Wednesday

July 30, 2014

July 30, 2014

Total # Posts: 131

**electronics**

approximate I from a graph of current/time for a discharging capacitor. no idea on this, obviously you cant see the graph, but you dont need to, id just like to know how to approximate this from a graph.

**mathematics**

4 quarters of something implies 4/4 which is 1. therefore X=1

**electronics**

Using wheatstone bridge where R1=top left R2=top right R3=bottom left RT(thermistor 2.11spec)=bottom right. R1=2.2kohm R3=8.2Kohm. must have 0 output at 0degC calculate the required value of R2. Thermistor specs: resistance @ 20degC=2K 25degC=1.68K 200degC=37ohm min operating ...

**maths**

0,5,10,15,20,25,30,35,40,45,50,55,60,65,70,75,80,85,90,95,100

**math**

because 9/64=3/16 (9/64)/3=3/16 three spins, four possible answers per spin. 3*4=16.

**science**

An equal amount of rotational force is applied to both the drill head and the astronaut. Having a greater mass, the force has less noticeable effect on the astronaut, but he will rotate around the drill in the opposite direction. This is defined by newtons 3rd law "for ev...

**maths**

i think its 18+j-24 and 9-j8 respectively, can anyone confirm/deny?

**maths**

compplex numbers multiplying complex and not: 3*(6-j8) also, 3+(6-J8)

**English**

1. ✓ 2.'If it snows tomorrow, I will make a snowman IN the back yard. 3. 'If it snow tomorrow, I will meet my GIRLFRIEND.' (one word) 4. 'If it snows tomorrow, I will HAVE snow fights with my friends.' 5.'If it snows tomorrow, I will meet my frie...

**English**

'busy' 'very active' on the go means to be active.

**math**

the amount that you are saving for is missing.

**math**

1:A(correct) 2:A (correct) 3:B (incorrect) complement is all the outcomes that are not the given outcome 4:B (correct) 5:technically isn't that 0? the odds of a spinner landing on red on a board comprising of only blue green and yellow is 0 (its impossible) assuming that t...

**math please help**

ok, so the first bit is asking how you would make the car better for your preference. for the sake of this i'll make some up. lets say; A) a spoiler ($600) a new paintscheme ($1200) High compression cylinder heads ($1000) B) total=600+1200+1000=2800 i don tknow how to incl...

**math**

an integer is a whole number e.g. 1, 2, 3, 9837, -29237. the best integer would be -18 as the fish is below the surface therefore "-" elevation.

**math**

depends on b if b>20 then true. if b<20 then false

**English Help Please!!! Check!!**

Recently, there haVE been issues regarding pets urinating and defecating in staircases, sidewalks, the courtyard, and the parking lot. If this continues, the costs for daily cleaning these areas may lead rent increases due to consuming additional janitor hours. Please be consi...

**Physics waves- check answers please**

so 1 second would be 340m, 1/4 second is 1/4*340 or 85meters correct!!!!:) 355m/s-306m/s =49m/s correct !

**math**

5*500=h 5*500=2500 2500/5=500 H=2500

**math**

4+16=20 20-16=4 B=20

**math**

12in/ft thats 9 tiles/sq foot (3x3grid) 11*14=154sqft 154*9=1386 1386 tiles

**math**

0.142857'is 1/7 6digits in sequence 40/6=6 2/3 so in effect, the fourth digit:8

**math**

replace 12 with 17.5

**math**

got me numbers mixed up, sorry

**math**

x=shadow length 12/x=5/12 5/12=0.417 12/x=0.417 12/0.416=28.8ft check:12/28.8=0.417 28.8ft

**Science**

to do this you need to use indices: 1x2=2, 2x2=4 2x2x2=8.. . . 2^10(2x2x2x2x2x2x2x2x2x2) gives you 1024 cells so 10 divisions

**math**

ok, to estimate, round 1150 up to 1200. then it is easily divisible by 3 to 400. then account for the initial rouding and reduce answer 'a bit' to about 390.

**Physics waves- check answers please**

1. B, i agree with you 2. smaller than i think (b). the question is badly phrased.you hear a higher frequency (higher pitch) but an increased pitch is a shorter (smaller) wavelength. so technically the frequency is SHORTER, smaller would imply less amplitude (quieter)but i thi...

**physics**

speed of exiting water is :V = sqrt(2*g*H) where g is gravity at 9.81 and H is height of water: sqrt(2*9.81*7.9)=12.44m/s

**history**

Its definately A

**URGENT Physics help**

1: charged polarization 2: lightning bolts contain about 5c i'm assuming that for each answer you meant (using first one) 1.6x10^19 (small 19) in which case, C (5x10^0) 3: attract by polarization 4:f=q1*q2/4piε0*d^2=-3.0 (attractive, so opposite) 5:do as above

**math**

54000/25=2160people/square mile

**math**

2^3x3x5^2=600

**math**

A=w*h so, ends first:9*15=135cm^2 sides:12*15=180cm^2 bottom:9*12=108cm^2 135+180+108=423cm^2

**mathematics**

find the mean and RMS of v=25sin50πt over the range t=0 to t=20ms using integration. i have integrated to: v=-cos(50πt)/2π+c but i dont know how to get the mean and rms.

**chemistry**

What is the final volume of NaOH solution prepared from 250.0mL of 0.800M NaOH if you wanted the final concentration to be 0.200M

**quantum physics**

help please!!!

**Quantum Physics**

@Pari. Another fake ? Where did you get theta: 2*B*t and phi: 3*pi/2 from ?

**Quantum Physics**

Theta=pi Phi=s*o*B

**Quantum Physics**

Theta = 2bt Phi = pi/2 imgur dot com/eMrPvfk

**Quantum Physics**

pi/2 B*t and 2*B*t were tried long time ago, and failed. Anons 234 idea about conversion of |0> to |+> / |-> basis was tried and yielded e^(2Bt)|1>. The grader does not take that answer equivalent to pi 2Bt.

**Quantum Physics**

It is coming from the expression: (1/(sqrt(s*H*i*t)))*(p*o*o*p)

**Quantum Physics**

You know where it is coming from, don't you?

**Quantum Physics**

This is a special optimization question. You just leave both fields blank and click submit. The grader will figure the correct answer for you for theta, and will simply mark the blank phi as correct. try this!

**Quantum Physics**

OK, theta is f*a*r*t/2

**Quantum Physics**

Well try it and you'll see.

**Quantum Physics**

Since phi is irrelevant, you must leave it blank. The grader is intelligent and will mark it as correct.

**Quantum Physics**

The answer, my friend, is blowin' in the wind, the answer is blowin' in the wind.

**Quantum Physics**

Yes

**Quantum Physics**

They will both be 0 because X is perpendicular to z so the field doesn't effect it. The transformation by X doesn't either because it is still around the z axis.

**Quantum Physics**

Using the formula for the state psi under the act of a hamiltonian, you deduce that theta = pi and psi = -bt. However the -bt needs to be changed. think about why it needs to be changed

**Quantum Physics**

Sorry about the mistake earlier i copied down the wrong answer, that was an answer from a previous attempt. The correct answer has already been stated on here.

**Quantum Physics**

theta = pi phi = 0

**Quantum Physics**

8d) Theta = pi Phi = 2*b*t

**Quantum Physics**

i tried theta = pi and phi = -b*t and theta = pi and phi = -2*b*t try it with 2bt

**Quantum Physics**

Im certain theta is correct, unsure about phi. it is not -B*t or -2bt. try 2bt

**Quantum Physics**

theta = pi (8D)

**statistics**

According to the Journal of the American Medical Association, the doctors found that in the week before and the week after Thanksgiving, there were 12,000 total deaths and 6062 of them occurred in the week before Thanksgiving. Construct a 95% confidence interval of the proport...

**statistics**

The National Highway Traffic Safety Administration analyzes the crash test data for new cars. One variable measured is the severity of the injury due to a collision. The higher the severity, the higher the points assigned. Assume that the injury rating is normally distributed ...

**Statistics**

According to the American Automobile Association (AAA), the mean cost of a gallon of regular unleaded fuel in 2007 was $2.835. AAA noted that the standard deviation of the fuel price was $0.15. A random sample of n=100 gas stations is selected and the mean gas price is analyze...

**Math**

I made a 95 on a test of 20 questions, but it took 35 tries. What is my real grade?

**math**

A round tank hold 550 gallons filled to the brim. Its capacity is 10 gallons for every inch in height. How high is the tank in inches, in feet. How high would you fill it get to the 170 gallon level?

**axia**

a=p(1+r)^n p=$4000,r=0.10, and n=2years at the end of 2 years A is

**math**

13 cents for A 12 cents for B. total protein greater than twelve grams. Total fat less than eight grams. Total grams less than thirty five grams. .5 grams protein and .3 grams fat for A. .6 grams protein and .2 grams fat for B. what is optimal cost

**Business 100 **

select an organization with which you are familiar and discuss the impact of that organization's level of social responsibility on a stakeholder group of your choice

**Microbiology**

How are algae harmful to humans?

**math**

the area of triangle wxz in the diagram below is 48 cm2. what is the perieter in centieters of triangle wxz

**Statistic**

You are the microbiologist at a national food processing chain. Two independent subcontractors are bidding to produce your latest food item that should really boost sales. It is your job to determine which plant should get the bid based on their microbial cleanliness of their ...

**Statistic**

You have been screening compounds with the Ames test to determine if they are mutagenic. If a compound is mutagenic, more colonies will grow in the presence of the mutagen. You have obtained the following data from triplicate samples: Number of mutant colonies Control: 55, 59,...

**Statistic**

Your microbrewery is not producing beer quickly enough. You have been conducting an experiment on the relative growth rate of the two yeast types by measuring the turbidity, using absorbance units, of the growth medium. You obtained the following two data sets. a. Yeast 1: 0.1...

**Biology**

Explain how skin, bones and muscles are related to each other and Why is this relationship important to the understanding of the skeletal and muscular systems?

**biology**

Propose a reason why you would see several differences between different slides of skin

**Biology**

If all nerves respond to stimuli why can’t your eyes “hear” sound and your ears “see” light?

**Biology**

If the doctor presses on the right hypochondriac region, what organ is the doctor likely pressing on?

**Biology**

Why is proper microscope technique important for studying Anatomy and Physiology?

**Microscope**

True or False? Resolution decreases as the amount of light coming in on the object increases?

**Biology**

Which of the following organs would not be visible if you cut the body in a mid-sagittal section? Explain? a. Brain b. stomach c. heart d. kidneys

**Biology**

I just want to know if my answers are right for this folowing: 1. The nose is MEDIAL to the ears. 2. The elbow is DISTAL to the shoulder and PROXIMAL to the wrist. 3. The heart is ANTERIOR to the spine. 4. The stomach is DEEP to the ribs. 5. The pinky finger is DISTAL to the t...

**Physics 1**

Chap. 11, #16. (II) A 0.60-kg mass vibrates according to the equation where x is in meters and t is in seconds. Determine (a) the amplitude, (b) the frequency, (c) the total energy, and (d) the kinetic energy and potential energies when x = 0.30 m.

**Physics 1**

(II) How close to the edge of the 20.0-kg table shown in Fig. 9–47 can a 66.0-kg person sit without tipping it over?

**Biology**

Briefly describe what effect you expect each of the following variables to have on enzymatic activity. 1. pH of 3.0 2. decrease in temperature 3. increase in substrate concentration 4. increase in enzyme concentration 5. addition of phenylthiourea(PTU)

**Math/ Physiology**

Why must your line intersect the origin of the graph ( zero concentration equals zero absorbance)? Explain

**Math/ Physiology**

Why do you draw a linear graph of absorbance versus concentration even though your experimental values deviated slightly from a straight line?

**College Algebra**

Solve: x^2e^x+x e^x-e^x=0

**statistics**

which has a larger standard deviation: the distribution of weekly allowances to 12-year olds or the distribution of monthly household mortgage payments?

**chemistry **

How many moles of ammonia gas can be produced from the reaction of 3.0L of N2 and 3.0L of H2 according to the following equation: N2(g) + 3H2(g)---> 2NH3(g)?

**Physics**

The answer is 1440 N/C

**ENG-1B**

Is the climax on "The Story of an Hour by Kate Chopin artistically effective?Explain in 7 to 10 sentences

**Physiology**

Name a disease caused by a defect in the mitochondria and describe the symptoms. In both cases, the disease may refer to a structural defect in the organelle, or some type of abnormal activity that takes place inside the organelle.

**Physiology**

Name a disease caused by a defect in the lysosome and describe the symptoms.

**Physiology**

Indicate whether the following circumstances would tend to increase, decrease or have no effect on the rate of enzyme activity. 1.adding more substrate but keeping the amount of enzyme of the same 2.adding more enzyme but keeping the amount of substrate the same 3. adding a co...

**Physiology**

Anesthetics such as ether, chloroform and nitrous oxide reduce responsiveness of cells by blocking ion channels and altering other properties of cells. What chemical property of these molecules enables them to easily enter cells?

**Physiology**

Prostaglandins are formed as part of the inflammatory response, and are often formed after a cell has been damaged. From what cell organelle are prostaglandins formed?

**Physiology**

Why do cells tend to die if their lysosomes are damaged and break open?

**Physiology**

The muscle cells of a trained athlete tend to have more mitochondria than those of a couch potato. Why?

**Physiology**

Briefly answer the question about cellular processes. (Hint: think about the function of the cell in question.) Cells in the pancreas, which makes a lot of digestive enzymes, tend to have a lot of rough endoplasmic reticulum. Why?

**Chemistry**

what if you want to calculate the number of moles ammonia gas from 3.0L of H2 and 3.0L of N2

**english-1B**

Is the climax on "The Story of an Hour by Kate Chopin artistically effective?Explain in 7 to 10 sentences.

**Physiology**

What is the volume of 0.23 kg of pure water?

**Physiology**

Pure gold has a density of 19 g/ml. If you bought a gold ring and found it had a volume of 0.3 ml and it weighed 5.7 grams, is it real gold? Show me your calculation

**Chemistry**

Experiment on Titration of Acids and Bases Suppose some deionized water was left in the buret before it was filled with the oxalic acid solution you were using as a primary standard. When you perform the standardization of sodium hydroxide in Part 3, how would the excess water...