Thursday
September 18, 2014

Posts by sam


Total # Posts: 3,987

physics
A block weighing 71.5 N rests on a plane inclined at 24.1° to the horizontal. The coefficient of the static and kinetic frictions are 0.26 and 0.13 respectively. What is the minimum magnitude of the force F, parallel to the plane, that will prevent the block from slipping?
February 21, 2014

chemistry
How much heat is released when 28.95g of water is frozen?
February 21, 2014

math
A colony of bacteria is growing in a petri dish which has a maximum capacity of 100mg. The mass of bacteria is increasing at a rate given by the logistic equation. Initially there is 2mg of bacteria and the rate of increase is 1mg per day.
February 21, 2014

Math
Mandy scores b points in a basketball game. Jay scores 3 points less than Mandy. Kareem scores 2 times as many points as Mandy. Find the number of points that Jay scores in terms of b.
February 20, 2014

Chemistry
how do i figure out the valences for elements in the transition elements section in the periodic table of elements (i need it for doing nomenclature) and how do i figure out the valences if i don't have the periodic table of elements examples: Zn Cu Ni Co Fe Mn Cr V Ti Sc
February 20, 2014

statistics
Suppose that each unit of a system is up with probability 2/3 and down with probability 1/3. Different units are independent. For each one of the systems shown below, calculate the probability that the whole system is up (that is, that there exists a path from the left end to ...
February 17, 2014

Math
Perimeter of rectangle = 2*l+b. Area = l*b. If l = 1m, b = 55cm. Find area and perimeter
February 17, 2014

Chemistry check and help
so for all the chemical formulas if there is no subscript (for the valency of the element) does it mean it is a one or do i have to find the valency on the periodic table of elements? ex. P02 the P for Phosphorus doesn't have a number does it mean it is a one then ex.SO3 ...
February 16, 2014

Chemistry
so for all the chemical formulas if there is no subscript (for the valency of the element) does it mean it is a one or do i have to find the valency on the periodic table of elements? ex. P02 the P for Phosphorus doesn't have a number does it mean it is a one then ex.SO3 ...
February 16, 2014

Chemistry
i need to write to chemical formula for sulphur(II)iodide but both are non metals what do i do and i get confused sometimes cause i don't know when the metal/non metal gets a one charge (for the valences) ex. NiO =Ni1O2 =Ni2O =Nickel(I)Oxide ex. NiF2 =Ni1F2 =Ni2F =Nickel(...
February 16, 2014

math
Thank you for working with me on math problems
February 16, 2014

math
So would it be 100 x 8 / 16 =50 lbs ?
February 16, 2014

math
How many pounds of nails will be needed to fill 100 boxes with 8oz. of nails in each?
February 16, 2014

Chemistry
I am supposed to name this using IUPAC method for binary compounds (i think) arsenic(111) sulfide silicon tetraiodide antimony (111)bromide ammonia gas lead(11) and the things in the brackets are supposed to be the roman numerals
February 13, 2014

physics
After falling from rest at a height of 31.5 m, a 0.564 kg ball rebounds upward, reaching a height of 20.2 m. If the contact between ball and ground lasted 1.80 ms, what average force was exerted on the ball?
February 12, 2014

physics
The initial velocity of a 1.55 kg block sliding down a frictionless inclined plane is found to be 1.27 m/s. Then 1.07 s later, it has a velocity of 5.37 m/s. What is the angle of the plane with respect to the horizontal?
February 12, 2014

Random
Why is society unfair?
February 11, 2014

math-fractions
Thank you
February 11, 2014

math-fractions
I have to tell the answer in terms of fractions. My doubt is whether it is 9/12 + 6/12 = 15/12 or 15/24 ?
February 11, 2014

math-fractions
Each band member had 12 tickets to sell, Jamie sold 9 of his tickets Matt sold 6 of his tickets. Using fractions find the total number of tickets sold by Jamie & Matt
February 11, 2014

Social Studies
10. Which of the following was Daniel Webster speaking of when he declared, "Liberty and Union, now and forever, on and inseparable!"? A) regional differences*** B) international differences C) improved transportation D) improved industry Is my answer correct?
February 8, 2014

Science
yeah
February 8, 2014

Social Studies
THANK YOU SO MUCH! THIS HELPS!
February 8, 2014

Social Studies
What did the Monroe Doctrine hope to accomplish?
February 8, 2014

Social Studies
Oh.. umm thanks
February 7, 2014

Social Studies
Is my answer correct?
February 7, 2014

Social Studies
During the early 1800s, the United States tried to make peace with other countries in order to grow and develop. Give an example of one of these peace efforts and briefly explain what it hoped to accomplish. An example of one of the peace efforts was the Missouri Compromise. ...
February 7, 2014

Writing
Thanks! :)
February 4, 2014

Writing
Which sentence is punctuated correctly? (To see that it's italicized, I quoted it in *) A. The article called "A Persistent Rebel" in *American History* magazine told about Elizabeth Blackwell. B. The article called *A Persistent Rebel* in *American History* ...
February 4, 2014

Science
Which Of the following differs when comparing the deep ocean to the intertidal zone?? A) Need for Energy B) Salinity C) The amount of sunlight* D) Reliance on phytoplankton
February 3, 2014

EARTH SCIENCE
When the water level of a stream or river exceeds its natural banks, it has reached its
February 3, 2014

URGENT PHYSICS
A hammer thrower accelerates the hammer (mass = 7.30 kg) from rest within four full turns (revolutions) and releases it at a speed of 21.0 m/s. Assuming a uniform rate of increase in angular velocity and a radius of 0.80 m, calculate the angle of this force with respect to the...
February 2, 2014

Politics
Considers the senate opinion
February 2, 2014

English
Thanks a bunch!! :D
February 1, 2014

English
Which of the sentences below is punctuated correctly? A. "You know," Steven said, "I've never been to the zoo." B. . "You know" Steven said, "I've never been to the zoo." C. "You know," Stephen said, "I've ...
February 1, 2014

math
The blue line of best fit for boys intersects the vertical axis at 20 inches and the point (12.5, 25). Which equation best describes the boy's line of best fit?
February 1, 2014

physics
A)Eddie the Eagle, British Olympic ski jumper, is attempting his most mediocre jump yet. After leaving the end of the ski ramp, he lands downhill at a point that is displaced 53.0 m horizontally from the edge of the ramp. His velocity just before landing is 26.0 m/s and points...
January 31, 2014

algebra
Determine the equation of g (x) that results from translating the function f(x)=x^2+5 upward 13 units.
January 31, 2014

Math
Two minor league basebal players got a total of 396 hits. Washington has 8 more hits than sanchez. Find the number of hits for each player. Please help!
January 30, 2014

Math
Mr Townes created a 2foot wide garden path around a circular garden. The radius of the garden is 7 feet. He wants to cover the path in stones. If mr. Townes needs 1 bag of stones for every 5 square feet of path, how many bags of stones will he need to cover his garden path?
January 29, 2014

history help plzzzzzz
Yes its from Flvs 8th Grade U.S. History
January 29, 2014

Algebra
A rectangular dog pen has a perimeter of 10 yd and a width of 2yd. What is its area?
January 29, 2014

college physics
To tighten a bolt, you push with a force of 76N at the end of a wrench handle that is 0.26m from the axis of the bolt. What torque are you exerting?
January 28, 2014

math
A ladder is 2 m long. It leans against a wall so that it is 90 cm from the base of the wall. How far up the wall does the ladder reach? Put your answer in m. Round to 3 sig fig.
January 28, 2014

Chemistry
How did you get -.52?
January 28, 2014

Chemistry
Colligative Properties The freezing point of distilled water was determined by recording a thermogram: -0.176 degrees Celsius. The freezing point of a 0.200 m (molality) solution containing an unknown, ionic compound was determined by recording a second thermogram: -.904 ...
January 28, 2014

chemistry
calculate the percentages by mass of the component element in sodium trioxonitrate(v)
January 28, 2014

Chemistry
The freezing point of a .200m solution: -.904 degrees Celsius.
January 28, 2014

Chemistry
Colligative Properties The freezing point of distilled water was determined by recording a thermogram: -0.176. The freezing point of a 0.200 m (molality) solution containing an unknown, ionic compound was determined by recording a second thermogram. a. Determine the freezing ...
January 28, 2014

Physics
A baggage carousel at an airport is rotating with an angular speed of 0.397 rad/s when the baggage begins to be loaded onto it. The moment of inertia of the carousel is 2440 kg·m2. Ten pieces of baggage with an average mass of 16.5 kg each are dropped vertically onto ...
January 27, 2014

Physics
A stationary bicycle is raised off the ground, and its front wheel (m = 1.70 kg) is rotating at an angular velocity of 21.9 rad/s (see the figure). The front brake is then applied for 1.35 s, and the wheel slows down to 4.47 rad/s. Assume that all the mass of the wheel is ...
January 27, 2014

algebra
thanks steve
January 26, 2014

algebra
suppose a ball is thrown upward from a height of 4.5 feet with an initial velocity of 21 feet per second. write an equation relating the time t and height h of the ball
January 26, 2014

English
the answer is b
January 26, 2014

English
no b
January 26, 2014

Steve
How do I find the vertex?
January 25, 2014

Damon
Sorry you were right my unit was wrong, thanks!
January 25, 2014

steve
As my final answer do I use ft or m ?
January 25, 2014

Damon
yes
January 25, 2014

Damon
Okay this time my answer came to be 39.4 m but it still says incorrect. Did I not do my calculations correctly?
January 25, 2014

Damon
When I did that My answer came to be .501 but it was marked wrong. Was that the answer I was supposed to get?
January 25, 2014

physics
A lighthouse that rises h1 = 47.0 ft above the surface of the water sits on a rocky cliff that extends d = 17.4 ft from its base, as shown in the figure below. A sailor on the deck of a ship sights the top of the lighthouse at an angle of theta = 29.3 degree above the ...
January 25, 2014

Damon
I know but which values do I plug in?
January 25, 2014

Damon
For part E which x and y do I plug in?
January 25, 2014

physics
Data: theta_1 = 44.9 theta_2 = 146.1 A = 4.8 cm B = 8.7 cm A)What is the x component of vector A? B)What is the y component of vector A? C)What is the x component of vector B? D)What is the y component of vector B? E)What is the magnitude of vector (A + B)?
January 25, 2014

Damon
yes in terms of vf. we are asked to combine different kinematic equations to drive xf. I believe the equation v=vo+at^2 can sub for vo. does this make sense?
January 25, 2014

Physics
A hot-air balloon is rising upward with a constant speed of 2.20 m/s. When the balloon is 2.50 m above the ground, the balloonist accidentally drops a compass over the side of the balloon. How much time elapses before the compass hits the ground?
January 24, 2014

math
16 times 4 which equals 64 so the length of the rope was 64 inches
January 23, 2014

math
1/3 is the probability that Tom will score 24 or more times in tonight's game.
January 23, 2014

math
I do not understand what the question is.
January 23, 2014

maths
No it is actually 2 hundredths or 2/100. Hope this helps!
January 23, 2014

physics
A model rocket is launched straight upward with an initial speed of 47.7 m/s. It accelerates with a constant upward acceleration of 2.02 m/s2 until its engines stop at an altitude of 157 m. What is the maximum height reached by the rocket?
January 23, 2014

math
24 of each or 4 chicken paddies packs and 3 bun packs
January 23, 2014

Math
The answer is $510
January 23, 2014

Social Studies
I'm not so sure about the answers to these questions. Could you check my answers please? Thanks. Who led the federal troops that forced the Cherokee west on the trail of tears? -Andrew Jackson -Winfield Scott -William Henry Harrison** -Oliver Hazard Perry To win the ...
January 19, 2014

Math
What is the value of the following expression? - 3| -3 + 6| - 3
January 15, 2014

math
Eduardo thinks of a number between 1 and 20 that has exactly 5 factors . what number is he thinking of ? explain
January 13, 2014

Physics
how much energy is required to change 40 g of ice at -10 C to steam at 110 C?
January 12, 2014

Physics
a ball is given a velocity of 3.89 m/s at an angle of 32 degrees. Calculate the maximum height and the range of the ball after 5.0s.
January 12, 2014

Physics
A car traveling with an initial velocity of 68 km/h accelerates uniformly at a rate of 1.35 m/s^2 for 4.7s. Find the final speed and displacement of the car during the specified time interval.
January 12, 2014

Physics
A bus slows down uniformly from 75 km/h to 15 km/h in 12.55 s. How far did the car travel before stopping?
January 12, 2014

Physics
Henry walks 20 km west forgot his coat, so he turns and heads 13 km east. He decided to go another path to make up for the lost time and travels 30 km south and then moves west for 27 km. Calculate Henry's displacement.
January 12, 2014

physics
A child and a sled have a combined mass of 87.5 kg slides down a friction-less hill that is 7.34 m high. If the sled starts from rest, what is the velocity of the sled at the bottom of the hill?
January 12, 2014

math
Use synthetic division to find the quotient and remainder. (r^2-2r+2), (r-1)
January 11, 2014

Science Please HELP!!!
Which of the following are structures that rely on capillaries for exchange or movement of small molecules? 1 teeth, aorta, ureter 2 cartilage, epidermis, larynx 3 nephron, villi, alveoli 4 leukocytes, atrium, bronchi answer #2
January 8, 2014

8th Grade Connections Academy
What connection academy at ripon?
January 8, 2014

Science Please HELP!!!
Ms.Sue?
January 8, 2014

Science Please HELP!!!
1 teeth, aorta, ureter 2 cartilage, epidermis, larynx 3 nephron, villi, alveoli 4 leukocytes, atrium, bronchi answer #2
January 8, 2014

Science Please HELP!!!
Please anyone!!!
January 8, 2014

Science Please HELP!!!
Which of the following are structures that rely on capillaries for exchange or movement of small molecules?
January 8, 2014

Physics
A car of mass 900.0 kg accelerates away from an intersection on a horizontal road. When the car speed is 49.7 km/hr (13.8 m/s), the net power which the engine supplies is 4300.0 W (in addition to the extra power required to make up for air resistance and friction). Calculate ...
January 2, 2014

math
thank you starting to get it little by little
December 18, 2013

math
how would you do the following 12 divided by 2 7/8, 1 1/6 x 3 3/8 ,
December 18, 2013

math
How do you do the following 1 5/8 +2 7/24 and 1 3/8 divided by 2/4. NOT SURE OF THE FORMULA
December 17, 2013

math
Thank you. I thought so too
December 16, 2013

math
At the Pentagon there are921 feet along each outer side facade and 17.5 miles of corridorS inside it. All sides of the Pentagon are equal. What is the perimeter of the Pentagon
December 16, 2013

math
Is it 7.98 x2 x4.2 /1/2 =16.75?
December 15, 2013

math
The area of a triangle is 3.99cm2 . If the base is 4.2 cm, how do you find the height ?
December 15, 2013

science very urgent help?
Susan has heard that taking an over-the-counter ‘energy’ pill, which contains as much caffeine as a strong cup of coffee, makes people feel alert and ‘speedy’. She wonders if taking this pill will make a difference to the reaction times of people doing an ...
December 13, 2013

math
Tom has 58 cards
December 12, 2013

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