Monday

February 20, 2017
Total # Posts: 5,132

**chemistry**

calculate the percentages by mass of the component element in sodium trioxonitrate(v)

*January 28, 2014*

**Chemistry**

The freezing point of a .200m solution: -.904 degrees Celsius.

*January 28, 2014*

**Chemistry**

Colligative Properties The freezing point of distilled water was determined by recording a thermogram: -0.176. The freezing point of a 0.200 m (molality) solution containing an unknown, ionic compound was determined by recording a second thermogram. a. Determine the freezing ...

*January 28, 2014*

**Physics**

A baggage carousel at an airport is rotating with an angular speed of 0.397 rad/s when the baggage begins to be loaded onto it. The moment of inertia of the carousel is 2440 kg·m2. Ten pieces of baggage with an average mass of 16.5 kg each are dropped vertically onto ...

*January 27, 2014*

**Physics**

A stationary bicycle is raised off the ground, and its front wheel (m = 1.70 kg) is rotating at an angular velocity of 21.9 rad/s (see the figure). The front brake is then applied for 1.35 s, and the wheel slows down to 4.47 rad/s. Assume that all the mass of the wheel is ...

*January 27, 2014*

**algebra**

thanks steve

*January 26, 2014*

**algebra**

suppose a ball is thrown upward from a height of 4.5 feet with an initial velocity of 21 feet per second. write an equation relating the time t and height h of the ball

*January 26, 2014*

**English**

the answer is b

*January 26, 2014*

**English**

no b

*January 26, 2014*

**Steve**

How do I find the vertex?

*January 25, 2014*

**Damon**

Sorry you were right my unit was wrong, thanks!

*January 25, 2014*

**steve**

As my final answer do I use ft or m ?

*January 25, 2014*

**Damon**

Okay this time my answer came to be 39.4 m but it still says incorrect. Did I not do my calculations correctly?

*January 25, 2014*

**Damon**

When I did that My answer came to be .501 but it was marked wrong. Was that the answer I was supposed to get?

*January 25, 2014*

**physics**

A lighthouse that rises h1 = 47.0 ft above the surface of the water sits on a rocky cliff that extends d = 17.4 ft from its base, as shown in the figure below. A sailor on the deck of a ship sights the top of the lighthouse at an angle of theta = 29.3 degree above the ...

*January 25, 2014*

**Damon**

I know but which values do I plug in?

*January 25, 2014*

**Damon**

For part E which x and y do I plug in?

*January 25, 2014*

**physics**

Data: theta_1 = 44.9 theta_2 = 146.1 A = 4.8 cm B = 8.7 cm A)What is the x component of vector A? B)What is the y component of vector A? C)What is the x component of vector B? D)What is the y component of vector B? E)What is the magnitude of vector (A + B)?

*January 25, 2014*

**Damon**

yes in terms of vf. we are asked to combine different kinematic equations to drive xf. I believe the equation v=vo+at^2 can sub for vo. does this make sense?

*January 25, 2014*

**Physics**

A hot-air balloon is rising upward with a constant speed of 2.20 m/s. When the balloon is 2.50 m above the ground, the balloonist accidentally drops a compass over the side of the balloon. How much time elapses before the compass hits the ground?

*January 24, 2014*

**math**

16 times 4 which equals 64 so the length of the rope was 64 inches

*January 23, 2014*

**math**

1/3 is the probability that Tom will score 24 or more times in tonight's game.

*January 23, 2014*

**math**

I do not understand what the question is.

*January 23, 2014*

**maths**

No it is actually 2 hundredths or 2/100. Hope this helps!

*January 23, 2014*

**physics**

A model rocket is launched straight upward with an initial speed of 47.7 m/s. It accelerates with a constant upward acceleration of 2.02 m/s2 until its engines stop at an altitude of 157 m. What is the maximum height reached by the rocket?

*January 23, 2014*

**math**

24 of each or 4 chicken paddies packs and 3 bun packs

*January 23, 2014*

**Math**

The answer is $510

*January 23, 2014*

**Social Studies**

I'm not so sure about the answers to these questions. Could you check my answers please? Thanks. Who led the federal troops that forced the Cherokee west on the trail of tears? -Andrew Jackson -Winfield Scott -William Henry Harrison** -Oliver Hazard Perry To win the ...

*January 19, 2014*

**Math**

What is the value of the following expression? - 3| -3 + 6| - 3

*January 15, 2014*

**math**

Eduardo thinks of a number between 1 and 20 that has exactly 5 factors . what number is he thinking of ? explain

*January 13, 2014*

**Physics**

how much energy is required to change 40 g of ice at -10 C to steam at 110 C?

*January 12, 2014*

**Physics**

a ball is given a velocity of 3.89 m/s at an angle of 32 degrees. Calculate the maximum height and the range of the ball after 5.0s.

*January 12, 2014*

**Physics**

A car traveling with an initial velocity of 68 km/h accelerates uniformly at a rate of 1.35 m/s^2 for 4.7s. Find the final speed and displacement of the car during the specified time interval.

*January 12, 2014*

**Physics**

A bus slows down uniformly from 75 km/h to 15 km/h in 12.55 s. How far did the car travel before stopping?

*January 12, 2014*

**Physics**

Henry walks 20 km west forgot his coat, so he turns and heads 13 km east. He decided to go another path to make up for the lost time and travels 30 km south and then moves west for 27 km. Calculate Henry's displacement.

*January 12, 2014*

**physics**

A child and a sled have a combined mass of 87.5 kg slides down a friction-less hill that is 7.34 m high. If the sled starts from rest, what is the velocity of the sled at the bottom of the hill?

*January 12, 2014*

**math**

Use synthetic division to find the quotient and remainder. (r^2-2r+2), (r-1)

*January 11, 2014*

**Science Please HELP!!!**

Which of the following are structures that rely on capillaries for exchange or movement of small molecules? 1 teeth, aorta, ureter 2 cartilage, epidermis, larynx 3 nephron, villi, alveoli 4 leukocytes, atrium, bronchi answer #2

*January 8, 2014*

**8th Grade Connections Academy**

What connection academy at ripon?

*January 8, 2014*

**Science Please HELP!!!**

Ms.Sue?

*January 8, 2014*

**Science Please HELP!!!**

1 teeth, aorta, ureter 2 cartilage, epidermis, larynx 3 nephron, villi, alveoli 4 leukocytes, atrium, bronchi answer #2

*January 8, 2014*

**Science Please HELP!!!**

Please anyone!!!

*January 8, 2014*

**Science Please HELP!!!**

Which of the following are structures that rely on capillaries for exchange or movement of small molecules?

*January 8, 2014*

**Physics**

A car of mass 900.0 kg accelerates away from an intersection on a horizontal road. When the car speed is 49.7 km/hr (13.8 m/s), the net power which the engine supplies is 4300.0 W (in addition to the extra power required to make up for air resistance and friction). Calculate ...

*January 2, 2014*

**math**

thank you starting to get it little by little

*December 18, 2013*

**math**

how would you do the following 12 divided by 2 7/8, 1 1/6 x 3 3/8 ,

*December 18, 2013*

**math**

I think it is 12 because like he/she said is true.

*December 17, 2013*

**math**

How do you do the following 1 5/8 +2 7/24 and 1 3/8 divided by 2/4. NOT SURE OF THE FORMULA

*December 17, 2013*

**math**

Thank you. I thought so too

*December 16, 2013*

**math**

At the Pentagon there are921 feet along each outer side facade and 17.5 miles of corridorS inside it. All sides of the Pentagon are equal. What is the perimeter of the Pentagon

*December 16, 2013*

**math**

Is it 7.98 x2 x4.2 /1/2 =16.75?

*December 15, 2013*

**math**

The area of a triangle is 3.99cm2 . If the base is 4.2 cm, how do you find the height ?

*December 15, 2013*

**Science help, Ms.Sue**

I am also from conections. It is against the school propertys to use outside properties other than what is provided when doing a test.

*December 14, 2013*

**science very urgent help?**

Susan has heard that taking an over-the-counter ‘energy’ pill, which contains as much caffeine as a strong cup of coffee, makes people feel alert and ‘speedy’. She wonders if taking this pill will make a difference to the reaction times of people doing an ...

*December 13, 2013*

**math**

Tom has 58 cards

*December 12, 2013*

**math**

Tom and Max have 72 football cards.Tom has 2 more than 4 times as many cards as Max has. How many football cards does Tom have?

*December 12, 2013*

**Geography**

They sailed...(double post ;))

*December 11, 2013*

**Social Studies (History)**

Just google search it, @Nicole, it's not that hard honestly...

*December 11, 2013*

**math**

Yeah what Steve said

*December 11, 2013*

**math**

For the first one: if you have to, just list em all out Mugs: 6,12,18,24,30,36,42,48,54,60.... Shirts: 14,28,42,56,70.... See any numbers in common so far? Yep: the 42. So the 42nd guest will get both Second one: Can't figure it out, cuz not enough information, did you ...

*December 11, 2013*

**Math - Precalculus - Parametric Equations/Geometry**

Thanks, but I was wondering how you got the horizontal and vertical speeds, sorry I'm not that good at parametric equations yet :( Also how did you get that the angular velocity is 3*2pi / s? Thanks

*December 11, 2013*

**Math - Precalculus - Parametric Equations/Geometry**

A hockey puck of diameter 3 inches is spinning around its center at a speed of 3 counterclockwise rotations per second. The center of the puck is traveling at a speed of 24 inches per second at an angle of 45 degrees to the positive real axis. (a) At time t=0, the center of ...

*December 11, 2013*

**math**

If you buy one ticket you have a 1/2500 chance of winning. Thus, you're expected value is 5000/25$ = 2$ return for your 5$ ticket. So you get -$3.

*December 11, 2013*

**College Algebra**

C * x = C x = C/C C/C = 1 x = 1

*December 11, 2013*

**College Algebra**

slope = y2 - y1 / (x2-x1) = 7/5 perpendicular = -1/m so we have -5/7

*December 11, 2013*

**College Algebra**

Erm....? *I found them!* They're in the 3rd row before the = signs. Seriously though, I don't get what you're asking...

*December 11, 2013*

**math**

adult ticket = 3 * child ticket adult + child = 36 substitute in: 3 child ticket + child ticket = 36 4 child ticket = 36 child ticket = 9

*December 11, 2013*

**algebra**

ax^2 + bx + c = 1 plug in first value 4a -2b + c = 1 do the same for the others: 0 + 0 + c = 5 c = 5 16a + 4b + c = -59 so we plug in c into the equations with and b: 16a + 4b + 5 = -59 4a -2b + 5 = 1 4a = 2b -4 2a = b - 2 16a + 4b = -64 8(b-2) + 4b = -64 2(b-2) + b = -16 2b...

*December 11, 2013*

**Math, HELP!**

A concert venue sold 1425 tickets one evening. Tickets cost $40.00 for a covered pavilion seat and $30.00 for a lawn seat. Total receipts were $48,000.00. How many of each type of ticket were sold?

*December 10, 2013*

**math**

Thank you. I was going crazy trying to figure it out.Thank you for all your help in math

*December 10, 2013*

**math**

sorry i just don't get it.

*December 10, 2013*

**math**

Started with 125.87 -40 =85.87

*December 10, 2013*

**math**

IS IT 85.87 +40.00 =125.87 -22.25 =103.62 +22.25. so is it103.62?

*December 10, 2013*

**math**

This morning Tom deposited 22.25 in his bank account. At lunchtime he withdrew 40.00 and he found out that he had a balance of 85.87. What was his balance at the start of the day?

*December 10, 2013*

**math**

72 is what percent of 480? Write an equation.

*December 10, 2013*

**math**

15/23.25= x/100 then you cross multiply?

*December 10, 2013*

**math**

Estimate a 15% tip on a taxi ride that cost 23.25.

*December 10, 2013*

**math**

thank you!

*December 10, 2013*

**math**

36*108=3888 divided by 100=38.88?

*December 10, 2013*

**math**

108 is 36% of what number? Write and solve a proportion.

*December 10, 2013*

**math**

It is B.

*December 10, 2013*

**math**

What percent of 94 is 23? A.n/94=23/100 B.23/94=n/100 C.94/n=23/100 D.23/94=100/n

*December 10, 2013*

**math**

What number is 73% of 215? A.215=0.73n B.n=0.73*215 C.0.73=n*215 D.215=73n

*December 10, 2013*

**Algebra2**

srry :(

*December 10, 2013*

**Algebra2**

minus the first from the 3rd equation we get 3x-3x + 2y-2y + 3z -z = 7-1 2z = 6 z = 3 plug into the 2nd equation to get 5x+5y = 3-12 = -9 plug into the first equation to get 3x+2y = 4 Multiply the 2nd equation by 2 and the 1st by 5 10x+10y = -18 15x+10y = 20 minus first from ...

*December 10, 2013*

**Parametric equations/Trigonometry - Lattice points**

Thanks, but why is it a triangle and not a line I graphed it and it is a line do I have to connect the ends and stuff?

*December 10, 2013*

**Parametric equations/Trigonometry - Lattice points**

A lattice point is a point with integer coordinates. How many lattice points (x,y) with -100 less than or equal to x less than or equal to 100 and -100 less than or equal to y less than or equal to 100 are on the graph of the parametric equations x=30-40 cos t y=-50 + 30 cos t...

*December 10, 2013*

**Geometry**

volume = w * h * l surface area = 2wh + 2lh + 2wl So find something with dimensions that multiply up to the same number but the surface area is different, for example if w = 1 h = 2 l = 8 compared with w= 1 h = 4 l = 4 It would give different surface areas 4 + 32 + 16 8 + 8 + 32

*December 10, 2013*

**Trigonometry**

ww w . wolframalpha . c om

*December 10, 2013*

**Chemistry**

I have a similar question and I got 1.7x10^-8 but would we have to multiply this value by 2?

*December 9, 2013*

**English**

I suppose so, if she meant a journal entry, you should probably write it as a journal entry.

*December 9, 2013*

**science**

P = W(joules)/t(time in sec) 120J / 5 seconds = ?

*December 9, 2013*

**Language Arts**

? @ zamaya @ sandy, we were given no info, no story...

*December 9, 2013*

**Astronomy**

Erm...I don't think we're going to solve all these problems for you you need to at least make some effort

*December 9, 2013*

**Algebra 1b!**

what do yo think for each problem?

*December 9, 2013*

**Geometry**

2.5 * 4.6 * x = 172.5 x = 15 surface area = 2 * wh + 2*wl + 2*hl 2.5 * 4.6 * 2 + 2*2.5 * 15 + 2*4.6*15 =?

*December 9, 2013*

**Math**

Erm...no....it can't.

*December 9, 2013*

**math**

0.205 * 7700 = ?

*December 9, 2013*