Posts by samuel

Total # Posts: 281

physics
Light falls on a photoelectric surface that has a work function of 2.90 eV. If the voltage required to stop the ejected electrons is 0.210 V, what is the wavelength of the incident radiation?

geometry
Two sides of a triangle measure 8 and 15. How many integer values can be assigned to the third side so that all the angles in the triangle are acute?

economics
some study guide questions i am stumped on 1 uncertainty about the future is likely to a increase current spending b either increase or decrease c decrease current spending d no impact on current spending think it's d 2 as the general price level increases the amount of ...

chemistry
a) Aluminum Chloride has a universal indicator color of red and the Ph of 4.0 b) Sodium Carbonate has a universal indicator color of violet and the Ph of 9.5. c) Ammonium Acetate has a universal indicator color of green and the Ph of 7.5 For the following salts give an ...

social studies
what did the dutch call their colony in north america

math
16-8=8=4x4=16

Chemistry
If a solution is made by mixing 50.0 moles of KOH to 3.4 kilograms of water, what is the solutions molality?

Chemistry
If a solution is made by mixing 50.0 moles of KOH to 3.4 kilograms of water, what is the solutions molality?

Chemistry
If a solution is made by mixing 50.0 moles of KOH to 3.4 kilograms of water, what is the solutions molality?

Science(Please Help it's on my TEST!!)
What angle would a projectile have to be shot at so that it will go twice as high as it will far

Science(Please Help it's on my TEST!!)
What angle would a projectile have to be shot at so that it will go twice as high as it will far

Science(Please Help it's on my TEST!!)
What angle would a projectile have to be shot at so that it will go twice as high as it will far

physics
Uniform rod of weight 10N and length 5m is supported by ropes from points P and Q. The rope at P is attached 1.0m from end M and the rope at Q is attached 0.25m from end O. find the tensions Tp and Tq

Physics
you will first of all conevert km/h to m/s which is 105 multiply 1000 then divide by 3600= 29.7. use the formula f= ma. 1250 multiply by 9.8=12250 then use formula for work w=f multiply by distance w=12250 multiply by 29.7=363825J.

Math (Help This Will Be on My Test Tomorrow!)
What is 2x times 200-4x/3? {2x(-4x+200/3)

Functions
What is 2x times 200-4x/3? {2x(-4x+200/3)

mth
(8*)/(*-3)+7/(*-3)=8*(*-3)+7(*-3)/(*-3)+(*-3) find d l.c.m. ans=1-5*/3

Science
Diagram examples of a player dat drop a ball on d ground and bounce back to his hand

College algebra
y-y1/x-x1=m, (6,4) m=9/8. y-4/x-6=9/8, 8(y-4)=9(x-6), 8y-32=9x-54, 8y=9x-54+32 divide both by 8, 8y/8y=9x/8-22/8, Ans=y=9x/8-22/8

Physics
A car travels 2.06 km in the x-direction, then turns left 70.3 degrees to the original direction and travels an additional distance of 4.23 km. Calculate the x component of the car’s net displacement. Let : d1 = 2.06 km, theta = 70.3 degrees , and d2 = 4.23 km.

algebra
1<3x+5<12

5th grade math
144

college
A 5.1 kg object initially at rest at the origin is subjected to the time-varying force shown in Figure P5.25, with the vertical axis in 4 N increments. What is the object's velocity at t = 6 s?

Probability and Statistics
Can someone tell me what formula I should use? The number of milligrams of tar in filtered and unfiltered cigarettes is being compared. The following cigarettes are pulled to be part of the samples: Filtered: bunch of data Unfiltered: bunch of data The first question is create...

Statistics
A popular casino in Windsor estimates that the chance that someone sitting at one of their Black Jack tables has a 0.35 probability of winning a given hand. Assume that all games played are independent. a. Isaac decides to play until his first win, and bets $50 per game. When ...

Literature
Can anyone point me in the right direction? I need to know which play made the line Drama Kings and Queens unite!. I have tried using several search engines with no avail. Just a hint at the author would be good.

English Literature
Can anyone tell me which Play the Phrase, "Drama Kings and Queens, Unite!" came from ar at least point me in the right direction?

math
Aspider travels at a speed of 1.17 miles per hour. At this rate, about how far can a spider travel in 3 hours?

Chemistry Help
using your method i got 0.45moles,is that correct?

Chemistry Help
If it takes three "breaths" to blow up a balloon to 1.2 L, and each breath supplies the balloon with 0.060 moles of exhaled air, how many moles of air are in a 3.0 L balloon? i am trying to use v1/n1=v2/n2 but i am stuck, can u help? thank you

Physics
question one

spanish 1
durante el dia (pasar) tiempo con mis amigos, what would be the form for the subject

Chemistry
1. You have gone back in time and are working with Dalton on a table of relative masses. Following are his data: 0.602g gas A reacts with 0.295g gas B 0.172g gas B reacts with 0.401g gas C 0.320g gas A reacts with 0.374g gas C a) Assuming simplest formulas (AB,BC,AC) construct...

Chem 101 science
Rank the following samples in number of atoms from least to greatest. a) 2 mol of K atoms b) 48 g of S c) 27 g of Be d) 50 g of Na

Chem 101. Science
Rank the following samples in mass from least to greatest. a) 2 x 1023 S atoms b) 0.25 mol of Cu atoms c) 2 mol of N atoms d) 6 x 1023 Na atoms

Chem 101
Consider the reaction of 82.0 g of oxygen as follows: 4Fe + 3O2 2Fe2O3 How many moles of oxygen react? How many moles of iron must react? How many moles of product form? What mass of product forms?

arithmetic
An auditorium has 20 rows of seats.These are 20 seats in the first row,21 in the second row and 22 in the third row and so on.how many seats are there in all rows?

MATH
ADDING LITERS 1/2 , 3/4 AND 7/8 SOLUTION; 1/2=4/8, 3/4=6/8 AND 7/8 ANSWER? 14/8 PUZZLE!

Grammar and Composition
The poor children of the village were left destitute. look up the definition and you will see by the examples that this is the correct usage.

Biology
How does temperature affect the solubility of oxygen in water?

physics
find the resultant of vectors A of magnitude 10units in the direction N40E and B of magnitude 8units in the direction S30E

economics
Given that the monopolist demand curve is Qd=200-2P, TC=#900 and P= #55. What is the total profit?

AP BIO
If a particular experiment were known to have a transformation efficiency of 3 x 103 bacteria/ìg of DNA, how many transformant colonies would be expected to grow on the LB/amp/ara plate?

business
Which financial ratios would you consider most useful? Would these ratios be different than the ones you would consider useful as an investor? Why or why not?

Science
Why are spurgeons important to theie ecosystem?

Financial Engineering
Describe a potential arbitrage strategy if a put price is the same as the negative of a forward if the strike are the same. You need to specify the number of units you would long/short for each instrument, initial cash flow, and final cash flow. An arbitrage oppotunity arises ...

Calculus
A boat is pulled into a dock by a rope attached to the bow of the boat and passing through a pulley on the dock that is 1 m higher than the bow of the boat. If the rope is pulled in at a rate of 1.4 m/s, how fast is the boat approaching the dock when it is 9 m from the dock?

Calculus
A voltage V across a resistance R generates a current I=VR. If a constant voltage of 4 volts is put across a resistance that is increasing at a rate of 0.3 ohms per second when the resistance is 4 ohms, at what rate is the current changing? (Give units.)

Calculus
At noon, ship A is 20 nautical miles due west of ship B. Ship A is sailing west at 23 knots and ship B is sailing north at 17 knots. How fast (in knots) is the distance between the ships changing at 5 PM? (Note: 1 knot is a speed of 1 nautical mile per hour.)

science
B

chem
why does fluorine have a higher ionization energy than iodine?

chem
why do elements in the same family generally have similar properties?

chem
what does the heating curve of ethanol look like? im really confused about this...

CHEM
on a heating curve graph...what factors determine the lengths of the flat regions of the graph and slope of the curve between the flat regions

Statistics
a

French
What can you find in Santa Claus' bag? descramble "ELASEL" (in french) I need help....

s
unscramble "elasel" in french; unscramble "ionmaes" in french. Thank you

chem
22.25 ml?

chem
3.56mL?

chem
What volume of 0.200 M H2SO4 will be needed to neutralize 50mL of 0.178 N NaOH? i don't even know how to start

Social Studies
When water sinks into the soil, what does it become?

college(natural disasters)
How can the magnatic record inside a valcanic roskbe used to determine the latitude at which the lava cooled?

natural disasters
how can the magnatic record inside a valcanic roskbe used to determine the latitude at which the lava cooled?

English
For example, when people ask "We don't have to hand in the assignment right?" Why do some people answer "No." (They meant the assignment does not have to be handed in.) But if so, should the answer be "Yes." (Yes, that's right, we don'...

Math
Dear Readers, I am a 6th grader that recently took a math test. I got a question wrong, and I think it was because I don't know the definition to the question. Can you please tell me what an interval in mathematical terms is. Please give me something a 6th grader can ...

statistics
Which of the following is an example of nominal data? a. ocean temperature at seven beaches along the east coast of the U. S. b. 1st, 2nd, and 3rd place finishers of the 2005 Boston Marathon c. morning commute (in miles) of professors at DeVry University - Phoenix d. account ...

5th grade
bbbnbbvhv

calculus
Find the points on the curve y = 2x^3 + 3x^2 - 12x + 1 where the tangent is horizontal

physics
Alley club-ax consists of a symmetrical 8 kg stone attached to the end of a uniform 2.5 kg stick that is 98 cm long. The dimensions of the club-ax are that the stcik is 80 cm across and the stone is tied to the stick is 18 cm long. How far is the center of mass from the handle...

physics
Three balls A, B, and C, with masses of 3 kg, 1 kg, and 1 kg, respectively, are connected by massless rods. What are the coordinates of the center of mass?

physics
A water molecule consists of an oxygen atom and two hydrogen atoms. Oxygen has a mass of 16 atomic units (u) and each hydrogen has a mass of 1 u. The hydrogen atoms are each at an average distance of 96 pm ( 96 x 10 -12 m) from the oxygen atom, and are separated from one ...

HISTORY
what features of the welfare state did the new deal create?

physics
A pendulum consists of an object of mass 1.07 kg that hangs at the end of a massless bar, a distance 1.14 m from the pivot point. Calculate the magnitude of the torque due to gravity about the pivot point if the bar makes an angle of 22° with the vertical. torque = ...

physics
An athlete at the gym holds a 4.33 kg steel ball in his hand. His arm is 75.0 cm long and has a mass of 5.28 kg. What is the magnitude of the torque about his shoulder if he holds his arm straight out to his side, parallel to the floor? Responses Physics - bobpursley, Saturday...

chemistry
Phosgene (COCl2) is an extremely poisonous gas that was used extensively in World War I as a chemical warfare agent. At 300oC, phosgene decomposes to carbon monoxide and chlorine with a Kp = 6.8 x 10-2. Calculate the pressure in the vessel at equilibrium after placing 5.00 ...

HISTORY HELP
I'm reading my book and from what i'm getting here is that the progressives demanded a more activist government but what im not understanding is how they justified their demands.

Algebra
Write the slope-intercept form of an equation for each line, given either the slope and the y-intercept or the coordinates of two points. (5, -3) and (-4, -3)

Algebra
Determine whether the graphs of the equations are parallel, perpendicular, or neither. y=-x+2 y=-x-3

drug chart help
Does anyone know a site that has information about drugs (narcotics, stimulants, depressants, hallucinogens, etc...) with the following info: Name of Drug Slang Name Source How it Looks How it's Used Short Effect Duration Physical (Yes/No) Psychological Addiction (Yes/No) ...

Physics
Work is transferred, not made.

physics
A:0.124764 meter

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