is when vv=0 vv=vi*35sin35-gt=0 solve for time at max height, then maxhdight=35sin35*t-1/2 g t^2
*February 11, 2015*

**science**

A golf ball leaves the club 35m/s at an teta of 35 degree above the horizontal . Find a) range b) maximum height reached c) time of flight
*February 11, 2015*

**math**

The shadow of an electric pole is 5 m. long when thr angle of elevation of the seen is 60 degrees. Find the length of the shadow when the angle of elevation of the seen is 45 degrees
*February 11, 2015*

**math**

eddie made a beaded necklace for his mother. every third bead is blue. every seventh bead is green. all the remaining beads are white. there are 20 beads in all. how many beads are blue? green? white?
*February 11, 2015*

**Physics**

I dont Know
*February 10, 2015*

**physics**

Mary applies a force of 71 N to push a box with an acceleration of 0.57 m/s2. When she increases the pushing force to 83 N, the box's acceleration changes to 0.86 m/s2. There is a constant friction force present between the floor and the box. a) what is the coefficient of ...
*February 10, 2015*

**math**

thank you
*February 10, 2015*

**math**

amelia made her vegetable garden in the shape of a square. each side is 32 feet long. amelia walked around her garden. how many feer did she walk in all?
*February 10, 2015*

**chemistry**

Electrolysis is carried out for 2.00 h in the following cell. The platinum cathode which has a mass of 25.0782 g, weighs 25.8639g after the electrolysis. The platinum anode weighs the same before and after the electrolysis. there is H2SO4(aq) on the anode side and AgNO3(aq) on...
*February 10, 2015*

**Math**

u need to say that u haven't completely solved the question , u dont if he's smart or not
*February 10, 2015*

**Math**

the question asks , who had the higher balance. u did not answer that
*February 10, 2015*

**Math**

ms. sue, u did not answer that question right
*February 10, 2015*

**Math**

There are 12 E's among the 100 tiles in Scrabble. What is the probability of selecting all 4 E's when selecting 4 tiles? One answer key says 1/735 while another says 3/23765, but I think it is the second one.
*February 10, 2015*

**Math**

(x^6z^-1/3/-125y^-9z^8/3)^-1/3
*February 10, 2015*

**math**

I'm in grade 5 and I need help on an area and perimeter question. The area of a rectangle is 300mm and the length of it is 15 mm. I need to find out the width of this rectangle.
*February 10, 2015*

**Math**

230 / 14 does not come out even
*February 10, 2015*

**Math**

15 * 12 = 180 14(410 - 180) = ? That wont work becuase there is only 410 tangerines.
*February 10, 2015*

**Math**

Packaging Tangerines The produce manager at the grocery store had 410 tangerines. He put some of them into 15 cartons containing 12 tangerines each. He then put the rest into 14 cartons, each containing the same number of tangerines. How many tangerines were in each of the 14 ...
*February 10, 2015*

**Math**

is that a. or b.
*February 10, 2015*

**Math**

Packaging Tangerines The produce manager at the grocery store had 410 tangerines. He put some of them into 15 cartons containing 12 tangerines each. He then put the rest into 14 cartons, each containing the same number of tangerines. How many tangerines were in each of the 14 ...
*February 10, 2015*

**math**

what is 2 5/8 - 3 6/8
*February 10, 2015*

**Math**

6.5 c=. Fl oz
*February 10, 2015*

**Social studies**

Rosalin is preparing to interview for the job described in the ad her resume contains the give facts listed below which should she talk about in the interview as being most relevant to the job
*February 10, 2015*

**probabilitie**

Mary and Tom park their cars in an empty parking lot with n>=2 consecutive parking spaces (i.e, n spaces in a row, where only one car fits in each space). Mary and Tom pick parking spaces at random. (All pairs of parking spaces are equally likely.) What is the probability ...
*February 10, 2015*

**Math**

c-5 surely you had figured that out on your own...
*February 10, 2015*

**Math**

(120-80):80
*February 10, 2015*

**math**

(3*39.99 + 3*39.99/2)(0.75)(1.0438) = ?
*February 10, 2015*

**Math**

one of the numbers is even. an even multiple of any number is even.
*February 10, 2015*

**physics**

You are driving into St. Louis, Missouri, and in the distance you see the famous Gateway-to-the-West arch. This monument rises to a height of 192 m. You estimate your line of sight with the top of the arch to be 7.31 ° above the horizontal. Approximately how far (in ...
*February 10, 2015*

**Math**

For an art exhibit, Craig has to choose 3 ceramic mugs out of the 7 that he made over the summer. In how many ways can he arrange these 3 mugs in a row? I'm not looking for the answer, but only an explanation for why this is a permutation problem and not a combination one.
*February 10, 2015*

**english**

Its A
*February 10, 2015*

**physics**

What is the mass of a man if he accelerates at 42 m/s/s and has a mass of 112 kg?
*February 10, 2015*

**chemistry**

I have 120 ml of a 2M NAOH solution. If Ionly use 10 ml the molarity of the 10 ml is stil 2M, correct?
*February 10, 2015*

**Anonymous**

input: 1 2 5 10 output: 7 11.5 25 47.5 What is a function rule?
*February 10, 2015*

**math**

Nicole is making a bowl of chex mix to serve to her guests .She has already put 45 cups of nuts,410 cups of raisins and 112 cups of chocolate chips in the bowl.If she wants to make 4 cups total ,how much chex cereal will she need to add?
*February 10, 2015*

**statistics**

The response to a question has three alternatives: A, B, and C. A sample of 120 responses provides 52 A, 29 B, and 39 C responses. Show the frequency and relative frequency distributions (use nearest whole number for the frequency column and 2 decimal for the relative ...
*February 10, 2015*