Sunday
December 21, 2014

Posts by Rob


Total # Posts: 343

Essay
I need to do an essay but need to know if it is usually blank percent rainy or blank persent sunny usually in Port Saint Lucie? Can you help or give me a website that gives me percentages on how it usually is.
January 3, 2012

calculus
prove that 5x - 7 - sin3x = 0 has at least one zero and prove that it has exactly one real zero. How am I supposed to show my work for this? I don't really understand how to show my work for the IVT. Without that I can't do any work for the MVT.
December 16, 2011

Math
It's D!
November 29, 2011

math
just the basic formulas for area, length, and width
November 28, 2011

chemistry
What is R and T stand for?
November 26, 2011

physics
One gram of water changes from liquid to solid at a constant pressure of one atmosphere and a constant temperature of 0°C. In the process, the volume changes from 0.90 cm3 to 1.10 cm3. The work done by the water is .02J, but I'm not sure how to find the internal energy...
November 17, 2011

Math
Random variables X and Y are both normally distributed with mean 100 and standard deviation 4. It is known that random variable X+Y is also a normal distribution. a. What is the mean of X+Y? b. What is the standard deviation of X+Y? I see that the mean is 200 but I don't ...
November 15, 2011

6th drade math
There are 7oz of suger in a suger 16oz box of honey.What percent of honey is suger? Round to the nearest percent.
November 2, 2011

physics
because they are opssite forces acting on eachother
October 31, 2011

Chemistry
How much energy is associated with a photon in the gamma ray region of the spectrum with a frequency of 6.6*10^5s^-1
October 31, 2011

Chemistry
Calculate the frequency of a photon of orange light whose wavelength is 6.2*10^5m. (meters)
October 31, 2011

Discrete Math
A factory makes automobile parts, 5C7, 1O6 or 3Z0, which are of 5,000 parts, what is the minimum number of parts with the same serial number?
October 27, 2011

chem
energy of a proton divided by its frequency equals?
October 23, 2011

math
10 to the 9-9 power = ? How do you come to the answer =1?
October 19, 2011

Science
If earths mass were reduced by 1/2 , but its radious satyed the same , how much would your weight change ? Would it also be reduced by half ?
October 17, 2011

general chem
Calculate the molarity of a solution made by dissolving 12.5 grams of Na2CrO4 in enough water to form exactly 550 mL of solution. (b) How many moles of KBr are present in 150 mL of a 0.275 M solution? (c) How many milliters of 6.1 M HCl solution are needed to obtain 0.100 mol ...
October 9, 2011

general chem
Calculate the molarity of a solution made by dissolving 12.5 grams of Na2CrO4 in enough water to form exactly 550 mL of solution. (b) How many moles of KBr are present in 150 mL of a 0.275 M solution? (c) How many milliters of 6.1 M HCl solution are needed to obtain 0.100 mol ...
October 9, 2011

general chem
Using the activity series (Table 4.5), write balanced chemical equations for the following reactions. If no reaction occurs, simply write NR. (a) Nickel metal is added to a solution of copper (II) nitrate; (b) a solution of zinc nitrate is added to a solution of magnesium ...
October 9, 2011

general chem
THank YOu Dr.BoB222
October 9, 2011

general chem
Determine the oxidation number for the indicated element in each of the following compounds: (a) Co in LiCoO2, (b) Al in NaAlH4, (c) C in CH3OH (methanol), (d) N in GaN, (e) Cl in HClO2, (f) Cr in BaCrO4.
October 9, 2011

algebra
how far can you simplify7(3-6y)
September 29, 2011

physics
A ball launched from ground level lands 3 s later on a level field 48 m away from the launch point. Find the magnitude of the initial velocity vector and the angle it is above the horizontal. (Ignore any effects due to air resistance.)
September 28, 2011

science
a car exerts tractive force, calculate the force available for acceleration
September 25, 2011

Genetics
1) A White eye (w) female Drosophila is crossed with diminutive (dm) males. The F1 wild type females are then crossed to the double mutant, white eye, diminutive males and produce the following: white eye, normal size 487 normal eye, diminutive 475 normal eye, normal size 19 ...
September 20, 2011

Pen Foster
drama exam
August 12, 2011

math
find the eqt. of tangent to the curve y=-x^2+2x-10 @ the point where the curve cuts the y-axis.[ans:y=2x-10] how do i do this because they didnt give me the point...?
July 22, 2011

math
the tangent yo the curve y=x^2 +5x -2 @ the point (1,4)intersect the normal to the same curve @ the point (-3,-8) at the point P.Find the coordinates of point P.[ans: -1/3,-16/3] just give me some hint to calculate this solution.
July 22, 2011

math
in the question it say: at the point where the curve cuts the y-axis
July 22, 2011

Math
Express as a single term in simplest form: 5/2- radical 12
May 30, 2011

physics
if i crate is been dragged with 500 n of force with a 15 degree angle what would the horizontal force be?
May 29, 2011

algebra
Tina Mixes pretzels that sell for $2 a lb with cereal that sells for $3 a lb. she wants to make an 8 lb mixture to sell for $2.50. write 2 equations to represent this info. How many lbs of pretzels and how many lbs of cereal were used to make the 8 lb mixture?
May 24, 2011

Science
List advantages of the Bay of Fundy power plant
May 17, 2011

English
In the Kite Runner, why is the story about the sultans included? What is that story about?
May 1, 2011

Physics
Tom Brady passes a football – at a velocity of 50 ft/s at an angle of 40 degrees to the horizontal – toward an intended receiver 30 yd straight downfield. The pass is released 5 ft above the ground. Assume that the receiver is stationary, is isolated and that he can ...
April 25, 2011

Physics
put paper on block
April 25, 2011

Physics
You have a tiny slip of paper and a large rectangular wooden block. If you put both of them side-by-side and drop the two to the floor from the same height, the block gets to the floor first. Can you think of (and describe) three “simple” ways (using nothing, ...
April 25, 2011

Physics
You are driving your race car around a circular test track. Which would have a greater effect on the magnitude of your acceleration, doubling your speed or moving to a track with half the radius? Why?
April 25, 2011

Physics
An object is executing circular orbits of radius 0.5 m. If it completes an orbit every 3 seconds, what is its tangential speed?
April 25, 2011

Physics
f a water bed is 1.81 m on each vertical side and 30 cm high. Find its weight. The acceleration of gravity is 9.8 m/s2 and the density of water is 1000 kg/m3. Answer in units of N
April 15, 2011

physics
An acorn and tree leaf fall from the same height and time. Which reaches the ground first and why?
April 9, 2011

pharmacy tech
Determine the milliliters of water needed to prepare 2 oz of a 10% solution from a 12.5% solution and distilled water.
April 4, 2011

pharmacy tech
Determine the milliliters of water needed to prepare 2 oz of a 10% solution from a 12.5% solution and distilled water.
April 4, 2011

Physics- 2D Collisions
nitially, mass one (2.10 kg) has a velocity of 5.90 m/s and mass two (2.80 kg) is at rest. After they collide, mass one emerges at an angle theta = 33.0 degrees. What is the speed of mass one after the collision if the collision is completely elastic? (Note, there are actually...
March 29, 2011

Physics
A tennis ball of mass 0.0609 kg is served. It strikes the ground with a velocity of 52.5 m/s (117 mi/h) at an angle of 22.0° below the horizontal. Just after the bounce it is moving at 50.5 m/s at an angle of 17.7° above the horizontal. If the interaction with the ...
March 28, 2011

Stats.
An obstetrician maintains that preterm babies (gestation less than 37 weeks) have a higher variability of birth weight than do full-term babies (gestation 37-41 weeks). According to the National Vital Statistics Report, Vol. 48, No. 3, the birth weights of full time babies ...
March 28, 2011

Physics
A tennis ball of mass 0.0609 kg is served. It strikes the ground with a velocity of 52.5 m/s (117 mi/h) at an angle of 22.0° below the horizontal. Just after the bounce it is moving at 50.5 m/s at an angle of 17.7° above the horizontal. If the interaction with the ...
March 27, 2011

Math
a plane flies due north at 300 mi/h for 3 h then due west at 250 mi/h. If x represents the number of hours the plane is flying due west, determine for what values of x the plane will be more than 3700 mi from it's original point.
March 8, 2011

statistics
An obstetrician maintains that preterm babies (gestation less than 37 weeks) have a higher variability of birth weight than do full-term babies (gestation 37-41 weeks). According to the National Vital Statistics Report, Vol. 48, No. 3, the birth weights of full time babies are...
March 7, 2011

statistics
Part 1) A physical therapists wishes to determine whether an exercise program increases flexibility. He measures the flexibility (in inches) of 12 randomly selected subjects both before and after an intensive eight-week training program and obtains the following data: Before: ...
March 7, 2011

Statistics
Part 1) Exposure to dust at work can lead to lung disease later in life. In a study of 115 drill and blast workers involved in tunnel construction the mean dust exposure was 18.0 mg-yr/m^3 with a standard deviation of 7.8 mg-yr/m^3 (sample 1). Another study of 220 outdoor ...
March 7, 2011

business ethics
Ethics systems table
March 6, 2011

ENG
Know
March 6, 2011

math
If a hot dog vendor offers 18 different condiments; how many condiment combinations are there?
March 6, 2011

Math
3 pipes are used to fill apool with water .Individually they can fill that pool in 9hr ,6hr ,3hr .how many minutes will it take to fill the pool if all 3 pipes are used simultaneously?
March 5, 2011

Math
In NY the ratio of private homes to apartment is 3:5 . If all the apartments are brick made and 1/10 of the private homes are wooden what is the maximum portion of houses that may be brick made? a 15/16 b 5/8
March 5, 2011

Machanics
particles of mass 3m and 5 m hang one at each end of a light inextensible string which passes over a pulley.The system is released from rest with the hanging parts taunt and vertical.During the subsequent motion the resultant force exerted by the string on the pulley is of ...
March 4, 2011

math
particles of mass 3m and 5 m hang one at each end of a light inextensible string which passes over a pulley.The system is released from rest with the hanging parts taunt and vertical.During the subsequent motion the resultant force exerted by the string on the pulley is of ...
March 4, 2011

Math
particles of mass 3m and 5 m hang one at each end of a light inextensible string which passes over a pulley.The system is released from rest with the hanging parts taunt and vertical.During the subsequent motion the resultant force exerted by the string on the pulley is of ...
March 3, 2011

trigonometry
if the three sides of a triangle is 4,5,6 then the cosine of the angle between the sides 4 and 5 is
March 3, 2011

Math
if 20 feet pole casts 4 feet shadow then 6 feet man will cast a shadow of ((4*6)/20)= 1.2feet
March 3, 2011

Math
4*6/20=1.2 feet
March 3, 2011

accounting
did these questions ever get answered
February 27, 2011

Chemistry
Copper (II) fluoride contains 37.42% F by mass. Use this percentage to calculate the mass of fluorine in grams contained in 24.0 g of copper (II) fluoride.
February 27, 2011

chemistry
trust me im a doctor. we can make some chemistry
February 2, 2011

chemistry
AT 40 DEGREES HOW MUCH POTASSIUM CHLORIDE CAN BE DISSOLVED IN 300G OF WATER
January 20, 2011

physics
baseball thrown horizontally takes 1.1 seconds to reach the ground. What is the height at which the ball was thrown?
January 11, 2011

physics
baseball thrown horizontally takes 1.1 seconds to reach the ground. What is the height at which the ball was thrown?
January 11, 2011

physics
on a planet whose mass is twice that of earth and whose radius is same, with what acceleration will a body fall at sea level?
January 10, 2011

physics
what is tangential velocity of the earth as it travels in its orbit around the sun?
January 10, 2011

calculus
Try this way: Perimeter = 2x+2 therefore P = 2x + 2/x^2 d(perimeter)/dx = (2x^3-4)/x^3 solving for x = 2^(1/3) therefor y was given as y = x^-2 plug x into y to solve for y. y = 2^(-2/3) or y = (1/4)^(1/3) check the answer it should be 3.78
December 13, 2010

Math
factor completely 3y^3 - 12y
November 26, 2010

Microeconomics
Pharmaceutical drugs have an inelastic demand, and computers have an elastic demand. Suppose that technological advance doubles the supply of both products (that is, the quantity supplied at each price is twice what it was).
November 22, 2010

Microeconomics (full version)
Pharmaceutical drugs have an inelastic demand, and computers have an elastic demand. Suppose that technological advance doubles the supply of both products (that is, the quantity supplied at each price is twice what it was). a. What happens to the equilibrium price and ...
November 22, 2010

Microeconomics
Pharmaceutical drugs have an inelastic demand, and computers have an elastic demand. Suppose that technological advance doubles the supply of both products (that is, the quantity supplied at each price is twice what it was).
November 22, 2010

Algebra
A gardener has 60 feet of fencing with which to enclose a garden adjacent to a long existing wall. The gardener will use the wall for one side and the available fencing for the remaining three sides. (a) If the sides perpendicular to the wall have length x feet, which of the ...
November 21, 2010

Algebra
If the sides perpendicular to the wall have length x feet, which of the following (A, B, C, or D) represents the area A of the garden? A(x) = –2x2 + 30x A(x) = –2x2 + 60x A(x) = x2 – 60x A(x) = 2x2 – 60x
November 21, 2010

physics
a small child is sliding down a 25 degree slide at a uniform velocity of 1.0 m/s. If the child weighs 210 N, find the coefficient of friction between the slide and the child.
November 18, 2010

Trig
What expression represents the same value as sin 19(degrees)?
November 11, 2010

Chemistry
When heated, N2O4 dissociates as follows: N2O4 =2NO2 A flask initially contians .560 M N2O4. at this temperature, Kc is 4.00. what is the equilibrium concentration of NO2?
November 4, 2010

physics
A 0.69 kg mass is observed to accelerate at 8.16 m/s2 in a direction 30.5° north of east. There is a force directed north acting on the object and a force directed east acting on the object. What is the magnitude of the force acting east on the object?
November 3, 2010

physics
A 0.69 kg mass is observed to accelerate at 8.16 m/s2 in a direction 30.5° north of east. There is a force directed north acting on the object and a force directed east acting on the object. What is the magnitude of the force acting east on the object?
November 3, 2010

physics
A 0.69 kg mass is observed to accelerate at 8.16 m/s2 in a direction 30.5° north of east. There is a force directed north acting on the object and a force directed east acting on the object. What is the magnitude of the force acting east on the object?
November 3, 2010

physicssss
A 0.69 kg mass is observed to accelerate at 8.16 m/s2 in a direction 30.5° north of east. There is a force directed north acting on the object and a force directed east acting on the object. What is the magnitude of the force acting east on the object?
November 3, 2010

PHYSICAL SCIENCE
KE=1/2mXv KE=1/2(5kgX10m/s^2) KE=1/2(5kgX100m/s^2) KE=1/2(500kgXm/s^2) KE=250kgXm/s^2=250J
November 2, 2010

Math
Latoya has 3/4 of a bag of popcorn. If she eats half of the popcorn at a movie, ho much does she have left?
November 1, 2010

Math
If Rupert flew 3/16 of the way around the world but George only flew 4/9 as far as Rupert, how far around the world did George fly?
November 1, 2010

physics
A heavy freight train has a mass of 11800 metric tons. If the locomotive can pull with a force of 691000 N, how long does it take to increase it's speed from 0 to 70.3 km/h?
October 31, 2010

physics
A heavy freight train has a mass of 11800 metric tons. If the locomotive can pull with a force of 691000 N, how long does it take to increase it's speed from 0 to 70.3 km/h?
October 31, 2010

Physics
A heavy freight train has a mass of 11800 metric tons. If the locomotive can pull with a force of 691000 N, how long does it take to increase it's speed from 0 to 70.3 km/h?
October 31, 2010

corporate finance
Bank One is offering a 30yr mortgage with an EAR of 5 3/8%. You plan to borrow $150,000, what will your monthly payments be
October 20, 2010

corporate finance
If the rate of inflation is 5%, what nominal interest rate is necessary for you to earn a 3% real interest rate on your investment?
October 19, 2010

physics
A small rubber wheel is used to drive a large pottery wheel, and they are mounted so that their circular edges touch. The small wheel has a radius of 1.7 cm and accelerates at the rate of 6.9 rad/s^2, and it is in contact with the pottery wheel (radius 27.0 cm) without ...
October 18, 2010

gen chem
what is the concentration of an aqueous solution when you add 9.58x10^-4 moles of copper nitrate to 42ml of water
October 17, 2010

Business
Communist Prison Camp In such prisons the total regimen, consisting of physical privation, prolonged interrogation total isolation from former relationships and sources of information, detailed regimentation of all daily activities, and deliberate humiliation and degradation, ...
October 15, 2010

grammar
in the sentence "He felt hungry and thought about the lunch wrapped in his handkerchief." which are the linking verbs and which are the action verbs?
October 12, 2010

algebra
the acme widget company has $13,000 available for making widgets. part of the money is spent on an advanced widget-bending machine costing $1,000. the manufacturing cost for each widget is $3. how many widgets can be made with the money available?
October 9, 2010

physics
how long would it take for the car to go from 0 to 4mi/h
October 1, 2010

applied maths
a force 'P' acts on a bodyat an angle theta to a horizontal line 'OX'. P,together with a pull of 1.5kn at 30degrees to, and below 'OX', has the same effect as a force of 5kn at 45degrees to and above 'OX'. i'm so confused!
September 19, 2010

english
. In the following sentence, the comma is used correctly with an introductory clause: “Training for the upcoming ten-mile marathon, Lizette includes more protein and complex carbohydrates in her diet.” True False
September 19, 2010

geometry
Given Circle D, if AC = 16 units, then what is the length of CB? A circle is drawn with center D. Two radii are drawn, AD and DC. Segment AC is drawn with a perpendicular, DB.
August 31, 2010

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