Tuesday

December 1, 2015
Total # Posts: 357

**Physics**

A mass of 2.2kg is placed on a stiff vertical spring which has a spring constant of 950n/m. The object is then pressed against the spring until it has been compressed a distance of 77cm. The mass is then released and is allowed to be thrown up into the air. How high in the ...
*February 25, 2012*

**Physics**

A spring is mounted horizontally. A crate which has a mass of 8.5kg is pressed against the spring with a force of 350N. As a result the spring is compressed a distance of 82.0cm. The mass is then released and is allowed to slide along the horizontal, frictionless surface. What...
*February 25, 2012*

**Physics**

A box which has a mass of 14kg is sliding along a horizontal surface with a velocity of 18m/s when it encounters a frictionless inclined plane which meets the horizontal at an angle of 28 degrees. The box slides up the incline until it comes to a halt. How far up the incline ...
*February 25, 2012*

**Physics**

A 25kg crate is sitting at the bottom of an inclined plane. The inclined plane 12m long meets the horizontal at an angle of 15 degrees and has a coefficient of friction of 0.55. A force is applied to the crate so as to slide the crate up the incline at a constant speed. What ...
*February 25, 2012*

**College Geology**

assume that a particular radioactive-isotope has a half-life of 100 million years. Also assume that the parent isotope is incorporated into the minerals found in igneous rocks and that the only daughter atoms in the rock formed from the decay of the parent isotope. ...
*February 22, 2012*

**algebra**

2,968
*February 2, 2012*

**math**

6/14 Or 3/7 <--- Simplified
*February 2, 2012*

**Chemistry**

If you are using 5.25% (mass/mass) bleach solution and you determine that the density of the bleach solution is 1.08 g/mL, how many moles of sodium hypochlorite are present in a 4.00 mL sample?
*January 31, 2012*

**Chemistry**

If you are using 5.25% (mass/mass) bleach solution and you determine that the density of the bleach solution is 1.08 g/mL, how many moles of sodium hypochlorite are present in a 4.00 mL sample?
*January 31, 2012*

**APUSH**

The above answer in incorrect. Eventhough there was monopolies which were created by the govt. through loans, as all monopolies are created, thiis time period was an excellent one for the u.s.a Trists developed through innovation using the bessemer proccess and vertical and ...
*January 24, 2012*

**algebra**

find the LCM of 11(z-3)and 33(z-3)
*January 20, 2012*

**Algebra**

find the LCM of y^2+6y+9 and y^2+y-6
*January 20, 2012*

**Essay**

never mind!
*January 3, 2012*

**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*