Thursday
October 2, 2014

Posts by D


Total # Posts: 294

engineering mechanics
the greatest and least resultant of two forces are respectively 17 KN and 5 KN. determine the angle between two force when their resultant is root 144 KN.
September 14, 2014

Math
Choose the best description for the real number 34/5 Irrational, because it is a fraction Irrational, because it is a repeating decimal Rational, because it is a fraction Rational, because it is a terminating decimal
August 28, 2014

Stats
the average placement test score of a sample of 64 students out of 1000 registered at a community college is 70 with a standard deviation of 15. Construct a confidence interval with a 5% chance of error.
April 6, 2014

chemistry
Question Part Points Submissions Used A swimming pool, 20.0 m ✕ 12.5 m, is filled with water to a depth of 3.85 m. If the initial temperature of the water is 18.9°C, how much heat must be added to the water to raise its temperature to 28.7°C? Assume that the ...
March 25, 2014

Geometry
Can you please explain this to me?
March 13, 2014

Geometry
Find the area of the composite figure(right triangle), where the hypotenuse is 13m, base is 12m and the height is not given?
March 13, 2014

Physics
A rifle shoots a 4.1g bullet out of it's barrel. The bullet has a muzzle velocity of 975 m/s just as it leaves the barrel. Assuming a constant horizontal acceleration over a distance of 43.0 cm starting from rest, with no friction between the bullet and the barrel, what ...
February 20, 2014

physics
How do I calculate the radial acceleration in g's? For example: Calculate the radial acceleration (in g’s) of an object on the ground at the earth's equator, turning with the planet. Earth's radius is 6380 km.
February 3, 2014

Physics
A 26.2 g marble sliding to the right at 62.0 cm/s overtakes and collides elastically with a 13.1 g marble moving in the same direction at 15.5 cm/s. After the collision, the 13.1 g marble moves to the right at 77.5 cm/s. Find the velocity of the 26.2 g marble after the ...
January 8, 2014

Math
furry sack of balls
December 6, 2013

Math
30
December 3, 2013

Chemistry
Describe the creation of 234 mL of a 3.2 M sodium chloride solution
December 2, 2013

physics
You walk 51 m to the north, then turn 30° to your right and walk another 45 m. How far are you from where you originally started?
November 14, 2013

physics
I figured it out. 130N. I forgot about gravity.
November 2, 2013

physics
a woman weighs Fg=650 when standing on a stationary scale. The woman is riding an elevator from the 1st floor to the 10th floor. As the elevator approaches the 10th floor, it decreases its upward speed from 9 m/s to 1 m/s in a time interval of 1 second. What is the average ...
November 2, 2013

GEOMETRY
5√3/3 Can somebody evaluate this PLEASE!!!!!!
October 21, 2013

GEOMETRY
simplify 5√3/3
October 21, 2013

GEOMETRY
no i dont have a calculator thats why im asking what it is? can you please give me the answer. this is the last problem 2 my homework and i can't figure it out
October 21, 2013

GEOMETRY
i need it simplified to the nearest 10th
October 21, 2013

GEOMETRY
simplify 5 squareroot(3)/3
October 21, 2013

u.s history
Where did John Wilkes Booth shoot Abraham Lincoln?
October 18, 2013

u.s history
How did the Civil War end?
October 18, 2013

u.s history
How did the Civil War affect women?
October 18, 2013

health
Whats the largest bone in your body?
October 16, 2013

GEOMETRY
44411001444
October 16, 2013

GEOMETRY
parallelogram with a side of 40in a base of 36in and a height of 33in. WHAT IS THE AREA?
October 16, 2013

Math
A couple needs $15,000 as a down payment for a home. If they invest the $10,000 they have at 8% compounded quarterly, how long will it take for the money to grow into $15,000?
October 9, 2013

Calculus
Finf (dy/dx) y=(1+28x^3)f(x)+(6x)g(x)(x^4+5x+7)+(6x)g(x)(x^4+5x+7)-(e^x+7x^4)f(x)+3x^2g(x)(4x^3+5+7)/((x^4+5x+7)^2
October 6, 2013

physics
A test rocket is launched vertically from ground level (y = 0 m), at time t = 0.0 s. The rocket engine provides constant upward acceleration during the burn phase. At the instant of engine burnout, the rocket has risen to 49 m and acquired a velocity of What is the maximum ...
September 26, 2013

troy
A car is parked on a cliff overlooking the ocean on an incline that makes an angle of 15.0° below the horizontal. The negligent driver leaves the car in neutral, and the emergency brakes are defective. The car rolls from rest down the incline with a constant acceleration ...
September 24, 2013

math
The owner of a service station receives a loan of $8,500 at 10.5% for 7 months. Find the amount of simple interest
September 20, 2013

Calc
Sqrt(xyz) I rewrote it has x^(1/2)*y^(1/2)+z^(1/2) And the derivative with respect to x is Sqrtyz/(2sqrtx) is that right
September 20, 2013

math
-x/y^2 = x/(1/y) is that a true statement?
September 19, 2013

choice
Varsity Press, a publisher of college textbooks, received a $70,000 promissory note at 12% ordinary interest for 60 days from one of its customers, Reader’s Choice Bookstores. After 20 days, Varsity Press discounted the note at the Grove Isle Bank at a discount rate of ...
September 16, 2013

math
From 70 feet away from the base of a tree on level ground, the angle to the top of a tree is 60⁰. What is the height of the tree? What is the approximate distance from the vantage point to the top of the tree, to one decimal point? (Assume that the tree is perpendicular ...
June 12, 2013

Algebra
9 more than 2 times x
June 9, 2013

physics
if the * is the degrees, then you need to draw the vectors according to their direction. you can use a graph paper and make your own scale: say one unit cube is 10km/hr. then use the protractor to draw the vectors taking an horizontal line as zero degrees. then draw the ...
June 6, 2013

Science
which of the following is an example of a mineral? silver, lava, fossils, sand, I say Lava
May 15, 2013

statistics
9,873.35
April 23, 2013

stats
suppose that a population of people is 1200. .25 of the population is white. we take a random sample of 100 people. What is the probabilit that more than .29 of these people are white?
April 16, 2013

U.S/history AP
King Cotton works for me
April 13, 2013

chemistry
A metal block of mass 11.5 g gives off 360 J of heat while cooling from 99.7 to 32.5 oC. What is the specific heat of the metal in J g-1 oC-1?
March 26, 2013

chemistry
A metal block of mass 11.5 g gives off 360 J of heat while cooling from 99.7 to 32.5 oC. What is the specific heat of the metal in J g-1 oC-1?
March 26, 2013

Science
Name 3 ways screws are used?
March 21, 2013

math
which fraction cannot be expressed as repeat decimal? a) 1/11 b)1/4 c 5/8 d 2/3
March 21, 2013

math
solve the equation: 3x-8=12
March 21, 2013

German
there is none. im trying to determine if that sentence is grammatically correct or incorrect.
March 1, 2013

German
Ich schminke mich lieber als er sich. is this incorrect or correct?
March 1, 2013

Cosmology
Comparison of emissions from elliptical galaxies in x-ray and optical bands
March 1, 2013

chemistry
Iwish to prepare 3% NH3 from 20ml strong NH4OH and 180ml H2O.Can you help me?
February 7, 2013

Chemistry
tyr-trp-phe-val-lie
January 27, 2013

Binomial Math
.2150
January 27, 2013

Math
Need help with 4th grade fractions.
January 24, 2013

Math
Jeramie has a jar of nickels and dimes. There are 200 coins worth $14.00. How many of each type of coin are in the jar. :)
January 23, 2013

economics
Mary earns $100/day at a flower shop. She will take 2 days off without pay to attend an out of town wedding. Transportation will cost $180 round trip. Hotel $99/day for 2 nights. What is the opprotunity cost?
January 13, 2013

geometry
angle xoz (5m-5) angle yoz (7m+29) these are supplementary angles. How do you solve?
January 4, 2013

Chemistry
What preperation produces a 2.0 Mole solution of C6H12O6? a) 90.0 grams of C6H12O6 dissolved in 500.0 mL of solution b) 180.0 grams of C6H12O6 dissolved in 1000mL of solution c) 90 Grams of C6H12O6 dissolved in 1000mL of solution D) 180.0 Grams of C6H12O6 dissolved in 500.0mL ...
December 19, 2012

English
yes it is C
December 17, 2012

The Age Of Jefferson To The American Expansion
18 is not D because i got it wrong when i answer the questions
December 7, 2012

Finance
questo
December 2, 2012

CHEMISTRY
What is oxygen extensive properties?
November 30, 2012

chemistry
Rate Constant * Concentration^2
November 29, 2012

Math
12 over 7 simplified
November 29, 2012

Math
-5 over 8 times -3
November 29, 2012

Math
10x and 45x to the power of 4
November 29, 2012

chemistry
Rate Constant * Concentration^2
November 29, 2012

chemistry
Rate Constant * Concentration^2
November 29, 2012

Chemistry
thanks
November 29, 2012

Chemistry
Rate Constant * Concentration^2
November 29, 2012

Chemistry
it is wrong
November 29, 2012

Chemistry
thanks
November 24, 2012

Chemistry
Thanks
November 24, 2012

Chemistry
thanks
November 22, 2012

Chemistry
thanks
November 22, 2012

Chemistry
thanks
November 22, 2012

Chemistry
thanks
November 22, 2012

social studys
fdf
November 20, 2012

Physics
What is the max speed a car can go on a race track with a radius of 80 meters, the coefficient of friction between the tires and the road is .30
November 19, 2012

Physics
A baseball (m = 135 g) approaches a bat horizontally at a speed of 40.4 m/s (90 mi/h) and is hit straight back at a speed of 45.7 m/s (102 mi/h). If the ball is in contact with the bat for a time of 1.00 ms, what is the average force exerted on the ball by the bat? Neglect the...
November 18, 2012

Statisitcs
The mean height of fully grown birch trees are 18 feet with a standard deviation of 1.2 feet, normally distributed. Random samples of size 9 are drawn from this population and the mean of each sample is determined. Find that mean and the standard error of the mean, and the ...
November 14, 2012

Physics
An astronaut in his space suit and with a propulsion unit (empty of its gas propellant) strapped to his back has a mass of 146 kg. The astronaut begins a space walk at rest, with a completely filled propulsion unit. During the space walk, the unit ejects some gas with a ...
November 13, 2012

Physics
The skateboarder in the drawing starts down the left side of the ramp with an initial speed of 5.4 m/s. If nonconservative forces, such as kinetic friction and air resistance, are negligible, what would be the height h of the highest point reached by the skateboarder on the ...
November 12, 2012

physics
A hockey goalie is standing on ice. Another player fires a puck (m = 0.22 kg) at the goalie with a velocity of +63 m/s (a) If the goalie catches the puck with his glove in a time of 7.0 10-3 s, what is the average force (magnitude and direction) exerted on the goalie by the ...
November 12, 2012

Physics
A person pushes a 16.0-kg shopping cart at a constant velocity for a distance of 26.0 m. She pushes in a direction 22.0° below the horizontal. A 38.0-N frictional force opposes the motion of the cart.
November 11, 2012

physics
The National Aeronautics and Space Administration (NASA) studies the physiological effects of large accelerations on astronauts. Some of these studies use a machine known as a centrifuge. This machine consists of a long arm, to one end of which is attached a chamber in which ...
November 7, 2012

Physics
On a banked race track, the smallest circular path on which cars can move has a radius of 115 m, while the largest has a radius 165 m, as the drawing illustrates. The height of the outer wall is 18 m.
November 7, 2012

7th grade science Ms. Sue pleae only 1 question
fdf
November 2, 2012

Physics
The drawing shows a circus clown who weighs 710 N. The coefficient of static friction between the clown's feet and the ground is 0.49. He pulls vertically downward on a rope that passes around three pulleys and is tied around his feet. What is the minimum pulling force ...
October 25, 2012

Physics
Well, hard to imagine the picture, but by the description the wires each side are at 16 deg. back on each side of the tooth, i.e. each at 16 deg. to the face of the tooth. Each has 18N. tension. (sin 16) x 18 = 4.9608N. Double it (2 wires), = 9.9216N. back on the tooth.
October 25, 2012

phyics
A train at a constant 44.0 km/h moves east for 42 min, then in a direction 45.0° east of due north for 17.0 min, and then west for 51.0 min. What are the (a) magnitude (in km/h) and (b) angle (relative to north, with east of north positive and west of north negative) of ...
October 10, 2012

Math
A room has dimensions 2.24 m (height) × 5.30 m × 6.55 m. A fly starting at one corner flies around, ending up at the diagonally opposite corner. (a) What is the magnitude of its displacement? (b) If the fly walks rather than flies, what is the length of the ...
October 9, 2012

math (calculus)
A room has dimensions 2.24 m (height) × 5.30 m × 6.55 m. A fly starting at one corner flies around, ending up at the diagonally opposite corner. (a) What is the magnitude of its displacement? (b) If the fly walks rather than flies, what is the length of the ...
October 9, 2012

Math
(2.0)t^2/2 = (9.5)t t=????
October 9, 2012

Physics
A train at a constant 44.0 km/h moves east for 42 min, then in a direction 45.0° east of due north for 17.0 min, and then west for 51.0 min. What are the (a) magnitude (in km/h) and (b) angle (relative to north, with east of north positive and west of north negative) of ...
October 9, 2012

physic
f(t)=ct
October 4, 2012

physics
A 5.9-kg rock and a 3.0 10-4-kg pebble are held near the surface of the earth. (a) Determine the magnitude of the gravitational force exerted on each by the earth.(b) Calculate the magnitude of the acceleration of each object when released.
October 3, 2012

Algebra,Geometry
You could actually set "X"=0 to find Y, and then plug in a "0" for Y to get X.
September 30, 2012

Math
Thank you!
September 24, 2012

Math
I think. I am honestly not sure what to do.
September 24, 2012

Math
The volleyball court -if it id 80 ft long and 50 ft wide, how would you find the dimensions of the court? Explain please! Remember that I am a 6th grader. Please don't give me a 10-12th grade answer.
September 24, 2012

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