# Posts by alex

Total # Posts: 3,757

**physical science**

10. A balloon has a volume of 0.5 L at 20°C. What will the volume be if the balloon is heated to 150°C? Assume constant pressure and mass.

**physical science**

3. Atmospheric pressure at the top of Mt. Everest is about 150 mm Hg. That is why climbers always bring oxygen tanks. If a climber carries a 12.0 liter tank with a pressure of 35,000 mm Hg, what volume will the gas occupy if it is released at the top of Mt. Everest?

**physical science**

3. Atmospheric pressure at the top of Mt. Everest is about 150 mm Hg. That is why climbers always bring oxygen tanks. If a climber carries a 12.0 liter tank with a pressure of 35,000 mm Hg, what volume will the gas occupy if it is released at the top of Mt. Everest?

**physical science**

Boyle’s law states that if you squeeze a fixed amount of a gas into a smaller volume, the pressure will increase. Explain why? this is the answer

**physical science**

I was not wrong

**physical science**

1. Boyle’s law states that if you squeeze a fixed amount of a gas into a smaller volume, the pressure will increase. Explain why in your own words.

**chemistry**

What volume (mL) of a 3.23 %w/v saline solution contains 69.1 mg of NaCl?

**science**

3. Atmospheric pressure at the top of Mt. Everest is about 150 mm Hg. That is why climbers always bring oxygen tanks. If a climber carries a 12.0 liter tank with a pressure of 35,000 mm Hg, what volume will the gas occupy if it is released at the top of Mt. Everest?

**science**

1. Boyle’s law states that if you squeeze a fixed amount of a gas into a smaller volume, the pressure will increase. Explain why in your own words.

**Alg. I**

A cylinder has a radius of 3 cm and length of 10 cm. Every dimension of the cylinder is multiplied by 3 to form a new cylinder how is the ratio of the volumes related to the ratio of corresponding dimensions

**Math**

3000, the farmer can just carry the bananas over.....

**Geometry**

60

**CHEMISTRY**

Hydrogen cyanide is used in the production of cyanimid fertilisers. It is produced by the following reaction: 2CH4 + 2NH3 + 3O2 2HCN + 6H2O (a) How much hydrogen cyanide can be produced starting with 100 kg of each of the reactants? (b) Which is the limiting reagent?

**biology**

what characteristics appear to show consistent development over the 4 million years of hominid evolution?

**English**

Help! I need help unscrambling these letters into two words it is due tommorow! The letters are tttrrlnemisianaaon it is the name of a mall, remember its a two letter word

**Math**

At a certain time of day, a tree that is Xft tall cast a shadow that is X-35 meters long if the distance from the top of the tree to the end of the shadow is X+5 meters, what is the height, X, of the tree?

**Math**

24x^3y^2/42x^7y^-6 please help i need to simplify i can only use positive intergers

**Math**

24x^3y^2/42x^7y^-6 please help i need to simplify i can only use positive intergers

**Math**

24x^3y^2/42x^7y^-6 please help i need to simplify i can only use positive intergers

**biology**

In a chorus of male frogs of one species, which would be considered by evolutionary biologists to be the fittest? The biggest frog. The frog that has the most descendants. The frog with the largest territory. The loudest frog. The frog that attracts the most females. I am ...

**biology urgent**

In mice, a gene controlling coat colour has 2 alleles; B (black) and b (white). A pure breeding black mouse is crossed to a white mouse and all the offspring are black. The offspring are then crossed to white mice. The phenotypes of the offspring of this second cross are ...

**Math help**

thank you

**Math help**

Calculate the length of the diagonal for the given rectangular prism. Round to the nearest tenth length 10 cm width 4 cm height 10 dont tell me the answer just show me how to do it

**Math Alex**

the options are 14.7 10.8 12.2 15.6

**Math Alex**

Calculate the length of the diagonal for the given rectangular prism. Round to the nearest tenth length 10 com width 4 height 10

**Chemistry**

Ammonia is composed of hydrogen and nitrogen in a ratio of 9.33 g of nitrogen to 2.00 g of hydrogen. If 2.19 g of nitrogen combined completely with hydrogen to form ammonia, what mass (g) of ammonia would be formed?

**Algebra**

I am pretty sure this goes like this 4y+3=3y+x (i) 2x+4y=18 (ii) Rearrange (i) so that x=4y+3-3y Take (ii) and sub x it will become 2(4y+3-3y)+4y= 18 2(y+3)+4y =18 2y+6+4y=18 6y+6=18 6y=18-6 6y=12 y=12/6 y=2 (iii) Now use what you found for y in (iii) and sub in the (ii or i ...

**Math question?**

how to get diagonal saying lenght hight width

**Math question?**

Calculate the length of the diagonal for the given rectangular prism. It says length hight width but in the lesson it says length hight deph how to i find the diagonal example

**Math ASAP**

Bonnie has a rectangular photographic print that is 5 inches wide and 7 inches long. If she multiplies both the length and width by 1.5, how will the perimeter of the print increase?

**English help ASAP**

thanks

**English help ASAP**

Which of the sentences below is punctuated correctly? (1 point )I opened the door and my cat ran outside. I opened the door, and my cat ran outside. I opened the door, my cat ran outside. i think its 2

**music**

Started by the creoles and went away from the norm of the classical and romantic style in western Europe. Also, it had slave rhythms which were unique to each plantation.

**Math**

Kelsea has 6 coins. One-third of her coins are dimes. The value of the dimes is one-fourth the value of the coins. How much money does Kelsea have?

**Math Please answer**

how to find slope of a graph without points please make it as simple as possible

**math!!!!!!**

the options are 6 3 9 and 12 i think its 9

**math!!!!!!**

How many lateral edges are there in a triangular prism

**Math problem**

The area of a triangle is equal to 1/2 the hight times the base. A triangle has a height of 10 and a base of 20. If the height of the triangle is increased by 10% and the base is decreased by 10%, then the area of the new triangle formed___________. ? a)stayed the same b) ...

**Physics**

A quantity of monatomic ideal gas expands adiabatically from a volume of 2.0 liters to 6.0 liters. If the initial pressure is P0, what is the final pressure?

**physics**

As your bus rounds a flat curve at constant speed, a package with mass 0.900 , suspended from the luggage compartment of the bus by a string 46.0 long, is found to hang at rest relative to the bus, with the string making an angle of 27.0with the vertical. In this position, the...

**physics**

A toboggan approaches a snowy hill moving at 15.0 m/s. The coefficients of static and kinetic friction between the snow and the toboggan are 0.460 and 0.350, respectively, and the hill slopes upward at 41.0 above the horizontal. Find the acceleration of the toboggan as it is ...

**Social studies ASAP**

Which of the following helped to increase the populations of northeastern cities more diversity successful cotton crops growth of factories and trade building of the Erie Canal i chose building of the erie canal

**science**

1. When you hold a piece of chocolate in your hand, why does the chocolate melt? 2. Which is a larger unit of heat: calorie, kilocalorie, Btu, or joule?

**math probability**

If I had the many black grey and white socks and i pulled out 2 socks that did not match. How many more socks do i have to take out of my drawer to be certain to have a matching pair

**maths**

Using properties of the triple scalar product and triple vector product, prove that (a ^ b) (c ^ d) = (a *c)(b * d) - (a * d)(b * c): [Hint: start by thinking of (a ^ b) (c ^ d) as (a ^ b) e, where e = c ^ d]

**math**

Find the percent of decrease. Original rent: $600 New rent: $450

**history**

who was the united states able to win the war in the pacific?

**history**

who was commander of the u.s. troops on bataan?

**5th grade math**

Dick

**Physics**

The radio station WBRU broadcasts in the radio spectrum at 95.5 MHz. What is the wavelength of this electromagnetic wave in meters?

**Math**

Please help with the following questions: 1. write 12 million in scientific notation 2. Write 17,600 in scientific notation 3. write 1.2 * 10 to the fourth power in standard form 4. write 5 * 10 to the sixth power in standard form

**history**

thanks

**history**

what was necessary for the united states to be able to increase its production of war materials in a short period of time?

**Geography**

What is the name of the salt lake located on the border between Israel and Jordan? I think the answer is the Dead Sea, is that right?

**science**

Would you expect a substance to be a solid, liquid, or gas at absolute zero? Explain your answer.

**math ALGEBRA 1 PLEASE HELP!**

You have $2.75 in dimes and quarters, and you have a total of 17 dimes and quarters. How many of each type of coin do you have?

**MATH**

56

**Algebra**

how to flowchart and backtrack 10 = 0.25x - 0.25

**5th Grade Math**

Glenda bought z containers of laundry detergent at $9 each. She gave the cashier $50. a. Find the change Glenda received in terms of z. b. If z = 3, how much change did Glenda receive?

**5th grade Language Arts**

I missed these questions on homework about adjectives. Can you double check my corrections? Directions: 1. tell what is the adjective 2. what noun or pronoun it's describing Sentences: 1. Rhode Island is a small state. My orig ans: 1. small, 2. Rhode Island Correction: 1. ...

**geography**

when did the seat of Japanese Emperors moved from Kyoto to Edo

**math ALGEBRA 1 PLEASE HELP!**

You and two friends scored all 7 runs for your team in a baseball game. Jeff scored twice as many runs as you, and Mary scored twice as many runs as Jeff. How many runs did Jeff score?

**Math**

A rectangular field will be fenced on all four sides. Fencing for the north and south sides costs $5 per foot and fencing for the other two sides costs $9 per foot. What is the maximum area that can be enclosed for $6000?

**Geography**

Which state capital is east of the 90 degree W longitude line: Jackson, Indianapolis, or St Paul. I think that Indianapolis is the answer is that correct? Also, Is this correct? The Pacific Ocean is East of Asia, East of Australia, West of North America and West of South ...

**math**

Alex has 1/2 pizza left in the fridge. At breakfast he ate 1/3 of it. What fraction of the original pizza does he have left?

**Chemistry**

Write the half-reactions for F3+ + I- ---> F2+ + I2 and balance it.

**Trigonometry**

a. Write a formula for Q as a function of t. b. What is the value of Q when t=10 1. Initial amount 2000; increasing by 5% per year 2. Initial amount 112.8; decreasing by 23.4% per year 3. Initial amount 5; increasing by 100% per year

**5th grade Language Arts**

I have a couple of phrases/sentences that need to be labeled as a type of figurative language. 1. Pitter Patter, raindrops are falling from the sky. (could this be onomatopoeia or personification?) 2. Boil the butter and bring it by the bank. (could this be an idiom or ...

**Physics**

a stone thrown from ground level returns to the same level of projection 4s after. with what speed was the stone thrown? Take g=10 m/s2

**math**

the sum of the reciprocals of 3 consecutive positive integers is 47 divided by the product of the integers. what is the smallest of the 3 integers

**math**

the sum of the reciprocals of 3 consecutive positive integers is egual to 47 divided by the product of the integers. what is the smallest of the 3 integers

**Math**

Phoenix is 100% correct!

**Physics**

Black Holes are suspected when a visible star is being noticeably pulled by an invisible partner that is more than 3 times as massive as the Sun. A red giant star is accelerated in a linear direction by gravity at 0.075 m/s2 towards an object that is 9.4 x1010 m away. a) What ...

**Physics**

The International Space Station is 370 km above the Earth's surface (Re = 6378 km, Me = 5.98 x 10^24 kg). What is the linear velocity of the space station in m/s

**chemistry**

The solubility of strontium oxide, SrO, in water is 22.8 g per 100 mL at 100 °C and 0.69 g per 100 mL at 30 °C. Is the dissolving of strontium oxide in water an endothermic or exothermic process?

**math PLEASE HELP IM STUCK!!!**

Admissions to a concert cost $45. A vendor sells t-shirts for $12 each. What is the maximum number of t-shirts you can buy?

**math**

admissions to a concerto cost $45. A vendor sells t-shirts for $12. You have $90. What is the maximum number of t-shirts you can buy?

**science**

how much potential energy did the object have before it fell?

**science**

a cart was pulled for a distance of 1 kilometer and the amount of work accomplished equal 40.000 joules. with what force was the work accomplished?

**science**

a cart was pulled for a distance of 1 kilometer and the amount of work accomplished equal 40.000 joules. with what force was the work accomplished?

**physical science**

push a box across a table with a force of 5 newtons and the box moves 0.5 meter. how much work has been accomplished?

**math**

I was confused somewhat more difficult

**math**

solve each system by elimination x+y=10 x-y=2

**math**

1. y=xt1 2x+y=7 2. x=y-2 3x-y=6 3. y=2xt3 5x-y=-3

**algebra**

solve each system by substitution 1. 6x-3y=-33 2xty=-1 2. 2x-y=7 3x-2y=10 3. 4x=8y 2x+5y=27

**physical science**

Mike jogs east at a rate of 4 mph. The wind is blowing west at 1 mph. What is Mike's velocity?

**algebra**

supose you bought eight oranges and one grapefruit for a total of $4.60. later day, you bought six oranges and three grapefruits for a total of $4.80. what is the price of each type of fruit?

**algebra 2**

please help me

**Algebra 2**

Write a polynomial function in standard form with the given zeros: x=2,-2,4

**Physis**

a 2kg mass is hung from a tree and is released. Using the nodes on the graph, sketch the general shape of the vertical position of the mass versus time

**grammar**

1is correct

**Physics**

A coin is placed on an old record turntable which rotates at 78 rpm. The coefficient of friction between the record and the coin is 0.17. a) What is the angular speed of record in radians/s? b) At what distance (m) from the center will the coin begin to slide off the record? c...

**Physics**

Thanks

**Physics**

A toy plane of mass 0.624 kg is flown in a circle when attached to a string. The plane moves around the circle with a rotational speed of 8.09 rpm. The length of the string is 2.60 m. What is the tangential velocity, v, of the plane? .

**Physics**

A student puts on a Dresden Dolls disc in her cd player which spins at 1800 revolutions per minute. A compact disc has a mass of about 0.016 kg and a radius of 6.0 cm. a) What is the period of rotation in seconds? b) What is the frequency of the rotating disc? c) What is the ...

**Physics**

I was not taught how to do this

**Physics**

c) A penny sits 12 cm from the center of a record turning at 33 1/3 rpm. What is the tangential speed in m/s? d) A mass spins with a tangential speed of 1.2 m/s on the end of a string which is 0.75m long. What is the period of the rotation in seconds?

**Physics**

On August 12, 2005 the Mars Reconnaissance Orbiter (MRO) was launched from Earth and reached Mars on March 10, 2006. The orbiter is in roughly circular orbit about 390 km above the martian surface. Mars has a radius of 3396 km and a mass of 0.642 x 1024 kg (6.42E23 kg). b) ...

**5th grade math (word problems)**

pennies! Thanks Ms. Sue

**5th grade math (word problems)**

I'm not sure how to solve the following problem: If you divide 1/10 of a dollar into parts that are each 1/100 of a dollar, how many parts are there? What are they called? To solve, would part of the answer be that i would have 10 parts of 1/100 (because I divide 100 by 10...