Tuesday
September 1, 2015

Posts by H


Total # Posts: 159

AP Physics
A bridge 30 m long crosses a chasm. If the bridge is inclined at angle of 20 degrees to the horizontal, what is the difference in height of the two ends of the bridge?
August 30, 2015

Chemistry
How much heat would be absorbed by 55 grams of copper when heated from 24 degrees Celsius to 40 degrees Celsius? The specific heat of copper is .385 My answer is 338.8 Joules. Is this correct?
June 10, 2015

PHYSICS
WHAT IS CENTER OF MASS?
May 1, 2015

algebra
h
March 24, 2015

english
Water puts out a fire. Cold words calms down an angry person. What are some examples of cold words?
March 2, 2015

english
What does this quote mean: “Fire hath its force abated by water, not by wind, and anger must be allayed by cold words and not by blustering threats.” Please help. I have no idea.
March 2, 2015

bible
Our God is amazing. List five descriptive words that you would use to describe the mind of our God. Think of creation and what the Lord did.
December 30, 2014

physics
jyhdjdjtdj
December 14, 2014

statistics
suppose that the teacher of this class graded solely on a curve - 10% get A, etc. How might this effect students getting into into study groups to prepare homework or tests?
October 11, 2014

geometric sequence
what are you dividing??
September 27, 2014

geometric sequence
The sum of the 2nd and 5th terms of a geometric sequence is 3.5. The sum of the 3rd and 6th is -7. Determine the ratio r of the sequence and the first term a.
September 27, 2014

chemistry
If 70.0 mL of water is added to 30.0 mL of 0.400 M solution of NaOH, what is the new concentration of NaOH?
September 27, 2014

History on Middle Ages(PLEASE HELP NOW)
C!! just took the quiz and got all of it right!
September 24, 2014

Physics
An 80.0 kg rollerblader is at rest at the top of a 100 m hill at a 7o incline. The coefficient of friction on the hill is 0.110. What is the roller blader's kinetic energy at the bottom of the hill?
September 22, 2014

maths
Two sides
July 30, 2014

chemistry
The density of 19.0% by mass of nitric acid, HNO3 is 1.11 g cm-3. Calculate the volume (dm3) of acid needed to prepare 2.00 dm3 of 3.00 mol dm-3 HNO3 solution. (FW HNO3 = 63 g/mol)
March 28, 2014

english
What is the tone in "a thankless experience
March 26, 2014

Physics
kj
February 25, 2014

Science
Thank you! Hope these are correct
January 15, 2014

math
dunno
December 8, 2013

math
2,3,5,7,8,6
December 2, 2013

calculus
A closed cardboard box is made with a square top and bottom, and a square horizontal shelf inside that divides the interior in half. A total of 12 square meters of cardboard is used to make the top, sides, bottom, and shelf of the box. What should the dimensions of the box be ...
November 15, 2013

calculus
A dog kennel with four pens is to be constructed. The pens will be surrounded by rectangular fence that costs $23 per meter. The rectangle is partioned into four pens of equal size with three partitions made of fence that costs $12 per meter. Each pen measures x meters wide by...
November 15, 2013

Math
0 is the intercept because the line passes through the axis at X=0 or y=0
November 11, 2013

Calculus
27 ft of wire is to be used to form an isosceles right triangle and a circle. Determine how much of the wire should be used for the circle if the total area enclosed is to be a maximum? I can only find the minimum because the parabola is opening upward
November 11, 2013

Chemistry
Electron exhibiting a particle wavelength of 7.18 x 10-9 are emitted from hydrogen atoms after interaction with high energy photons. Assuming that the electrons in the hydrogen atom were in their ground state prior to interaction, determine the wavelength of the photon which ...
October 12, 2013

microeconomics
Question 20 of 20 5.0 Points If the government attempts to control pollution with a command-and-control policy: A. the government will control the firm's entire production process. B. the government will force the firm to use particular pollution-control technologies. C. ...
September 17, 2013

physics
a large bus and a van, both moving with a velocity of magnitude v, have a head-on-collision and both the vehicles stop after the collision. if the time of the collision is 1 sec then, a) which vehicle experiences smaller force of impact? b) which vehicle experiences the ...
June 7, 2013

Physics
Suppose that we repeat the experiment shown in the video, but we replace one of the cylinders with a cylinder that has twice the radius (and use larger containers of water). If the height of the original cylinder is \rm h, how deeply must we submerge the new cylinder to get ...
April 23, 2013

chemistry
sadf
March 25, 2013

math
huj
February 21, 2013

health
55
February 13, 2013

physics
3.5x10^9
November 13, 2012

physics
A key falls from a bridge that is 45 m above the water. The key falls straight down and lands in a model boat traveling at a constant velocity of 3.5 m/s. Calculate the distance the boat was from the point of impact when the key was released. Answer d= 10.6 m
November 11, 2012

physics
A ball is dropped from the top of a building. The balls fall 3 times farther during its last second of freefall than it did during its third second of freefall. The ball fell 4.9 meters during its first second, how tall is the building and how much time is the ball in the air...
November 11, 2012

math algebra
.075*10000 = .08x + .06(10000-x) x = 7500 ------ .075*10000 = .08*7500 + .06(10000-7500) .075*10000 = 600 + .06(2500) .075*10000 = 600 + 150 .075*10000 = 750 750$
November 7, 2012

geometry
A swimming pool is 3 ft deep in the shallow end the bottom of the pool has a steady downward drop of 12 degrees if the pool is 50 feet long how deep is the deepest end?
October 22, 2012

Physics
.05
October 9, 2012

Calc
thanks for the first part. i wanted something that was more step-by-step for the second one.
October 1, 2012

Calc
Evaluate the integral using any method: (Integral)sec^3x/tanx dx I started it out and got secx(1tan^2x)/tanx. I know I just have to continue simplifying and finding the integral, but I'm stuck on the next couple of steps. Also, I have another question witht he same ...
October 1, 2012

Chemistry
just get the molar mass and use multiplication by one, meaning it would be mol/1 x grams(from molar mass)/moles(1)of the compound.
October 1, 2012

physics
ya
September 25, 2012

Chemistry
What mass of Ca(OH) 2 is required to make 1.5 l of a 4.0% (w/v) solution of Ca(OH)2 in water?
September 18, 2012

Calculus
Find the volume of the solid generated by revolving the region bounded by the line y=5x+6 and the parabola y=x^2 about the following lines: a) the line x=6 b) the line x=-1 c)the x axis d) the line y=36 Thanks!
September 16, 2012

Chemistry
A 50.0 mL graduated cylinder has a mass of 67.6 g. When it is filled with an unknown liquid to the 38.8 mL mark, the cylinder and liquid combined have a mass of 119.4 g. Calculate the density of the liquid in g/cm3. (1 mL = 1 cm3.)
September 12, 2012

Chemistry
the steps are right but its not al its zn.
June 3, 2012

calculus
Integral from pi/6 to pi/4 of 2sin(2x)cos(2x)dx=
March 8, 2012

physics
A wire 453 m long is in a 0.2 T magnetic field. A 2.56 N force acts on the wire. What current is in the wire? Answer in units of mA
March 4, 2012

algebra
solve by using the square root method: (5y+4)^2+100=0
March 4, 2012

6th grade math
23. 5.87 25. 9.035 27. 8.669 29. .143
January 4, 2012

calculus
The value of c for which f(x) = x + c/x has a local minimum at x= 3 is (a) -9 (b) - 6 (c) -3 (d) 6 (e) 9
December 25, 2011

English
22 is B. do you know 7) I wonder if my daydream of my neighbor's house being raided has worked its way across the street. ?
December 3, 2011

English
16 is the american. do you know what 11)I didn't care much for the poems she wrote. ?
December 3, 2011

6th grade math
2:1 or 2/1
November 29, 2011

Chemistry
.092
October 31, 2011

chemistry
what is the volume in liters of 3.0 moles CH4, at 26C and 1.48atm?
October 26, 2011

statistics
test
October 21, 2011

physics
hg
October 6, 2011

chemistry
nope
October 3, 2011

physics
a cat walking at 0.25 m/s sees a mouse and accelerates uniformly at 0.40 m/s (squared) for 3.0 s. what is the cat's displacement during this time?
September 25, 2011

English Check
hi
September 14, 2011

Physics
A car starting from rest, accelerates at 5.0 m/s^2 fpr an unknown time interval. If the car travels 250 m in the acceleration period, what is the time interval?
June 14, 2011

physics
An object accelerates from 5.0 m/s to 100m/s. If the object traveled 250 m during this time, what was the acceleration?
June 14, 2011

Science
Equal Masses of phosphorus and chlorine react according to the follow equation. 2P+3Cl2=2PCl3 Which reagent is in excess and what percentage of it will remain at the end of the reaction
May 9, 2011

principle of managemen
jkyfgttctt
April 23, 2011

physics
Set the centripetal acceleration V^2/R at the top equal to g. That will assure tht the car does not leave the track.
February 22, 2011

physics 1
197.568
February 1, 2011

engineering
isnt the area of a circle Pi*R^2?
January 13, 2011

half life
look at the intro to nuclear physics (2500U) tutorial notes (tut 6 i think)
January 13, 2011

math
1+4+s=
January 12, 2011

math
1+4+s=
January 12, 2011

Pre -calculus
An observer 2 km from the launching pad observes a vertically ascending missile at an angle of elevation of 21 degrees. 5 seconds later the nagle has increased to 35 degrees. What was its average speed during this interval? If it keeps going vertically at the same average ...
December 5, 2010

physics
-272.97
November 13, 2010

physics
3.3E25
October 26, 2010

Math 12
trig question 2sin^2x+sinx-6=0 how to solve for x when the restriction is x is greater than or equal to zero but less than 2pi
October 21, 2010

CHEMISTRY (WEBWORK)
how about parts a and b?
July 19, 2010

CHEMISTRY (WEBWORK)
problem 7 part A: iii, iv. part b: i. didn't get problem 8 yet.
July 19, 2010

CHEMISTRY (WEBWORK)
i got it right.
July 19, 2010

CHEMISTRY (WEBWORK)
number 9 part A is : v, vi
July 19, 2010

College Physics
A 8.2 gram lead bullet that was stopped in a doorframe apparently melted completely on impact. Assuming the bullet was fired at room temp., what is the minimum muzzle velocity of the gun?
May 6, 2010

Horizon
What would the final volume of water be if 80.0 kJ were added to a 100.0 mL sample at 100.0 degrees Celsius?
April 29, 2010

Accounting
I know this is late, but its mostly to those that will get this problem at some point. You are right about the journals. To find the Rent expense, you need to add ALL payments (11,000+11,600+12,200+12,800+...+23,000) then divide by 21 (the term of the lease) To find Cash, ...
March 8, 2010

math
A rectangular field 250 m long by 110 m wide. How much shorter is it to walk diagonally across the field than around the sides?
March 1, 2010

calc
A train travels from city A to city B. The cities are 600 miles apart. The distance from city A at t hours after the train leaves A is given by d(t) = 50t + t^2. What is the average velocity of the train in miles per hour during the trip from A to B?
February 6, 2010

math
I am working on a problem where I am to graph the equation and identify the y intercept the equation is y+x=-9 On the graph, I plotted (0,-9) and (-9,0); I identified the y intercept as (0,-9) Is this correct?
January 9, 2010

algebra
My answer to the question below is >=22.5 is it correct 0.6x+4<=1.0x-5
January 9, 2010

Child Psychology
They are authoritarian answer c
January 7, 2010

math
I am lost, and I bet it is simple, but I have been working with many problems and I keep coming back to this and I grow increasingly confused. How do I begin to solve this problem? In 1993 the life expectancy of males in a certain country was 71.7 years. In 1997 it was 75.2 ...
January 7, 2010

Algebra
I am lost, and I bet it is simple, but I have been working with many problems and I keep coming back to this and I grow increasingly confused. How do I begin to solve this problem? In 1993 the life expectancy of males in a certain country was 71.7 years. In 1997 it was 75.2 ...
January 6, 2010

Math
I am lost, and I bet it is simple, but I have been working with many problems and I keep coming back to this and I grow increasingly confused. How do I begin to solve this problem? In 1993 the life expectancy of males in a certain country was 71.7 years. In 1997 it was 75.2 ...
January 6, 2010

MATH/ALGEBRA PLEASE
Okay, I think I have arrived at all the answer to the questions thrown my way. However, how do I explain what is happening “graphically”, where the services are charging same rate? : Your company must use a transportation service to shuttle their corporate partners ...
December 17, 2009

Help;is this correct?
Graphically, where the services are charging the same rate, the graphs will intersect. A solution of a system of equations in two variables is an ordered pair that makes both equations true.
December 17, 2009

Algebra help
Okay, I think I have arrived at all the answer to the questions thrown my way. However, how do I explain what is happening “graphically”, where the services are charging same rate? : Your company must use a transportation service to shuttle their corporate partners ...
December 17, 2009

Algebra
Okay, I think I have arrived at all the answer to the questions thrown my way. However, how do I explain what is happening “graphically”, where the services are charging same rate?
December 17, 2009

Math
Here is the question: The mortgage department of the company is selling two model homes that are located on the same block. The square footage, as well as the type of model, determines the cost of these homes. e) The second home has 1000 square feet less than twice the square ...
December 17, 2009

MATH
Thanks
December 16, 2009

MATH/amendment
I added a few more sentences, does this sound okay, or should I exclude it? The interval notion is a way to express solutions of an inequality. Points a and b are the endpoints of the interval; we can include parentheses and brackets to express the interval notation; (a,b) ...
December 16, 2009

MATH
Give a response of at least 50 words to the following: Describe the graph of the interval [-4, 3). • Explain how this differs from the graph of the interval [-4, 3]. From the question above, does the answer below sound right? The interval notion is a way to express ...
December 16, 2009

algebra
.45n
November 26, 2009

algebra
It would look like this...9(23-4y)+7y=4 Then you simplify 9*23=207 9*-4y=-36y so you now have 207-36y+4y Combine like terms -36y+4y=-32 -32y=4 Finally you divide the end reslut is y=-8
November 26, 2009

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