Friday

April 25, 2014

April 25, 2014

Total # Posts: 70

**chemistry**

Determine ΔSuniv for the following equation: Ca2+ (aq) + SO42- (aq) → CaSO4 (s)

**physics**

What linear speed must a 4.0×10−2kg hula hoop have if its total kinetic energy is to be 0.20J ? Assume the hoop rolls on the ground without slipping.

**COMMON CORE MATH**

SIMPLIFY THE EXPRESSION 12R + 5 + 3R - 5

**COMMON CORE MATH**

SIMPLIFY THIS EXPRESSION -6K + 7K

**MATH:( Base systems?!**

2. Determine the base- five representations for each of the given numbers. Remember that a numeral with no subscript is understood to be n base ten. a.47 b. 179 c. 354

**math**

Can someone help me with this question i've spent hours on it!!:( 6. Eight square tiles are laid out on a table so that they make a solid pattern. Each tile must touch at least one other tile along an entire edge. The squares all have sides of length 1. Here is an example:...

**algebra**

t can not equal positive 6.

**Chemistry**

Determine the partial pressure of oxygen collected by water displacement if the water temperature is 20.0 ◦ C and the total pressure of the gases in the collection bottle is 760 torr. PH2O at 20.0 ◦ C is equal to 17.5 torr.

**Physics**

A compact 60-kg object is attached to one end of horizontal 40-kg uniform steel tube 2.4m long. What is the distance from the loaded end to the center of gravity of the object-tube system?

**Physics**

When a mass of 28 g is attached to a certain spring, it makes 17 complete vibrations in 3.0 s. What is the spring constant of the spring? Answer in units of N/m

**Chemistry**

For the following reaction, 3.93 grams of carbon tetrachloride are mixed with excess methane (CH4). The reaction yields 4.10 grams of dichloromethane (CH2Cl2). methane (CH4) (g) + carbon tetrachloride (g) dichloromethane (CH2Cl2) (g) What is the theoretical yield of dichlorom...

**Chemistry**

What volume of a 0.332 M hydrobromic acid solution is required to neutralize 29.6 mL of a 0.155 M calcium hydroxide solution ?

**chemistry**

How many grams of solid potassium hydroxide are needed to exactly neutralize 10.8 mL of a 1.25 M hydrobromic acid solution

**Chemistry**

According to the following reaction, how many grams of nitrogen gas will be formed upon the complete reaction of 22.2 grams of hydrogen gas with excess nitrogen monoxide? nitrogen monoxide (g) + hydrogen (g) nitrogen (g) + water (l)

**Average Value - Calculus**

What is the average value of y for the part of the curve y = 4x − x^3 that is in the first quadrant?

**geometry**

what happens when you put 7 over x and 9 and 11????????:)

**Life Science 6thgrade**

Explain how you could determine whether the seeds in a packet of round pea seeds have the genotype Rr or RR, in which R represents round seeds and r represents wrinkled seeds?

**Life Science 6th grade**

Explain how you could determine whether the seeds in a packet of round pea seeds have the genotype Rr or RR, in which R represents round seeds and r represents wrinkled seeds?

**Chemistry**

The volume of a sample of oxygen is 300.0mL when the pressure is 1.00 atm and the temperature is 27.0 degrees C. At what temperature is the volume 1.00 L and the pressure 0.500 atm?

**Integrated Physics and Chemistry**

Which of the following forms of energy transfer can occur in a vacuum? A) conduction B) convection C) radiation D) all of the above Can I get some help on this one too, please?

**Integrated Physics and Chemistry**

Thanks to both of you (:

**Integrated Physics and Chemistry**

Okay. Thank you for the help (:

**Integrated Physics and Chemistry**

So the gold sample will experience a greater increase in temperature?

**Integrated Physics and Chemistry**

A 5.0-gram sample of gold and a 5.0-gram sample of iron both absorb exactly 25 calories of energy. The specific heat of gold is 0.03 cal/gÂ°C. The specific heat of iron is 0.11 cal/gÂ°C. Which of the following statements is true? A) The gold sample will exp...

**Geography/History**

Okay. Thank you. And I know, I just don't think I've been keeping that in mind.

**Geography/History**

I'm doing an alternate test on Sub-Saharan Africa, and Africa. I cant find all the answers in the book, and i can't find a good website. Can someone help me find a good website for Sub-Saharan Africa?

**Geography/History**

Okay. thank you (:

**Geography/History**

Which of the countries listed below receives the most rainfall? A) Somalia B) Namibia C) Democratic Republic of Congo D) Central African Republic I cant find the answer to this anywhere, can someone help?

**Geography/History**

Oh okay. Thank you, Ms. Sue (:

**Geography/History**

uhm. No they don't have to be in order. I didn't know there was an order for them to go in

**Geography/History**

cost and raw water quality?

**Geography/History**

These factors hinder water quality improvement in Eastern Europe. 1) carbon credits 2) cost 3) outdated systems 4) raw water quality 5) unskilled employees Can someone help, please?

**IPC**

The specific heat capacity of aluminum is 0.22 cal/gÂ°C. How much energy needs to flow into 20.0 grams of aluminum to change its temperature by 15Â°C? How do i set this problem up to solve it?

**geometry**

how do you exolain logic with converse, inverse, and contrapositive.

**PHYSICS**

use the formula F=(G(m1)(m2))/r^2 G=universal gravitational constant= 6.67x10^-11 N m^2/kg^2 F=9.8 N (given) m1=1.0 kg (given) m2=mass of earth (variable) r=6.4x10^6 m (given) 9.8 N=((6.67x10^-11 N m^2/kg^2)(1.0 kg)(m2))/(6.4x10^6 m) x=6.02x10^24 kg

**chemistry**

a 30. L sample of gas exerts 200. mm Hg pressure at 10 degrees C. What volume does the gas have at 300. mm Hg and 25 degrees C?

**chemistry**

a 30. L sample of gas exerts 200. mm Hg pressure at 10 degrees C. What volume does the gas have at 300. mm Hg and 25 degrees C?

**IPC**

Element A and element B have bonded and formed compound AB. Which of the following statements is true? A) Compound AB has chemical and physical properties that are completely different from those of A and B. B) Compound AB has chemical and physical properties that are a blend ...

**IPC**

Oh okay. Thank you bunches! (:

**IPC**

What is the change of phase from a solid to a gas? I know, liquid to gas is evaporation. So what if it skips the liquid part? Help?

**english **

I'm pretty sure it would be A. Ha, I'm sitting behind you! :D

**History/Geography**

Wait... what do you mean Iran may have some "designs" on Jordan?

**History/Geography**

Thank you. Very much

**History/Geography**

ahh okay. I understand that. I like the way you put it better than the way my teacher did. Thank you.

**History/Geography**

Essay question: Choose an article reporting on a site where a conflict is likely to occur in the future. Summarize the article and discuss what role, if any, culture will play in the situation. How am I supposed to write about something that MIGHT happen in the future?! I'...

**THE PARTS OF SPEECH**

In the following sentence, identify the part of speech of the italicized word. Thousands of years ago, fish were caught in nets and traps.

**11th grade**

1,750 meters, since you're hearing the echo, and the ehco is twice the distance. So, you'd take 350 * 10 / 2 or just 350 * 5.

**Algerba 2**

Find H(-2)if H(x)=xto the third + 1

**geometry**

The area of the larger of two similar polygons is 729 square centimeters. If the scale factor of their perimeters is 2:3 what is the area of the smaller polygon?

**math**

4x^2+4x=3 solve by completing the square

**math**

2x^2+x-28=0 Solve by completing the square

**English**

can you give 5 points of society's role in music? painting?

**math**

17000 times a day, 1062.5 times an hour, 17.7 times a minute

**Social Studies**

Through which four South American countries does the 20 degrees South line of latitude pass

**ecology**

What four things vary the size of biological populations?

**ecology**

What four things vary the size of biological populations?

**social studies**

the name for topographical landforms that include mountains,hills, plateaus,etc is called?

**social studies**

the applacian mountains run from what to maine

**social studies**

the usa is made up of how many geographical regions?

**social studies**

people visit america to see its what?

**social studies**

thank you so much

**social studies**

what is the area stretching from new mexico to washington?

**American republic**

What was the main difference between hessian soldiers and patriots?

**Algebra 2**

What is -5 square roots of 1?? thank you!! :) -1 sqrt (1) is 1. -5*1 = -5

**Earth Science**

A region of ocean water having the same temperature and salinity throughout is what??

**Science**

Chemistry: What is the general formula for a chemical reaction? reactants >> products

**help**

The CN Tower is 553m high. A person in a boat on Lake Ontario, at a point B due south of the tower, observes the top (T) of the tower at an angle of elevation of 8 degrees. At the same time, another person, at a point C on a bearing {S 85 degrees E } from the towerobserves an ...

**MATH!!!!**

The CN Tower is 553m high. A person in a boat on Lake Ontario, at a point B due south of the tower, observes the top (T) of the tower at an angle of elevation of 8 degrees. At the same time, another person, at a point C on a bearing {S 85 degrees E } from the towerobserves an ...

**Discrete..HELP!!!**

how do you solve this..I have idea even where to begin. If |x| = 11 and |y| = 23 and | x - y| = 30, find |x + y| We're asked: If |x| = 11 and |y| = 23 and | x - y| = 30, find |x + y| From this, |x| = 11, we know x=11 or -11 From this, |y| = 23 we know y=23 or -23 However, ...

**math**

i dont get problems like y=-2x. and y=3x-1 what is 15.02499 rounded to the nearest tenth what is 15.02499 rounded to the nearest tenth Oh geez, it's been a whole summer since I tried this. But if I'm not mistaken isn't it 15.0 ? Please correct me anyone if I am wro...

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