# Posts by Doug

Total # Posts: 89

**Chemistry**

1. When the hydrochloric acid is added to the calcium carbonate, will there be an excess of HCl(aq) or CaCO3(aq) or will there be stoichiometric equivalents of the two? Show your calculations. 2. In this lab, you will use a 50mL buret and ~0.3M NaOH (aq). Calculate the mass of...

**math**

When the product of 6 and the square of a number is increased by 5 times the number, the result is 4. Which equation represents this situation? 6x2 + 5x - 4 = 0 6x2 + 5x + 4 = 0 62x + 5 + x = 4 6 + x2 + 5x = 4

**math**

What is the smallest distance between the origin and a point on the graph of $y=(x^2-3)/(sqrt{2})

**Computer Programming**

How to recursively count how many positive numbers are in an array in java without ArrayList?

**Algebra 1**

(1,3) AND (1,9)

**math**

Molly wants to purchase ribbon to make bows. Red ribbon costs $1.59 per yard and gold ribbon costs $2.70 per yard. How many yards of each type of ribbon can Molly purchase if she can spend at most $20 altogether?

**Legal**

How fast was a car driving when it applied its brakes after striking someone who remained on the hood, and did notcome to a stop for 153 feet, while descending a hill?

**algebra**

Two trains are on the same track heading for each other they're two miles apart wondering is going 30 miles per hour the other train is going 10 miles for how many minutes will it take before they meet each other?

**Maths**

One over three now right guys. That's the answer.

**mathematies**

33.33333 km in 3/2 hours

**science- physics**

check your signs. The line is to the LEFT of the y axis.

**Science- RE-DO**

5 is really a repeat of 3, and the answer there is c.

**Science- RE-DO**

in 4, if dimples is dominant and the parent is homozygous, the parent has two dimple genes, so every offspring MUST get a dominant dimple gene from that parent.

**Science- RE-DO**

for problem 3, crossing a Ss with a ss will give Ss - short hair Ss - short hair ss - long hair and ss - long hair. Half have long hair and half have short, so the answer is B.

**Science- RE-DO**

I wouldn't trust Anonymous's answers. Homozygous means that animal has two of the same allele. To guarantee an offspring will have a recessive trait (in problem 2) both parents must be homozygous in the recessive allele (if not, the child could get the dominant gene). ...

**Math**

to tell if a number is divisible by 3, add up the digits. IF the sum is divisible by 3, so is the original number. here 3+7+1=11, so 1, 4, and 7 as the last number would give you 12, 15, and 18 as the sum of the digits, so 1, 4, and 7 are the three answers.

**Algebra**

Solve and graph on a number line: -3/2x + 4/ > 6

**Algebra**

Solve and graph on a number line: -3 times the absolute value of 2x + 4 is greater than 6

**Algebra**

A plane takes off from an airport and flies east at a speed of 350 mph. Ten minutes later, a second plane takes off from the same airport and flies east at a higher altitude at a speed of 400 mph. How long does it take the the second plane to overtake the first plane?

**physics**

Thank you Henry for helping me with my physics problem about the angle etc and the golf ball on 7/28.

**physics**

a golf ball is observed to hit the ground 800 ft. away after a flight of 5 seconds. Assume that the ground is level and neglect friction of the air. Find the angle of elevation above the ground of the initial motion of the ball, find the initial velocity of the ball, find its ...

**Math**

The formula Total cost = Cost + Shipping cost + Holding cost is used to find the total cost of a business asset. The formula can be written in symbols as T=C+S+H. Solve the formula for C, the cost of the asset.

**public speaking**

Communicating effectively helps us to succeed in areas of?

**Precal**

If 80 percent of radioactive element is left after 250 years, then what percent remains after 600 years? What is the half life of the element?

**physics**

A baseball is thrown vertically upward with a speed of 17.8 m/s from a height of 1.11 m. How high does the ball rise from its original position?

**Algebra**

An inheritance of $19,000 was divided among three investments yielding a total of $1490 in simple interest per year. The interest rates for the three investments were 5%, 7%, and 10%. The 5% and 7% investments were $4000 and $1000 less than the 10% investment, respectively. ...

**english**

In the third century, bands of savage barbarians repeatedly broke through the frontier defenses of the Roman province of Gaul,_________the countryside with fire and sword, and either slew or carried off the____ a. scanned..partisans b. pacified..vagabonds c. devastated.....

**chem**

Using data from the following reactions and applying Hess's law, calculate the heat change for the slow reaction of zinc with water (answer must be in kJ/mol Zn): Zn(s) + 2 H2O(l) ----> Zn^2+(aq) + 2 OH-(aq) + H2(g) (ΔHrxn = ?) H+(aq) + OH-(aq) ----> H2O(l) (&#...

**math**

yep. It's 13/225.

**Math ( Palette of Problem)s)**

40 people at a beach or water skiing 9 of the 12 people decide to swim.how many people are not on the beach?

**physics**

A sphere has a radius of 0.20 meters and has a uniform surface charge density equal to 6.3 micro coulombs per meter squared. A second point charge has a magnitude of 0.58 micro coulombs and is 0.61 meters away from the center of the sphere. Find the magnitude of the force ...

**math**

3%

**chemistry**

when burned, methane gives off heat at a rate of 342 J/g. How many kilojoules of heat will be given off when 4.50 kg burns?

**Statistics**

5 and 22

**science**

spent steam from an electric generating plant leaves the turbines at 120.0 C and is cooled to 90. 0 C liquid water by water from a cooling tower in a heat exchanger. How much heat is removed by the cooling tower water for each kg of spent steam?

**social studies**

Thank you!

**social studies**

name two things colonial leaders offered to attract settlers

**math**

-4=(7x-(-1))/-8

**Chemistry Molarity**

1.5 M

**math**

from agroup of 18 kids how many ways can you choose a group of 4 to do a project

**microbiology**

In a solution, the substance present in the largest amount is referred to as the solvent. Consider adding one ounce of oil to one gallon of water. Using terms, such as solute, solvent, polar, non-pola

**Math**

28.35

**Statistic**

I am getting problems with my calculations. For the first part of the question I got 68 when I try another calculation I got 1. One of the method used was Degree of freedom =(r-1)(c-1). TABLE 12-7 The director of transportation of a large company is interested in the usage of ...

**Chemistry**

N_2+3H_2-->2NH_3 How many grams of H_2 are needed to react with 3.20 grams of N_2

**chemistry**

If you have 1.90 moles of H_2 How many grams of NH_3 can be produced?

**English**

I will try this again. I have to identify the verb and tell if it's transitive or intransitive. It is related to wheat, oats, and barley. is related=intransitive In Japan the hollow stems serve as water pipes. serve=intransitive

**English**

I'm having trouble with transitive and intransitive verbs. I have to pick out the verb and tell if it's transitive or intransitive. Some reach a height of 120 feet. reach=intransitive The stems measure a foot in diameter. measure=intransitive

**English**

Support local farming Reasonable distance so it doesn't travel as far Those are my 2 ideas so far

**English**

Slow Food vs. Fast Food Why is it better to buy local products for slow food? This is one of my bullets for an English essay.. I just need some guidance on how to set this up and main points.

**physics**

The engineer of a Russian nuclear submarine lurking under the Arctic Sea reports an outside pressure of 35 ATM. How deep is the submarine? Neglect ice thickness.

**OChem**

A mixture of acetone and ethyl acetate of unknown ratio begins to boil at 65 degrees celcius (760 torr). What is the composition of this binary mixture in terms of the mole fraction of acetone and that of ethyl acetate?

**criminal justice**

where would i find real world examples that i could cite in apa format

**Physics**

Thank you! I see where I went wrong

**Physics**

Sorry here's the picture: img245.imageshack.us/img245/3526/2505100050.jpg

**Physics**

What is the acceleration of the upper block? The coefficient of kinetic friction between the lower block and upper block is 0.0005. The coefficient of kinetic friction between lower block and floor is 0.0001. Upper block is 1kg, lower block is 2kg, and Force of 20N is applied ...

**english**

Select the sentence that is punctuated correctly. Zora’s lemon tree produces too much fruit. She gives them away therefore, to her friends and neighbors. Zora’s lemon tree produces too much fruit. She gives them away, therefore, to her friends and neighbors. Zora&#...

**Chemistry**

What is the net ionic equation for the ionization of HClO3 in water?

**microbiology**

list the 5 main processes of diagnosis of a bacterial infection.

**English Comma splices and run on sentences**

1. The following sentence is an example of proper comma usage: “Many students anticipate spring break but, Luis looks forward to winter vacation more true or false

**Math**

The number of daylight hours in a day is harmonic. Suppose that in a particular location, the shortest day of the year has 7 hours of daylight and the longest day of the year has 18 hours. Then, we can model its motion with the function N=Asin(Bt) + C where t is expressed in ...

**Trigonometry**

The number of daylight hours in a day is harmonic. Suppose that in a particular location, the shortest day of the year has 7 hours of daylight and the longest day of the year has 18 hours. Then, we can model its motion with the function N=Asin(Bt) + C where t is expressed in ...

**bio**

5. What is meant by the term “carbon fixation”? a. The release of CO2 from glucose during catabolism b. The delivery of CO2 to an enzyme required for the production of glucose c. The production of two 3-carbon molecules from one 6-carbon molecule d. The production of...

**bio**

4. In the Krebs cycle (or citric acid cycle), starting with citrate, what happens? a. Organic compounds become more reduced and CO2 is produced b. Organic compounds become more oxidized and CO2 is produced c. Some organic compounds become reduced and electron carriers become ...

**social studies**

Mayflower compact was written by the pilgrims which also sailed across the Atlantic on the Mayflower

**Algebra**

The order is not important. The answer is x=-2 or x=1 Verify by substituting for x 2(-2)^2+2(-2)-4=0 8-4-4=0 0=0 2(1)^2+2(1)-4=0 2+2-4=0 0=0

**Math**

You left out information in your equation. The equation I find for this is D=sqrt(13h). The equation in your book may be differnt. Solve for h D^2=13h h=(D^2)/13

**Math**

determine vertex, focus and directrix of parabola. then graph the parabola. second equation: y^2 -4y -12x= 8 Please help me this is do 2day bc i forget to turn it in to my teacher

**Math**

determine vertex, focus and directrix of parabola. then graph the parabola. second equation: y^2 -4y -12x= 8

**Math**

determine vertex, focus and directrix of parabola. then graph the parabola. first equation: y^2 -2x-8=0 second equation: y^2 -4y -12x= 8 please show your work!

**math**

determine vertex, focus and directrix of parabola. then graph the parabola. first equation: y^2 -2x-8=0 second equation: y^2 -4y -12x= 8

**accounting**

72,000.

**accounting**

30,000*50*.05=75,000

**Algebra**

slope intercept is y=mx+b. Find the slope (m) using the points. (delta y / delta x). Then substitute a point to find b.

**Math, derivatives**

You're on the right track. sin 2x= 2sin x cos x (identity) substitute into your first answer. f'(x)=2x-2(sin2x) f'(x)=2(x-sin2x)

**physics**

Best guess - molecular model

**Grade 12 Biology**

It should be in your book under kidney functions. Evaluation of Kidney Function A urinalysis is an analysis of the volume and physical, chemical, and microscopic properties of a urine sample. Chemically, normal urine contains about 95% water and 5% solutes. The solutes ...

**Physics**

M1*V1=M2*V2 Whichever has the most momentum will win. Just multiply MassxVelocity and compare.

**Math**

Divide 40 by 2.

**Physics**

Force of gravity= gravitational constant x Mass1 x Mass2 /r^2 so if Mass1 increases by 4 and the other by 2 then it would increase by 8. Between 2 objects, Inverse Square Law: Gravity at A = gravity at B × (distance B / distance A)2 It would be (1/4)^2 or 1/16

**scienc**

range of tolerance because the organism has to react to it's environment. It can't control it.

**math**

Length is 6 less than 3xwidth so L=3W-6 Perimeter = L+L+W_W or 2L+2W Perimeter is 100m so 2L+2W=100 You have 2 equations and 2 unknowns so you can solve it.

**business calculus**

Draw a picture of the problem. You should get to the forumlae 700=24L+84W with basic math. Solve for L (or W). A=LxW. Maximum Area occurs when derivative = 0. Take derivative and solve for L (or W).

**ss**

what mountain range runs along the western coast of south america?

**biology-mitosis**

Size

**Math**

In algebra terms, you could look at the problem like this: A. Set your variables. Do this by thinking about which parts of the problem can change. For this problem, there is the height of the final bounce, the height of the building, and the number of bounces. 1) h = Height of...

**pre-calc**

c zero

**science**

The Earths Interior: "Ability of a solid to flow or change shape like a thick liquid." It is one word. The third letter is an (A)and it is 10 letters long. plasticity

**Chemistry**

Calculate the work done when 70.0g of tin dissolves in excess acid at 3.00 atm and -15.0 C. Sn(s)+2H^+(aq) -> Sn^2+(aq)+H2(g) Assume ideal gas behavior. Any ideas? I've come up with a few different answers and can't come to a conclusion. I see the following energies...