Sunday

December 11, 2016
Total # Posts: 236

**Physics **

2. A ham sandwich consists of one slice of ham (7grams) and two slices of bread (25 grams each). You have 1kg of ham and 1kg of bread. You make as many as you can. How many sandwiches did you make? What is the mass of the sandwiches? What is the mass of the ingredients that is...

*November 28, 2016*

**Physics **

1.Given that 1g of hydrogen combines completely with 8g of oxygen to form water, how much water can you make with 9g of hydrogen and 32g of oxygen?

*November 28, 2016*

**Physics **

A wheel accelerates from rest to 59 rad/s at a rate of 58 rad/s^2 What is the angular displacement of the wheel??? A) 24 rad B) 38 rad C) 30 rad

*November 18, 2016*

**Physics **

You exert a force of 26 N on the head of a thumbtack. the head of the thumbtack has a radius of 7 mm.? What is the pressure on your thumb? -------- atm

*November 15, 2016*

**Physics **

Three liters of nitrogen combine with 9 L of hydrogen to form 6 L of ammonia. If the molecules of nitrogen and hydrogen have two atoms each, how many atoms of hydrogen and nitrogen are there in one molecule of ammonia? ____ atoms of hydrogen ____ atoms of nitrogen

*November 7, 2016*

**physics**

An ideal gas has the following initial conditions: Vi = 490 cm3, Pi = 5 atm, and Ti = 100°C. What is its final temperature if the pressure is reduced to 1 atm and the volume expands to 1000 cm3? ______ °C

*November 6, 2016*

**physics**

Three liters of nitrogen combine with 9 L of hydrogen to form 6 L of ammonia. If the molecules of nitrogen and hydrogen have two atoms each, how many atoms of hydrogen and nitrogen are there in one molecule of ammonia? ____ atoms of hydrogen ____ atoms of nitrogen

*November 6, 2016*

**physics**

A cube of ice, 28 cm on each side, is melted into a measuring cup. What is the volume of the liquid water? ------cm3

*November 5, 2016*

**physics**

A solid ball with a volume of 0.1 m3 is made of a material with a density of 2800 kg/m3. What is the mass of the ball? -----kg

*November 5, 2016*

**physics**

An ideal gas has the following initial conditions: Vi = 490 cm3, Pi = 5 atm, and Ti = 100°C. What is its final temperature if the pressure is reduced to 1 atm and the volume expands to 1000 cm3? -----°C

*November 4, 2016*

**physics**

A 3 kg block (block A) is released from rest at the top of a 20 m long frictionless ramp that is 5 m high. At the same time, an identical block (block B) is released next to the ramp so that it drops straight down the same 5 m. Find the values for each of the following for the...

*November 2, 2016*

**physics**

A 1200 kg car traveling north at 14 m/s is rear ended by a 2000 kg truck traveling at 25 m/s. If the truck and car lock bumpers and stick together, what is their speed immediately after the collision?

*November 2, 2016*

**physics**

An ideal gas has the following initial conditions: Vi = 490 cm3, Pi = 5 atm, and Ti = 100°C. What is its final temperature if the pressure is reduced to 1 atm and the volume expands to 1000 cm3? _____°C

*November 2, 2016*

**physics**

The pressure in each of your car tires is 2.10 105 Pa. The mass of your car is 1550 kg. Assuming that each of your tires bears one-quarter of the total load, what is the contact area of each tire with the road? ______ m2

*November 2, 2016*

**physics**

If the rotational speed of a CD changes from 550 rpm to 200 rpm as it plays 30 minutes of music, what is the CD's average rotational acceleration?

*October 27, 2016*

**physics**

If a hair dryer is rated at 900 W, how much energy does it require in 5 minutes?

*October 25, 2016*

**physics**

3 kg block (block A) is released from rest at the top of a 20 m long frictionless ramp that is 5 m high. At the same time, an identical block (block B) is released next to the ramp so that it drops straight down the same 5 m. Find the values for each of the following for the ...

*October 25, 2016*

**Chemistry**

The principal quantum number (n): A) specifies the subshell of the orbital. B) specifies the principal shell of the orbital. C) specifies the 3-D shape of the orbital. D) specifies the maximum number of electrons. E) none of the above

*October 21, 2016*

**Chemistry**

DrBob222 Please let me know if this is correct N2 + 3 H2 → 2 NH3 (1.0 g N2) / (28.01344 g N2/mol) = 0.03570 mol N2 (1.0 g H2) / (2.01588 g H2/mol) = 0.4961 mol H2 0.03570 mole of N2 would react completely with 0.03570 x (3/1) = 0.1071 mole of H2, but there is more H2 ...

*October 19, 2016*

**Chemistry**

What is the maximum mass, in grams, of NH3 that can be produced by the reaction of 1.0 g of N2 and 1.0 g of H2 using the reaction below? N2+H2→NH3 (not balanced) A) 0.60 g B) 5.7 g C) 1.2 g D) 2.9 g

*October 19, 2016*

**Chemistry**

What is the maximum mass, in grams, of NH3 that can be produced by the reaction of 1.0 g of N2 and 1.0 g of H2 using the reaction below? N2+H2→NH3 (not balanced) What is the maximum mass, in grams, of that can be produced by the reaction of 1.0 g of and 1.0 g of using ...

*October 19, 2016*

**Physics **

Two identical boxcars (m = 14866 kg) are traveling along the same track but in opposite directions. Both boxcars have a speed of 5 m/s. If the cars collide and couple together, what will be the final speed of the pair?

*October 18, 2016*

**physics**

Two identical boxcars (m = 14866 kg) are traveling along the same track but in opposite directions. Both boxcars have a speed of 5 m/s. If the cars collide and couple together, what will be the final speed of the pair?

*October 18, 2016*

**physics**

If the momentum of one object changes in a system that is subject to no net external force, what else must happen? 1) Collisions with other objects will change its momentum back. 2) The momenta of the other objects in that system change in the same way. 3) The momenta of the ...

*October 18, 2016*

**Math**

A rectangle is 2.8 meters wide and 3.5 meters long. What is the area?

*October 12, 2016*

**physics**

What is the acceleration due to gravity at a distance of one Earth radius above the Earth's surface

*October 8, 2016*

**Chemistry**

Classify the following reactions as precipitation reactions, oxidation-reduction reactions, or acid-base reactions. 1)2NaCl(aq)+K2H2Sb2O7(aq)==Na2H2SbO7(s)+2KCl(aq) 2)(CH3COO)2Cu(aq)+(NH4)2C2O4(aq)==CuC2O4(s)+2CH3COONH4(aq) 3)4Al(s)+3O2(g)==2Al2O3(s) 4)2Zn(s)+O2(g)==2ZnO(s) 5)...

*October 4, 2016*

**physics**

What happens to centripetal force when speed decreases, in the special case that the object continues moving in a circle of the same radius? A) The radius cannot stay the same. B) The force also decreases. C) The force increases. D) Speed does not affect centripetal force. E) ...

*October 2, 2016*

**algebra 1**

write an algebraic expression for each verbal expression. Then write a real-world situation that could be modeled by the expression. 10 more than y

*September 8, 2016*

**Math**

45

*May 18, 2016*

**Math **

An ice cream shop offers 5 different flavors of ice cream and 9 different toppings. How many choices are possible for a single serving of ice cream with one topping?

*May 18, 2016*

**Pre-Calculus**

Find the equation in standard form for the hyperbola that satisfies the given conditions: transverse axis endpoints (-2,-2) and (-2,7), slope of one asymptote 4/3. I found the distance of the transverse axis to be 9. For the formula, I have a=9/2. I need help finding h, k, and...

*May 16, 2016*

**Pre-Calculus **

Find the equation in standard form for the hyperbola that satisfies the given conditions: transverse axis has endpoints (5,3) and (-7, 3) and conjugate axis has a length of 10. I found the distance of the transverse axis to be 12. For the formula, I have a=6 b=5. I just need ...

*May 16, 2016*

**science**

A loaf of bread weighs 1,362 g. The weight in kilograms is Select one: a. 1,362 kg. b. 0.01362 kg. c. 0.1362 kg. d. 1.362 kg. Next

*February 1, 2016*

**Social Studies**

I was also wondering if you could give me a paragraph reflection so i can get an idea of how i should write mine .

*December 28, 2015*

**Social Studies**

Thank You! :-) :) !)

*December 28, 2015*

**Social Studies**

PLEASE GIVE ME YOUR REFLECTION ON THIS ARTICLE!!!! THANK YOU!!!! Nations agree to protect the high seas from overfishing Environmentalists celebrated last month after the United Nations finally agreed that the high seas need protection. The high seas, which lay beyond a ...

*December 28, 2015*

**history**

What reason was given by the federalists to support the constitution? Is it that the united states needed a strong government to establish economic stability, to maintain control over all its states, to define state boundaries, or in order to pass laws to bring law and order ...

*December 12, 2015*

**Social Studies**

THANK YOU SO MUCH FOR HELPING ME OUT! I REALLY APPRECIATE IT! :-)

*December 9, 2015*

**Social Studies**

A summary of "The Berlin Wall" aswell.... Thank You :-)

*December 9, 2015*

**Social Studies**

Can you please summarize what the "Colombian Exchange" is?

*December 9, 2015*

**precal**

I'm not sure if this is a half angle identity because the cubes throw me off

*November 25, 2015*

**Trigg**

This one is throwing me off, I don't get how to do a identity equaling to -.3 Cos2x=-.3

*November 25, 2015*

**Chemistry**

b)

*November 24, 2015*

**Physics **

an airplane flies sue west at 185 km/h with respect to the air. there is a wind blowing at 85 km/h to the northeast relative to the ground. what is the planes speed and direction with respect to the ground answers. // our class is literally stuck in this and our teacher isn&#...

*September 23, 2015*

**Science**

If you lift a 15 °C unsaturated air bubble from the surface to 1 km height, what would be its final air temperature?

*April 21, 2015*

**Science**

If you lift a 15 °C air bubble from the surface to 1 km height and the environmental temperature at 1 km is 10 °C, what stability does the atmosphere demonstrate at this level?

*April 21, 2015*

**English**

"Was that (she, her) on the patio?" I think her?

*March 22, 2015*

**maths**

The difference between 2 positive numbers, x and y where x > y, is 7 and the sum of their squares is 137. By forming 2 equations in x and y, find the product of these 2 numbers.

*March 18, 2015*

**Physics**

A 45.0 g ball of copper has a net charge of 2.3 µC. What fraction of the copper's electrons have been removed? (Each copper atom has 29 protons, and copper has an atomic mass of 63.5.)

*February 7, 2015*

**ELA**

Ahhh, i am soo sorryy yess!! ______________________ My brother scout group had a fair. (singular)

*October 27, 2014*

**ELA**

oh sorry, let me check..

*October 27, 2014*

**ELA**

Mrs. Sue ??

*October 27, 2014*

**ELA**

thank you , so for My brother scout had a fair. (singular) -------------------------------------- brother's?

*October 27, 2014*

**ELA**

Correct the possessive nouns. The sisters-in-law potluck was a sucess. (plural) Carlos dog ran home. (singular)

*October 27, 2014*

**Health**

Intestine just like what Frankenstein said ;)

*October 23, 2014*

**ela**

Underline the appositive in each sentence. Circle the noun it describes. 3.Genes, sections of DNA, govern all of life's processes. 4. Each gene, the structural unit of inheritance, is a segment of a DNA molecule with a specific purpose. Thanks everyone. I need all the help...

*October 22, 2014*

**Math**

4X^2+4y^2-8X-20y+13=0

*October 5, 2014*

**Science(Magnets)**

:) D.

*September 20, 2014*

**P.E**

that is right :)

*September 19, 2014*

**Math**

Thank you so much.

*September 1, 2014*

**Math **

Brandy plans to frame a picture with a sheet of construction paper. Her picture is 8 inches wide and 13 inches long. She wants the frame to extend 1 inch beyond the picture on all sides l. How wide and long should the frame be? What is the perimeter of her picture and of the ...

*September 1, 2014*

**Math**

While getting dressed for school early one morning, the light in Toni's bedroom burned out. Toni knew he had plenty of clean socks in his drawer, but none of them were matched. He had 24 white socks and 6 blue socks. What is the probabilty of Toni finding 2 white socks or ...

*September 1, 2014*

**geometry**

name a pair of obtuse adjacent angles

*April 23, 2014*

**3rd grade math**

Divisor

*April 8, 2014*

**Math**

you have a job assembling tables and chairs. you are paid $30 for each chair and $70 for each table. last week you assembled a total of 14 items and make $660. how many did you make of each?

*March 16, 2014*

**Math help**

a $6000 principal earns 8% interest compounded semi annually after 35 years what is the balance

*February 5, 2014*

**Math**

Please show me how to solve 32 yd/min = __ in./s

*January 28, 2014*

**Help please math**

Solve using substitution. y = x – 2 x + y = 10 7x + 2y = - 8 8y = 4x Solve using elimination. 2x + 3y = 12 2x – y = 4 5x – 2y = - 19 2x + 3y = 0

*January 10, 2014*

**Statistics**

A state survey investigates whether the proportion of 8% for employees who commute by car to work is higher than it was five years ago. A test on employee commuting by car was done on a random sample size of 1000 and found 100 commuters by car. Test an appropriate hypothesis ...

*November 11, 2013*

**Statistics**

When consumers apply for credit, their credit is rated using the FICO score. A bank manager used a random sample of the credit scores of 18 customers and determined the following 95% confidence interval: (613.6, 708.0) If the sample used 45 customers rather than 18 customers, ...

*November 6, 2013*

**Statistics**

A scientist in Smallville tested the cholesterol of a random sample of 35 town residents. He constructed the following confidence interval: t-interval for μ: with 99.00% Confidence: 188 < μ(Cholesterol) < 206 What is the margin of error? A) 18 B) 9 C) 1.09 D) ...

*November 6, 2013*

**Statistics**

Politicians are interested in knowing the opinions of their constituents on important issues. One administrative assistant to a senator claims that more than 63% of adult women favor stricter gun laws. A recent telephone survey of 1026 adults by IBR Polls found that 65.9% of ...

*November 3, 2013*

**Statistics**

A skeptical paranormal researcher claims that the proportion of Americans that have seen a UFO is less than 5%. the type of alternative hypothesis is: left-tailed right-tailed or two-tailed Is this right-tailed?

*November 3, 2013*

**Statistics**

Politicians are interested in knowing the opinions of their constituents on important issues. One administrative assistant to a senator claims that more than 63% of adult women favor stricter gun laws. A recent telephone survey of 1026 adult women by IBR Polls found that 65.9...

*November 3, 2013*

**Statistics**

Politicians are interested in knowing the opinions of their constituents on important issues. One administrative assistant to a senator claims that more than 63% of adult women favor stricter gun laws. A recent telephone survey of 1026 adults by IBR Polls found that 65.9% of ...

*November 3, 2013*

**Chemistry**

Thanks for replying. No, this isn't a pure sample of KClO3. The mixture is 90% KClO3 and 10% MnO4 (catalyst) for the decomposition of KClO3. I understood most of what you said but you lost me at the part where you talked about using the gram sample and converting it to ...

*October 20, 2013*

**Chemistry**

Hi, I'm doing a chem lab of the Percent Composition of Potassium Chlorate-A Gas Law Experiment and we need to calculate the percent of KClO3 in the sample volumetrically and gravimetrically. I need help calculating the Volumetric percent of KClO3 in sample given the ...

*October 20, 2013*

**chemistry**

A 1.213g sample of an unknown weak monoprotic acid was titrated to the endpoint with 27.25mL of a 0.3016M NaOH Calculate: -the number of moles of base reacted. -the number of moles of acid originally present. -the molar mass of the acid.

*October 11, 2013*

**statistics **

A new medication has been created to treat osteo-arthritis inflammation and pain. Doctors prescribing the drug claim that the drug is not as effective for women as men since women taking the medication have higher pain levels than men. The pharmaceutical company conducts a ...

*July 3, 2013*

**statistics **

Randomly selected cans of Coke are measured for the amount of cola in ounces. The sample values listed below have a mean of 12.18 ounces and a standard deviation of 0.118 ounces. Use DataDesk to find a 99% confidence interval for the mean volume of Coke in cans. Show the upper...

*June 28, 2013*

**statistics **

Politicians are interested in knowing the opinions of their constituents on important issues. One administrative assistant to a senator claims that more than 63% of adult women favor stricter gun laws. A recent telephone survey of 1026 adults by IBR Polls found that 65.9% of ...

*June 27, 2013*

**English Coposition II**

D. Letters

*June 4, 2013*

**Algebra**

Solving equations simultaneously: .7*x+.30*y=33.1 (x*y)/(.7*y+.30*x) = 3.66 I get stuck after I get 51.972=45.2y-.42y^2 I know the answers are supposed to be x=2.6 and y=104

*May 3, 2013*

**Algebra**

Solving equations simultaneously: .7*x+.30*y=33.1 (x*y)/(.7*y+.30*x) = 3.66 I get stuck after I get 51.972=45.2y-.42y^2 I know the answers are supposed to be x=2.6 and y=104

*May 3, 2013*

**Trig**

Verify that each trigometric equation is an identity. 1/1-sinx + 1/1+sinx = 2 sec^2x

*March 31, 2013*

**Chemistry**

Find the pH: 1) A 0.001M solution of HCl 2) A 7.98 x 10^-2 M solution of HNO3 3) 1098L of a solution containing 8.543moles of HBr 4) 120mL of a solution containing 0.005 grams of hydrochloric acid. Please help me with these four. Out of 20 questions i only didn't ...

*March 20, 2013*

**Trig**

A pulley with a diameter of 24 inches is driven by a belt which is moving 1045 ft/min. How many revolutions per minute are made by the pulley?

*March 19, 2013*

**Trigonometry**

A car wheel has a 13-inch radius. Through what angle does the wheel turn when the car rolls forward 4 ft?

*March 19, 2013*

**Trigonometry**

A bicycle with a 26-inch wheel(diameter) travels a distance of 700 feet. How many revolutions does the wheel make?

*March 19, 2013*

**Trigonometry**

A pendulum of length 17.6 inches swing 1 degree and 5 minutes to each side of its vertical posisition. To the nearest hundreth of an inch, what is the length of the arc through which the end of the pendulum swings?

*March 19, 2013*

**Trigonometry**

Two wheels are rotating in such a way that the rotation of the smaller wheel causes the larger wheel to rotate. The radius of the smaller wheel is 4.4 centimeters and the radius of the larger wheel is 20.9 centimeters. Through how many degrees wil the larger wheel rotate if ...

*March 19, 2013*

**math**

A sensor light can detect motion for a distance of 70ft. with a range of motion of 189 degrees. Over what area will the sensor detect motion and become illuminated?

*March 19, 2013*

**math**

A pendulum swings through an angle of 14 degrees each second. If the pendulum is 17cm in length and the complete swing from right to left lasts 3 seconds, what area is covered by each complete swing?

*March 19, 2013*

**math**

Find the area of a parallelogram with base b and height h. b = 82 cm h = 16.6 cm .1,361.2 cm2 .6,724 cm2 .137.78 cm2 .98.6 cm2

*February 28, 2013*

**Algebra**

simplify 9to 6th power times 3 to the 7th power all over 9 to the 8th power times 3 to the 6th power

*February 10, 2013*

**AP Chemistry**

Calculate delta H fro the following equation: H20(l, 50.0 C) yields H20(s, -10.0 C)

*January 23, 2013*

**AP Chemistry**

The solubility of sodium nitrate is 32 grams in 50.0 grams of water at 60 degrees C. If 60 grams of potassium nitrate are mixed with 50.0 grams of water, determine the percentage of sodium nitrate that remains undissolved.

*January 23, 2013*

**AP Chemistry**

The solubility of sodium nitrate is 32 grams in 50.0 grams of water at 60 degrees C. If 60 grams of potassium nitrate are mixed with 50.0 grams of water, determine the percentage of sodium nitrate that remains undissolved.

*January 23, 2013*