Wednesday

April 16, 2014

April 16, 2014

Total # Posts: 858

**Physics Calculation**

The weight of an apple near the surface of the earth is 1N. What is the weight of Earth in the gravitational field of the apple?

**physics**

i need to build a roller coaster, we can't use tubing to carry the ball so any ideas on what to use for the track? i was thinking no. 6 copper wire? i need to have 2 hills and a loop. how does this sound? 28" drop into a teardrop loop 12" high and back up hill #2...

**science**

i need to build a roller coaster but we can use tubing?? what can i use for a track

**chemistry**

SiH3- planar or pyramidal geometric shape?

**College Chemistry**

H2C=C=CH2 molecule is linear, what are they hybridization states of the carbon atoms? draw diagrams to show sigma and pi bonds.

**Chemistry**

Here's is what I did: Collect water samples from Farm Lane bridge (500 mL minimum)þ Filter water samples using small mesh filter Note: Weigh the dried filter before filtration! Dry the filter in drying oven (~24 hours)þ Weigh the filter after drying. Day Initia...

**Chemistry**

Here's is what I did: Collect water samples from Farm Lane bridge (500 mL minimum)þ Filter water samples using small mesh filter Note: Weigh the dried filter before filtration! Dry the filter in drying oven (~24 hours)þ Weigh the filter after drying. Day Initia...

**Chemistry**

Here's is what I did: Collect water samples from Farm Lane bridge (500 mL minimum)þ Filter water samples using small mesh filter Note: Weigh the dried filter before filtration! Dry the filter in drying oven (~24 hours)þ Weigh the filter after drying. Do I measu...

**Chemistry**

Please give me the formula for measuring turbidity. I already know about the wikipedia defintion and explanation. Thanks

**Chemistry**

Thanks, but I already knew about this.

**Chemistry**

What is the formula for measuring turbidity?

**Earth Science**

My experiment was to measure the float of a tongue depressor down a river. The mins it took the tongue depressor to float from point A to B and the depth of the river on those days. The meter represnt how depth/wide that point of the river was on that day. This is the raw data...

**Earth Science**

How do I ocnvert meters into cubic meters? For example: measuring areas and velocity I come up with this: area 1.55m x 27.47 = 42.74 velocity 21.9/172 seconds = 0.123 area x velocity = 5.22381 How do I convert 5.22381 into cms?

**Earth Science**

Ms. Sue, I coverted the minutes into seconds and here is what I got: April 4 172 April 5 160 April 6 126 April 11 77 April 12 59 April 13 70

**Earth Science**

This is the raw data we got from the river: The mins it took the tongue depressor to float from point a to b and the depth of the river on those days. Using area x velocity, I need to calculate the discharge results for the following dates: April 4 2:52 mins 1.55 meters April ...

**Earth Science**

It is 2 minutes a 52 seconds.

**Earth Science**

I need to calculate the discharge results for the following dates: April 4 2:52 mins 1.55 meters 5 2:40 1.63m 6 2:06 1.7m 11 1:17 1.86m 12 :59 1.82m 13 1:10 1.8m Please help me.

**Physics**

i think the answer is big breasts

**Math**

compound and interest Using the below values please calculate the amount accumulated (future value) *Initial principal=$2000 *Interest Rate=9% *Number of years 7 *Monthly compounding

**history**

What does concessions mean in the following paragraph? What were the concessions? The leader of the Czech Nazi Party, Konrad Henlein, was urged by Hitler to demand that the Czech government make concessions to the Sudeten Germans. Henlein kept the pressure on the Czechs by ask...

**Chemistry**

I'm actually not sure how to do any of it.

**Chemistry**

A 50.0 mL sample of 0.12 M formic acid, HCOOH, a weak monoprotic acid, is titrated with 0.12 M NaOH. Calculate the pH at the following points in the titration. Ka of HCOOH = 1.8 multiplied by 10-4. What is the pH when 50.0 mL NaOH is added 60.0 mL NaOH is added 70.0 mL NaOH is...

**Chemistry**

A 50.0 mL sample of 0.23 M propanoic acid, CH3CH2COOH, a weak monoprotic acid, is titrated with 0.14 M KOH. Ka of CH3CH2COOH = 1.4 multiplied by 10-5. What is the pH at equivalence point?

**Chemistry**

thanks!

**Chemistry**

The Ka values of H3PO4 are shown below. Ka1 7.5 multiplied by 10-3 Ka2 6.2 multiplied by 10-8 Ka3 4.8 multiplied by 10-13 What is the pH of a 0.14 M solution of Na2HPO4?

**Chemistry**

A 22.3 mL sample of a weak monoprotic acid, HX, requires 50.0 mL of 0.040 M NaOH to reach the equivalence point. After the addition of 30.0 mL of NaOH, the pH is 5.30. What is the Ka of HX?

**Chemistry**

A solution is prepared by dissolving 130 g of NaNO3 in 100 g of water at 80°C. The solution is cooled to 0°C. How many grams of compound remain in solution? How many grams of solid are formed?

**Algebra**

What is the remainder when the sum of the first 102 counting numbers is divided by 5250?

**home economics**

thank you

**home economics**

I have to make a cold dessert. I am thinking of making a trifle. I am not sure whether we will be able to heat the custard, can I use cold custard? Or is there something else I could use instead of custard. Any help would be good. Many thanks.

**Chemistry**

What is the chemical formula for this compound? sodium diamminetetrachloroplatinate(IV)

**chemistry**

What raw materials are used to make lithium ion batteries? How are the raw materials used in the batteries processed? What chemical equations take place in the battery?

**english (for Sra) repost**

Thankyou very much. Much appreciated :). George.

**english (for Sra) repost**

The Lady of Shalott I have two events and have to find the quotation. 1st event The handsome, dazzling figure of Sir Lancelot rides by in his shining armour. The Lady sees him in the mirror and can no longer bear her imprisonment. 2nd event The Lady floats down the river past ...

**english (Sra)**

I have to find the quotation for two events. 1st event The handsome, dazzling figure of Sir Lancelot rides by in his shining armour. The Lady sees him in the mirror and can no longer bear her imprisonment. 2nd event The Lady floats down the river past Camelot in a boat with he...

**english (Sra)**

Should I be looking at the words mirror or dazzling in the event to find the answer or should I be thinking of Lancelot as he rode down to Camelot. I am getting a bit confused. With the next one I am not sure whether I should be looking at the words name on boat, floated by, o...

**english**

The Lady of Shalott I have an event and have to find the quotation. 1) The handsome, dazzling figure of Sir Lancelot rides by in his shining armour. The Lady sees him in the mirror and can no longer bear her imprisonment. The quotation I think it is, is: A bow-shot from bower-...

**physic**

it eats cheese for a living

**physics**

well, the answer is simple. it is one.

**statistics**

im so confused! please help! 3. A car manufacturer is interested in conducting a study to estimate the mean stopping distance for a new type of brakes when used in a car that is traveling at 60 miles per hour. These new brakes will be installed on cars of the same model and th...

**algebra**

Evaluate each logarithm. 3 to the 2nd power x plus five equals 9x plus 1. I can't seem to type the actual problem, which is why I wrote it out. I hope I wrote the problem right.

**algebra**

Find the number of square units in the area of the region in the first quadrant which is bounded by x = 4, the y-axis, y = 2 , and y = 8.

**Physics**

In an experiment using sodium light (λ=589 nm), the slits are 1.2 μm wide. You notice that every fourth fringes missing. a) What is the slit separation? b) How many fringes appear on the screen?

**physics**

12.2

**Physics**

I tried it but the answer is still wrong =/. I'm not so sure if this has something to do with the other equation n = c/v but I doubt it.

**Physics**

A tube with a length L is closed at both ends and is filled with air. The wavelength of the fundamental mode of this tube is given by L*c, where c is a dimensionless constant. What is this constant, c, numerically? Also, the frequency of the first overture is how many times th...

**Algebra 1-Matrix**

I think you should do the work yourself and quit relying on other people to do it for you.

**math**

i dont know what to do can you help me

**math**

4x-4y=1

**math**

i guess you need help aswell

**math**

-23 yes

**math**

it says i got it wrong

**math**

so far i have. 32x + 64 + x = -x + 9 +x

**math**

8(-4+8)=11-(x+2)

**Physics**

A 14.0 ohm resistor is made from a coil of copper wire whose total mass is 23.0 g. What is the diameter of the wire, and how long is it?

**Decision Analysis**

Kunfu Company is planning to build a new manufacturing and distribution facility in TT, KK, SS, CC or AA. The company has estimated the facility cost in each country will vary depending on the economic conditions prevailing. The table below provides the cost under three differ...

**Quantitative analysis**

3. A service station owner sells Firm-on-the-road tyres which are ordered from a local tyre distributor. The distributor receives tyres from two plants, A and B. When the owner of the service station receives an order from the distributor, there is a 0.5 probability that the o...

**geometry**

x=4

**related rate problem**

A railroad track and a road cross at a right angle. An observer stands on the road 70 meters south of the crossing and watches an eastbound train traveling at 60 meters per second. At how many meters per second is the train moving away from the observer 4 seconds after it pass...

**math**

The half life of iodine - 131 is 8 days. How long will it take for 7/8 of the sample to decay?

**physics**

I had completed the problem correctly until when finding I for a solid disk I used 1/4 instead of 1/2. Thank you

**physics**

A solid disk pulley of mass 2.00 kg and a radius of 30.0 cm is rotated by a block mass of 0.500 kg falling from rest, a distance of 4.00 m. What is the mass's acceleration and how much time elapses during its fall?

**Physics**

The question is worded incorrectly. So to further explain: there are two inclines, the bottom ends of both inclines are touching, so that as the ball rolls to the bottom of the first incline, it immediately begins to rise up the second incline. You are supposed to assume that ...

**Physics**

A solid sphere at rest at the top 12.0 m inclined plane rolls down the incline. How high vertically does it rise of the other incline?

**Physics**

Can someone help me get started on this problem? A launcher fires a projectile with a velocity of 6.31m/s. Determine the horizontal distance of the projectile (in the air) at 5 degrees. Recalculate this distance at 10, 15, 20.... (5 degree increments) up to 90 degrees (at whic...

**Physics**

A super-hero is leaping from the roof of one building onto another. The first building is 120 meters high and the second building is 80 meters high. The horizontal velocity of the super-hero is 12.0 m/s. What is the maximum possible distance between buildings that the hero can...

**Physics**

A launcher fires a projectile with a velocity of 6.31m/s. Determine the horizontal distance of the projectile (in the air) at 5 degrees. Recalculate this distance at 10, 15, 20.... (5 degree increments) up to 90 degrees (at which point the horizontal distance will be zero). Gr...

**Physics**

You are the physics expert for a professional stuntman. The stunt you have designed includes a ramp that is angled at 30°. You expect that the stuntman will be traveling at 18.0 m/s when he leaves the ramp. How far must the landing ramp be positioned, and what is the maxim...

**Physics**

A launcher fires a projectile with a velocity of 6.31m/s. Determine the horizontal distance of the projectile (in the air) at 5 degrees. Recalculate this distance at 10, 15, 20.... (5 degree increments) up to 90 degrees (at which point the horizontal distance will be zero). Gr...

**Physics**

A bomber is flying at a velocity of 200.0 km/hr with an altitude of 1.5 km. How far (horizontally) from its intended target should the plane drop the bomb?

**Physics**

A super-hero is leaping from the roof of one building onto another. The first building is 120 meters high and the second building is 80 meters high. The horizontal velocity of the super-hero is 12.0 m/s. What is the maximum possible distance between buildings that the hero can...

**Physics**

A catapult throws a projectile at a 40.0° angle with a velocity of 26.0 m/s. How high will the projectile reach, and how far away will the projectile land?

**Math**

if you were listening in class you would know!!!!

**geometry**

i think in order to answer we need to know how these triangles are related. are they congruent?

**chem**

ok i see thanks

**math**

and sorry but how does it becom 1/5 i thought it would be 16/5 * 5/1

**math**

so when you * fractions you * both buttom and top all the time? and thank you

**math**

16over5 / 5 can you explan to me

**chemistry**

Rank the relative nucleophilicity of the indicated species in ethanol. CH3COOH CH3OH CH3COO- CH3S- CH3O- THANK YOU!

**Math Financa**

Stock in Country Road Industries has a beta of 0.8940. The market risk premium is 8.7 percent, and T-bills are currently yielding 4.8 percent. The company's most recent dividend was $1.8 per share, and dividends are expected to grow at a 5 percent annual rate indefinitely....

**Biology**

What are the conditions that should be kept constant when we are growing seeds? ex. The place of plant and etc?

**Computer Programing & Logic Design**

Design a flowchart using Visual Logic for the following: 1.A program that accepts a candy name (for example, “ chocolate-covered blueberries”), price per pound, and number of pounds sold in the average month, and displays the item’s data only if it is a best-sel...

**chemistry**

what state is sulfur dioxide in at 200 k Pa and -100 Celsius

**Downsizing and Fixed Costs **

Industry downsizing has been a major part of the corporate world, even government agencies are downsizing. GovernmentExecutive website "covers the business of the federal government and its huge departments and agencies - dozens of which dwarf the largest institutions in ...

**Direct Labor: Variable or Fixed Cost? **

Throughout the corporate world, businesses are transforming labor into a more flexible (and variable) cost. Among such companies are Hewlett-Packard, General Electric, DuPont, Sun Microsystems, and British Airways. Discuss whether direct labor is a fixed or a variable cost. Wh...

**physics**

What is the pressure acting on your body if you dive down to a depth of 3.4 m?

**physics**

i think the answer is deficate in my mouth

**Physics**

vertical drop S = ut+(1/2)gt² = 0 + (1/2)(9.8)*(3.1)^2 =47.089s How far from base 1.2m/s * 3.1s = 3.72m

**trig**

let sin theta = -7/25 with theta in QIV find sec (2theta)

**adult education**

Briefly describe the cookie production process. 2. What are two ways that the company has increased productivity? Why did increasing the length of the ovens result in a faster output? 3. Do you think that the company is making the right decision by not automating the packing ...

**chemistry **

Oh I see you answered that, So , it is incorrect to add 2H to balance H2 in a basic solution... ? Although all the first steps are the same as used in acidic solution?

**chemistry **

my question is about whether I have to add water or just H to firstly balance the second half reaction either 2e+2H2O--->H2+2OH OR 2e+2H-->H2 which one is correct for a basic solution reaction ? thanks a lot

**chemistry **

In the REDOX reaction in basic solution Zn-->Zn(OH)4+H2 I know that the first half reaction is 4H20+Zn-->Zn(OH)4 +4H+e but the second one is either 2e+2H2O--->H2+2OH (WHICH IS THE ANSWER GIVEN ON THE WORKSHEET) OR 2e+2H-->H2 I think both leads to the same answer= 2...

**algebra**

28=2h-18

**math**

*-2 +1

**algebra**

Can someone please help-I need to do this today. All I need is the method and answer.

**algebra**

Ans also I got this far for the first part's method 4x^2-7x+3= 4x^2-3x-4x+3= x(4x-3)-1(4x+3) but there is nothing similar-how did you get (4x-3) for both of them.

**algebra**

Thanks,can you tell me the answer to the second one.

**algebra**

Factorise 4x^2-7x+3= and 6x^2+10x-5= Thanks Method would be good-as I am stuck.

**Physics**

What is the force necessary to accelerate an object with a mass of 115 kg and and an acceleration of 6 m/s2 (squared) east?

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