Thursday
October 27, 2016

# Posts by R

Total # Posts: 165

Math
How do I evaluate sinx-4 since I can't do arcsin4. How do I interpret that?
September 21, 2016

Math
Solve (degrees): 3sin^2(x)-11sin(x)-4=0 It's just a quadratic but doesnt wprk?
September 21, 2016

Chemistry
Aqueous sulfurous acid H2SO3 and aqueous sodium chloride are formed by the reaction of aqueous sodium sulfite Na2SO3 and aqueous hydrochloric acid HCl . Write a balanced chemical equation for this reaction.
August 19, 2016

Analytical Chemistry
What volume, in liters, of 1.09 M KOH solution should be added to a 0.102 L solution containing 9.35 g of glutamic acid hydrochloride (Glu, FW = 183.59 g/mol; pKa1 = 2.23, pKa2 = 4.42, pKa3 = 9.95) to get to pH 10.26? Should I start with molar concentrations in the beginning (...
July 5, 2016

earth science
When I bumped the table, the coffee in my cup spilled out. Newton's _____ law explains this reaction. 1st 2nd 3rd
May 24, 2016

Physics
A circular parallel plate capacitor with plate radius 8.2cm and plate separation .15mm is connected in series with a 16V ideal battery and a 790 ohm resistor at t=0. At time t=2.4e-6 seconds, what is the induced magnetic field that lies along the outer edge of the capacitor? I...
April 19, 2016

Physcs
A circular parallel plate capacitor with plate radius 8.2cm and plate separation .15mm is connected in series with a 16V ideal battery and a 790 ohm resistor at t=0. At time t=2.4e-6 seconds, what is the induced magnetic field that lies along the outer edge of the capacitor? I...
April 19, 2016

English grammar
1.This figure is wrong;please strike it-----(fill in with suitable preposition)
March 29, 2016

English grammar
1.Some of the pie---(is,are)missing. 2.Alof the pies---(is,are)missing. Fill in the blanks with suitable forms of verbs.
March 27, 2016

English grammar
Thankyou so much for your help..
March 21, 2016

English grammar
1.Honour or reputation ---(is,are)dearer than life. Which of the two words is the most appropriate?
March 21, 2016

Math
Thanks!
March 17, 2016

Math
Is 1.256 rational or irrational? Rational*** Irrational
March 17, 2016

Geometry
I have a rectangle MNOP ~ rectangle STUV. What is the length of line TU?? First rectangle is MNOP with 10 on top and 4 on the side. Second rectangle is STUV. With the top marked X for the unknown number and n the side is 6. I need help solving this. Do you guys think you can ...
March 5, 2016

Biology
In the question section of my chapter "Strategies for Enhancement of Food Production" i got d question "What is Quarantine? Give one example of it." I found the what is the quarantine part but didn't get examples... Not even in my book. Plz help !
February 7, 2016

Functions 11
Find the value(s) of k so that each function has 2, 1, and 0 roots f(x)=kx^2-9x+6 f(x)=3x^2+kx+12 f(x)=9x^2+3x+k I know to use the discriminant but am not sure where to go from there
January 27, 2016

Physics
How many coulombs pass through a wire that carries a current of 3.2 A for 5.0 h? I=Q/t Q=It Q=3.2*5*60 Q=960 I am told this is not the correct answer.
January 18, 2016

Physics Sound Waves
A fire truck emitting a 450 Hz signal passes by a stationary detector. The difference in frequency measured by the detector is 58 Hz. If the speed of sound is 345 m/s, how fast is the fire truck moving? The answer should be 22 m/s but I don't even know where to start. ...
December 16, 2015

Chemistry. I got the wrong answer. Plz help
Write out your balanced equation for the reaction first. 2Na + Cl2 --> 2NaCl ? 142g 234g Mols of Cl2 142g / 71 g/mole = 2 mol of Cl2 Because of the balanced equation, one mol of Cl2 requires 2 mols of Na for all of the chlorine to be used up ... 4 mol of Na 4 mol * 23 g/mol...
December 8, 2015

Chemistry. Plz Help!
g/mols is the molar mass of the substance. You can find the molar mass by taking the sum of the atomic masses in the substance.
December 8, 2015

Math
You know: l = w + 8 P = 54 = 2(w + l) plug w + 8 in to the perimeter equation
December 8, 2015

Physics Energy
I have come to believe the answer given was wrong after seeing so many other errors in the answers.
December 8, 2015

Physics Energy
A baseball player puts a baseball on a batting tee. The baseball bat is able to deliver 4.0x10^5 W of power and is in contact with the ball for 0.70 ms and a distance of 1.4 cm. The mass of the ball is 145 g. What is the next force applied to the ball, and what is its average ...
December 8, 2015

Report Citation Style
I was wondering if someone can identify this citation style: Author. (Date). Doc Title. Title Bar Title. Retrieved ____, 2015 from <URL ADDRESS>.
December 8, 2015

Math
"Half the measure of the angle is 25 more than one third the measure of the complement. Find the angle" I don't understand how to set up and solve this at all.
September 30, 2015

Math
*300 degrees around the circle
September 14, 2015

Math
Your school’s marching band is performing at halftime during a football game. In the last formation, the band members form a circle 100 feet wide in the center of the field. You start at a point on the circle 100 feet from the goal line, march 3008 around the circle, and...
September 14, 2015

Maths
Thank you!
June 8, 2015

Maths
Standing on top of a slope of 5 degrees, i see the top of a building and an angle of elevation of 35degrees15'. i am 160cm tall and it is 12m from the building base. How tall is the building?
June 8, 2015

Math, statistics
Problem 1: The PDF of exp(X) (6/6 points) Let X be a random variable with PDF fX. Find the PDF of the random variable Y=eX for each of the following cases: For general fX, when y>0, fY(y)= Solution: f_x(ln(y))/y When fX(x) = {1/3,0,if −2<x≤1,otherwise, we ...
March 31, 2015

math, algebra
If Will gives Molly \$9 dollars he will have the same amount of money as her. If Molly give Will \$9, the ratio of money she has to the money will has will be 1:2. How much money does will have in the beginning? Can you give me an explanation of each step, please? I'm having...
January 28, 2015

math
Thanks, Steve :D
January 15, 2015

math
Bella spent 4/7 of her money on a dictionary and 3 identical books. She spent 1/6 of the remainder on a journal that cost \$7. How much did she spend on the dictionary and 3 books? If 3/8 of the cost of the dictionary was the same as 1/2 of the total cost of 3 books, how much ...
January 15, 2015

psychology
Ms. Sue is a nasty piece of work.
December 15, 2014

math
3/4 of seats in a concert hall were occupied. The ratio of adults to children was 7:3. If 90 more adults attended the concert, the number of adults would be 3 times of number of children. How many seats were in the concert hall?
November 23, 2014

physics
A bear spies some honey and takes off from rest, accelerating at a rate of 1.9 m/s^2. If the honey is 17m away, How fast will the bear be going when he gets to the honey?
October 22, 2014

chemistry
How many grams of HCl are formed from reaction of 3.58g of H2 with 8.90g of Cl2?
October 16, 2014

Social Studies
anonymous as always
October 9, 2014

Chemistry
A solution of ammonia and water contains 1.60×1025 water molecules and 8.50×1024 ammonia molecules. How many total hydrogen atoms are in this solution?
October 8, 2014

CHEMISTRY
A sprinter set a high school record in track and field, running 200.0 m in 21.5s . What is the average speed of the sprinter in kilometers per hour?
October 6, 2014

Algebra1
How to do work out C+4=-24
September 2, 2014

Math
Group C ate 4/6 of a pizza, or 2/3. Checks out: Grp A = 6/6 (1 pizza); Grp B = 8/6 (1 1/3 pizzas); Grp C = 2/3 of a pizza. The info provided means we can solve for the portions of pizzas consumed, but not in "units" of slices. Check by adding up the fractions: 18/6 = 3.
April 24, 2014

Aiden has 7/10 cup cereal, 2 2/3 cups pretzels, 1/6 cup raisins and 2/5 cup chocolate chips to make a party mix. How much party mix will he have in all if he uses all the ingredients he has?
April 13, 2014

Science
1) b. fossils 2) d. the discovery of abrupt change in DNA in a species after many generations of no change. Yes, these are correct, I've done them myself.
November 15, 2013

Calc
Let F(x, y, z) = z tan−1(y^2)i + z^3 ln(x^2 + 10)j + zk. Find the flux of F across S, the part of the paraboloid x^2 + y^2 + z = 19 that lies above the plane z = 3 and is oriented upward. Thanks! STudying for a quiz... *tan−1 is tan^(-1)
November 10, 2013

Math
20+40=60
October 9, 2013

math
Let V be the volume of the solid that lies under the graph of f(x,y)= (52 − x^2 − y^2)^1/2 and above the rectangle given by 4 ≤ x ≤ 6, 0 ≤ y ≤ 4. We use the lines x = 5 and y = 2 to divide R into subrectangles. Let L and U be the Riemann ...
September 14, 2013

ECON
For your twenty-first birthday, your grandfather offers you a gift of \$1000 today. However you have the choice of waiting 3 years and receiving \$1500 or waiting 5 years and receiving \$3000. If your money grows at a rate of 8 percent compounded annually, which alternative ...
September 7, 2013

physics
I still can't believe Marshawn Lynch didn't run the ball
June 30, 2013

math
how do i find the measure of central angle rounded to the nearest degree then showing using graphs and degrees
May 10, 2013

Physics
Consider the stability of a ladder of mass m and length L leaning against a wall. A painter wants to be sure the ladder will not slip across the floor. He knows that the frictional force exerted by the floor on the bottom end of the ladder is needed to keep the ladder in ...
May 8, 2013

Physics
^^ That is incorrect
May 8, 2013

Physics
The sled is stuck in the snow. A child pulls on the rope and finds that the sled just barely begins to move when he pulls with a force of 24 N, with the rope at an angle of θ = 33° with respect to the horizontal. The mass of the sled is 14 kg. If the child continues ...
May 8, 2013

Physics
The roller coaster starts with a velocity of 16 m/s. One of the riders is a small girl of mass 26 kg. Find her apparent weight when the roller coaster is at locations B and C. At these two locations, the track is circular, with the radii of curvature given. rB = 10 m, rC = 20 ...
May 8, 2013

PHYSICS
A truck has a momentum of 5.8x10^4 Ns [S]. An average force of 2.2x10^3 N [S] increases the truck's momentum for the next 8.8s. What is the impulse and final speed of the truck?
April 5, 2013

PHYSICS
Max is throwing a 57g tennis ball upward and hitting it (with a racket) when it reaches the top of its flight. If the racket exerts an average force of 440N on the ball, find the speed of the ball after the collision (if they are in contact for 4.5ms)
April 5, 2013

PHYSICS
A baseball of mass 148g is travelling at 35.0m/s [E] collides with a baseball bat. the collision lasts for 1.10ms. After the collision, the baseball travels at 52m/s [W]. What is the force of the bat on the baseball
April 5, 2013

physics
An apple (m = 125g) is attached to a vertical spring (from a ceiling) that has a k value of 55 N/m. The apple is held up so the spring is un-stretched. When the apple is released, a) how far will the spring stretch? b) How fast will it be going when it has fallen 4.0cm?
March 28, 2013

physics
A horizontal spring with k = 45 N/m is attaches a 1.0kg block to a spring hung from the ceiling. A block is pulled down to a spot that is 30.0cm from the spring's rest position. What is it's new acceleration?
March 28, 2013

physics
A compact car can achieve a maximum acceleration of 3.2 m/s^2. If dice were hanging from the rearview mirror, what angle would they swing on?
March 24, 2013

physics
A small marble is suspended from a 45 cm string and creates a conical pendulum (like in the picture beside question #57). The marble revolves at constant speed in a horizontal circle with a 6.5 cm radius. Calculate the marble's velocity along the circle.
March 23, 2013

physics
A ball of mass 0.750 kg is attached to the end of a 1.20m long cord that can withstand a maximum tension of 50.0 N. If swung in a vertical circle, what is the maximum velocity the ball can achieve before the string breaks?
March 23, 2013

Math
Put two in opposite corners, then two on each side. The corners ones touch two sides....resulting in three marbles on each side.
February 18, 2013

Science
Use the following values for mass and charge: an electron has mass me = 9.11×10-31 kg and charge -e, a proton has mass mp = 1.67×10-27 kg and charge +e, an alpha particle has mass malpha = 6.65×10-27 kg and charge +2e, where e = 1.60×10-19 C. An ...
February 6, 2013

Science
Use the following values for mass and charge: an electron has mass me = 9.11×10-31 kg and charge -e, a proton has mass mp = 1.67×10-27 kg and charge +e, an alpha particle has mass malpha = 6.65×10-27 kg and charge +2e, where e = 1.60×10-19 C. An ...
February 6, 2013

french
how to make "nous allons en classe pendant le week-end" negative
December 4, 2012

Physics
An electrical generating plant operates at a boiler temperature of 220 deg C and exhausts the unused heat into a nearby river at 18 deg C. what is the maximum theoretical efficiency of the plant?
November 19, 2012

Physics
Would the answer be B because the temperatures are denoted in deg C? 556K - 273 = 283 deg C.
November 19, 2012

Physics
A pond with a flat bottom has a surface area of 820 m^2 and a depth of 2.0m. on a warm day, the surface water is a temperature of 25 deg C, while the bottom of the pond is at 12 deg C. Find the rate at which energy is transferred by conduction from the surface to the bottom of...
November 18, 2012

Physics
A student drops two metallic objects into a 120 g steel container holding 150 g of water at 25°C. One object is a 200 g cube of copper that is initially at 85°C, and the other is a chunk of aluminum that is initially at 5°C. To the surprise of the student, the ...
November 18, 2012

Physics
How long would it take a 1.00 x 10^3 W heating element to melt 2.00kg of ice at -20 deg C, assuming all energy is absorbed by the ice?
November 17, 2012

Physics
How long would it take a 1.00 x 10^3 W heating element to melt 2.00kg of ice at -20 deg C, assuming all energy is absorbed by the ice?
November 16, 2012

Chinese
This character is ma (neutral), correct? Thank you. 吗
August 29, 2012

Algebra 1
You're welcome! Sorry I couldn't explain it to you better earlier.
August 29, 2012

Algebra 1
Okay. For this type of problem, you'll need to make sure your two numbers can compare. This means you're going to have to change your decimal (.3) to a fraction. .3 is said, "three tenths," So you take your 3 and but it over the 10 (3/10). Now you have 3/14 ...
August 29, 2012

Algebra 1
Please tell me what you don't understand, Dani.
August 29, 2012

Algebra 1
I made a mistake on my answer. A larger denominator would be the smaller number if the numerators are the same.
August 29, 2012

Algebra 1
Damon, I think you misunderstood me. I realize that .3 is equivalent to 3/10. I was answering the question, not responding to YOUR answer.
August 29, 2012

Algebra 1
You have 3/14 and you're comparing that to 0.3. This means you will have to convert .3 to a fraction. Find the common denominator. You will clearly see the answer. Remember, whenever your numerators are the same, the number with the larger denominator is larger. The ...
August 29, 2012

science
"The cytoplasm gives the cell its shape"
August 27, 2012

acct
Assume that equipment with a balance in the equipment account of \$7,200 is discarded. The balance in the Accumulated Depreciation account is \$4,900. Cash is received for the equipment totaling \$2,600. Please give the journal entry to record the write-off of equipment discarded.
June 24, 2012

college mathematics\
greater than 3: 3/6=1/2 less than 5: 4/6=2/3
June 11, 2012

biology
In rabbits, there are four different versions of gene for coat color. What pattern of inheritance is this?
May 24, 2012

statistic
p(5 or club)
May 23, 2012

physics
Two small, identical metal spheres contain excess charges of -10.0 x 10^-6 C and 6.0 x 10^-6 C, respectively. The spheres are mounted on insulated stands and placed 0.40 m apart. Determine the magnitude and direction of the force between the spheres.
May 16, 2012

pre-calculas
An object is situated so that its center of mass is located at the origin.Three forces X,Y, and Z act on the object at the same time. Force X passes through the point (-3, -4), forve Y passes through the point (5,-12), and force Z passes throught the point (15,8). Forces X,Y, ...
May 10, 2012

physics
A speeder traveling at 47 m/s passes a motorcycle policeman at rest at the side of the road. The policeman accelerates at 2.59 m/s2. To the nearest tenth of a second how long does it take the policeman to catch the speeder?
February 20, 2012

physics
A car accelerates at a constant rate from zero to 28.7 m/s in 10 seconds and then slows to 17.5 m/s in 5 seconds. What is its average acceleration to the nearest tenth of a m/s2 during the 15 seconds?
February 20, 2012

M says that every number in the nineties is composite.J says that one number in the nineties is prime. who is correct?
January 11, 2012

English
his test in particular is outrageous. I too am in Connections and have attended every live lesson none of which prepared me for this exam. It is very, very objective with the questions being non specific of which I can argue more thanone possible answe and depending on my ...
January 9, 2012

world geography
Rocky Mountains
December 22, 2011

physics
A man throws a ball straight up in the air with an initial speed of 24 meter per second. How long does it take for the ball to return to him? What is the maximum height of the ball above the point where it was thrown?
December 6, 2011

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