Doug

This page lists questions and answers that were posted by visitors named Doug.

Questions

The following questions were asked by visitors named Doug.

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 followi...

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 whe...

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 Fo...

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.

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

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

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

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

name two things colonial leaders offered to attract settlers

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?

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...

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% invest...

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?

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...

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

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

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

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

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

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)....

A certain freely falling object, released from rest, requires 1.40 s to travel the last 20.5 m before it hits the ground. (a) Find the velocity of the object when it is 20.5 m above the ground. (Indicate the direction with the sign of your answer. Let the...

A small mailbag is released from a helicopter that is descending steadily at 2.58 m/s. (a) After 3.00 s, what is the speed of the mailbag? v = 32.01 Correct: Your answer is correct. m/s (b) How far is it below the helicopter? d = 41.9 ?????????????/ Incor...

A boy exerts a horizontal force of 111 N on a box with a mass of 32.7 kg. HINT - (a) Make a free-body diagram and apply the x-component of Newton's second law. (b) Apply the relationship between static friction and the normal force. (a) If the box doesn't...

A horse is harnessed to a sled having a mass of 231 kg, including supplies. The horse must exert a force exceeding 1250 N at an angle of 36.3° (above the horizontal) in order to get the sled moving. Treat the sled as a point particle. HINT - Use the relat...

A block of mass 57.1 kg rests on a slope having an angle of elevation of 28.3°. If pushing downhill on the block with a force just exceeding 162 N and parallel to the slope is sufficient to cause the block to start moving, find the coefficient of static f...

Consider the figure below. www.webassign.net/sercp9/4-p-017-alt.gif (a) Find the tension in each cable supporting the 688-N cat burglar. (Assume the angle θ of the inclined cable is 38.0°.) inclined cable - ??? horizontal cable - ??? vertical cable - ???

Unit fractions- 3 copies of 1/6 are? 9 copies of 1/12 are?

Provide Amortization table on a thirty year loan of $115000 at 2.75% over 360 monthly payments

Answers

The following answers were posted by visitors named Doug.

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 bou...

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.

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).

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

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...

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

Divide 40 by 2.

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% solute...

Best guess - molecular model

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)

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

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

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

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

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

Thank you! I see where I went wrong

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

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

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

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 answer...

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 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.

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.

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

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

yep. It's 13/225.

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

Hey, I did the calculations and got a - 1258.7 N b - 1.700 N c - 3350.739 N But, the website says the answer is wrong.

The scenario could be prevented by two main ways: 1) Krystal should be more responsible in the lab 2) Carin should wear lab appropriate attire, including closed shoes To deal with this scenario: 1) Cain should wash her feet in the closest washing station...

www.opentextbc.ca/physicstestbook2/chapter/elasticity-stress-and-strain/

www.nde-ed.org/EducationResources/CommunityCollege/Materials/Mechanical/Tensile.htm

Plastic behavior: This permanent deformation behavior occurs when the tensile (or compressive) uniaxial stress reaches sy. Hard materials like diamond, nitrided steel and even most plastic are resistant to permanent deformation.

Is it this question? 66) Erika spent 5/6 hr on her computer visiting the history channel and the discovery channel websites. She spent 1/3 hr at the history channel website. How many hours did she spend at the discovery channel website? A) 2/9 hr B) 7/9 h...

Yeah I'm "confused", Could someone "help" me

@TOtaly ReAl ::::::)))))) is wrong

Thx, guys Benedict Cumberbatch is right.