Thursday
October 23, 2014

Posts by Kelsey


Total # Posts: 539

1st grade
3 facts about motion
February 10, 2010

geometry
how do i find the perimeter of a triangle with missing measurements? i have no clue how to do this!
February 7, 2010

precalculus
A man is walking away from a lamppost with a light source h = 6 m above the ground. The man is m = 1.5 m tall. How long is the man's shadow when he is d = 11 m from the lamppost? (Hint: Use similar triangles.)
January 12, 2010

9th grade algebra
what times what is equal to 37
December 9, 2009

spanish 2
cmplete this rule with hay que or se prohibe 1. almorzar en la sala de clase 2 respetar a los demas 3. entregar la tarea a tiempo 4. ir al armario durante las clases 5 contestar las preguntas del profesor
December 3, 2009

GEOMETRY
I think you mean "diagonal," not "diagnol."
November 13, 2009

English
You must have missed my second response. I changed my answer, therefore I assumed you were responding to that.
November 13, 2009

English
That's what I was thinking Thank you
November 13, 2009

English
Can you please explain to me how drinking tea is "effective and relevant" to getting good results? I don't understand.
November 13, 2009

English
paying attention?
November 13, 2009

English
Something that is tangential to getting good results: a. drinking tea b. proper planning c. paying attention d. working hard a. drinking tea?
November 13, 2009

cooking
nothing it just makes the recipe cook longer and soggier
November 13, 2009

chemistry
What is the density (in g/L) of hydrogen gas at 23.0 degrees Celsius and a pressure of 1670 psi?
November 3, 2009

English
My teacher says to take booknotes on To Kill a Mockingbird but I don't know what booknotes are?
October 27, 2009

Proper Grammer
I am just editing my essay for my one class and this is a question I always get stumped on which is the proper way. Would a comma or period go inside the quotation marks, or outside? Example, "The dog ran extremely fast." "The dog ran extremely fast". and I...
October 6, 2009

math
At what rate will $150 double itself in 14 years? Hoe do I solve this?
September 22, 2009

algebra 1A
5 less than 3 plus y and x
September 17, 2009

6th science
scienctist who stidy the natural world say that there is unity in diversity. how does this idea apply to plants?
September 15, 2009

8th grade science
Measurement is a quantity with both a ____________________? Please fill in the blank. This question is on my study guide and I do not know what the answer is?
September 2, 2009

Algebra
Consider the graph of the equation y=ax^2+bx+c, when a does not equal 0. If a is multiplied by 3, what is true of the graph of the resulting parabola? (A) The Vertex is 3 units above the vertex of the original. (B) The new parabola is wider than the original. (C) The new ...
May 14, 2009

5th grade social studies
1 is Christopher Columbus
April 15, 2009

math
What is the probability of selecting a boy and a girl if their are 7 girls and 3 boys.
April 6, 2009

math
how do you find a unit price? is there a formula you need to follow? ex.)how would i find a unit price on an ice cream that if 14 Fl. ounces, has 3 1/2 servings per container and each serving is 1/2 cup. the price of the ice cream is $4.79.
March 11, 2009

physics help please
Consider a system in which 3.60 mol of an ideal monatomic gas is expanded at a constant pressure of 101 kPa from an initial volume of 2.15 L to a final volume of 3.87 L. (b) Find the change in temperature for this process. ? K (c) Determine the amount of heat added to or ...
December 14, 2008

Chem: Mole and Avogadros Number
1.5x10^20
December 11, 2008

physics help 2 please!
The air inside a hot air balloon has an average temperature of 84.3°C. The outside air has a temperature of 15.3°C. What is the ratio of the density of air in the balloon to the density of air in the surrounding atmosphere? inside / outside = ??
December 7, 2008

physics help pleasee!
Three moles of oxygen gas (O2) are placed in a portable container with a volume of 0.0037 m3. The temperature of the gas is 330°C. (a) What is the pressure of the gas? ? Pa (b) What is the average kinetic energy of an oxygen molecule? ? J
December 7, 2008

physics 4**!!
Consider a double-paned window consisting of two panes of glass, each with a thickness of 0.500 cm and an area of 0.880 m2, separated by a layer of air with a thickness of 1.90 cm. The temperature on one side of the window is 0.00°C; the temperature on the other side is 20...
December 4, 2008

physics 3 !!!
Assuming your skin temperature is 37.2°C and the temperature of your surroundings is 20.5°C, determine the length of time required for you to radiate away the energy gained by eating a 265 Calorie ice cream cone. Let the emmissivity of your skin be 0.915 and its area ...
December 4, 2008

physics 2 **
A blacksmith drops a 0.60 kg iron horseshoe into a bucket containing 25 kg of water. (a) If the initial temperature of the horseshoe is 600°C, and the initial temperature of the water is 40°C, what is the equilibrium temperature of the system? Assume no heat is ...
December 4, 2008

physics **
When people sleep, their metabolic rate is about 2.6 10-4 C/(s·kg). How many Calories does a 69 kg person metabolize while sleeping 9.0 hours? ? Cal
December 4, 2008

Physics help 2 please **
A garden hose is attached to a water faucet on one end and a spray nozzle on the other end. The water faucet is turned on, but the nozzle is turned off so that no water flows through the hose. The hose lies horizontally on the ground, and a stream of water sprays vertically ...
November 24, 2008

Physics help please**
A water pipe having a 2.1 cm inside diameter carries water into the basement of a house at a speed of 0.88 m/s and a pressure of 169 kPa. The pipe tapers to 1.0 cm and rises to the second floor 7.1 m above the input point. (a) What is the speed at the second floor? ? m/s (b) ...
November 24, 2008

physics help pleaseee
In the figure below, S is a small loudspeaker driven by an audio oscillator with a frequency that is varied from 1000 Hz to 2000 Hz, and D is a cylindrical pipe with two open ends and a length of 55.0 cm. The speed of sound in the air-filled pipe is 344 m/s. (In the figure s ...
November 16, 2008

physics help 4
An astronaut on a small planet wishes to measure the local value of g by timing pulses traveling down a wire which has a large mass suspended from it. Assume that the wire has a mass of 4.10 g and a length of 1.60 m and that a 3.00 kg mass is suspended from it. A pulse ...
November 9, 2008

Phyiscs help 3
The height of a tower is measured by attaching a simple pendulum to its ceiling, whose length is barely enough to stay off the floor. The pendulum is let go from a small angle, and takes 13 s to return to the same location it started from. a.) How tall is the tower? ? m If the...
November 9, 2008

physics help 2 please!
A 4.0 Hz wave with an amplitude of 12 cm and a wavelength of 30.0 cm travels along a stretched horizontal string. (a) How far does a given peak on the wave travel in a time interval of 6.0 s? ? m (b) How far does a knot on the string travel in the same time interval? ? m once ...
November 9, 2008

Physics help please!
The speed of a deep water wave with a wavelength ë is given approximately by v = (gë/2ð)1/2. Find the speed and frequency of a deep water wave with a wavelength of 5.5 m. ? m/s ? Hz can someone get me started with a formula? I lost my book :(
November 9, 2008

math(Algebra two)
describe what happens to the graph of y=X^2 in the following situations. a. y is replaced with (y+1) b. x is replaced with(x-5) c.x is replaced with (x+3) d.y is replaced with (y-6) i have no clue how to do this can you please help me?
November 4, 2008

physics help 4 please!!
Two turtles (each 2 kg) sit on an approximately massless branch in the water. They sit on opposite sides of the branch's center, each 3 m away. The branch (10 m long) is spinning at 2 rad/s about its center (nearly without friction). Now, if both turtles walk to the ends ...
October 31, 2008

physics help 3!! **
Based on the following data about planet X (which orbits around the Sun): Planet X's distance from Sun = 3.6*1012 m Planet X's radius = 2*106 m Planet X's mass = 8.2*1022 kg a.) Find gx, the size of the acceleration due to gravity on the surface of Planet X. m/s2 b...
October 31, 2008

physics help 2 please!!
Mass A (7 kg) and mass B (10 kg) sit on the ground, 2 m apart. a.) What is size of the the gravitational force: on A from B? N on B from A? N b.) What is the size of the gravitational force: on A from the Earth? N on B from the Earth? N once again, i am using the wrong ...
October 31, 2008

physics help please!!**
A typical GPS (Global Positioning System) satellite orbits at an altitude of 4.0 107 m. (Astronomical data needed for this problem can be found on the inside back cover of the text.) (a) Find the orbital period of such a satellite. hours (b) Find the orbital speed of such a ...
October 30, 2008

geometry
you have to sent up a given and then a prove staement and drwa a diagram
October 26, 2008

geometry
Prove: if th bisector of an angle whose vertex lies on a circle passes through the center of the circle, then it is the prpendiular biector of the se,emt joining the points where the sides of the angle itersect the circle.
October 26, 2008

physics 2, help please
Two masses (mA= 2 kg, mB= 4 kg) are attached to a (massless) meter stick, at the 0 and 75 cm marks, respectively. c.) Now, if mass B was removed, how much force would need to be exerted at the 100 cm mark in order to keep the meter stick level*? ? N d.) Now, if mass B was ...
October 23, 2008

physics
A fish takes the bait and pulls on the line with a force of 2.7 N. The fishing reel, which rotates without friction, is a cylinder of radius 0.048 m and mass 0.76 kg. (a) What is the angular acceleration of the fishing reel? ? rad/s2 (b) How much line does the fish pull from ...
October 23, 2008

physics 2...help please
A wheel on a game show is given an initial angular speed of 1.33 rad/s. It comes to rest after rotating through 3/4 of a turn. (a) Find the average torque exerted on the wheel given that it is a disk of radius 0.76 m and mass 6.4 kg. ? N·m sorry, I'm having ...
October 22, 2008

physics help please
A torque of 1.15 N·m is applied to a bicycle wheel of radius 36 cm and mass 0.83 kg. Treating the wheel as a hoop, find its angular acceleration. ?rad/s2 I know accel is alpha times the radius...where does torque tie in?
October 22, 2008

PHYSICS 3
A solid disk (mass = 1 kg, R=0.5 m) is rolling across a table with a translational speed of 9 m/s. a.) What must the angular speed of the disk be? rad/s d.) The disk then rolls up a hill of height 2 m, where the ground again levels out. Find the translational and rotational ...
October 20, 2008

PHYSICS 2
okay so i have mgh =15.1 and i set it equal to KErot + KE trans? 15.1= 1/2[(2/5 X 2 X .08^2) X (1/2 X 2 X v)^2] that right?
October 20, 2008

PHYSICS 2
A 2.0 kg cylinder (radius = 0.08 m, length = 0.50 m) is released from rest at the top of a ramp and allowed to roll without slipping. The ramp is 0.77 m high and 5.0 m long. (b) What is its rotational kinetic energy? ? J (c) What is its translational kinetic energy? ? J How do...
October 20, 2008

PHYSICS 1
thank you so much! i figured it out!
October 20, 2008

PHYSICS 1
When a pitcher throws a curve ball, the ball is given a fairly rapid spin. A 0.15 kg baseball with a radius of 3.7 cm is thrown with a linear speed of 41 m/s and an angular speed of 37 rad/s. Assume that the ball is a uniform, solid sphere. (b) Calculate how much of its ...
October 20, 2008

physics help 4 please!
For some reason everytime I try to calculate the KE rotational I do not get the right answer. The translational speed can be used for V, right?
October 18, 2008

physics help 4 please!
A solid disk (mass = 1 kg, R=0.5 m) is rolling across a table with a translational speed of 9 m/s. a.) What must the angular speed of the disk be? ? rad/s b.) What is the rotational KE of the disk? ? J c.) What is the total KE of the disk? ? J d.) The disk then rolls up a hill...
October 18, 2008

physics help 3 please!!
A 2.0 kg cylinder (radius = 0.08 m, length = 0.50 m) is released from rest at the top of a ramp and allowed to roll without slipping. The ramp is 0.77 m high and 5.0 m long. (a) When the cylinder reaches the bottom of the ramp, what is its total kinetic energy? (b) What is its...
October 18, 2008

physics help 2!!
thank you very much, I got the translational, but cant get the rotational. What do I use for v?, do I convert the rad/s?
October 18, 2008

physics help 2!!
When a pitcher throws a curve ball, the ball is given a fairly rapid spin. A 0.15 kg baseball with a radius of 3.7 cm is thrown with a linear speed of 41 m/s and an angular speed of 37 rad/s. Assume that the ball is a uniform, solid sphere. Calculate how much of its kinetic ...
October 18, 2008

physics help please 1!!
A 1.27 kg hoop with a radius of 10.0 cm rolls without slipping and has a linear speed of 1.32 m/s. Find the rotational kinetic energy. Find the total kinetic energy of the hoop.
October 18, 2008

PHYSICS
On a horizontal frictionless table, masses A and B (3 kg, 6 kg) slide to the right and left, respectively. They have speeds of 3 m/s and 1 m/s, respectively. The two masses collide, and bounce off each other. After the collision, they travel in opposite directions at speeds of...
October 15, 2008

physics 3!!**
In a football game, a tackle running at a constant speed of 5 m/s tackles a stationary receiver. The two fly off horizontally at 4 m/s, before they hit the ground and begin to slow down. If the mass of the tackle is 120 kg, a.) What is the mass of the receiver? b.) Calculate ...
October 12, 2008

physics 2!!**
Two ice skaters stand at rest in the center of an ice rink. When they push off against one another the 45 kg skater acquires a speed of 0.71 m/s. If the speed of the other skater is 0.84 m/s, what is this skater's mass?
October 12, 2008

physics!!**
In a typical golf swing, the club is in contact with the ball for about 0.0015 s. If the 45 g ball acquires a speed of 75 m/s, estimate the magnitude of the force exerted by the club on the ball.
October 12, 2008

physics 4...help PLEASE!!
A skateboarder starts at point A in Figure 8-27 and rises to a height of h = 2.37 m above the top of the ramp at point B. What was the skateboarder's initial speed at point A?
October 8, 2008

physics3..help PLEASE!!
At the local playground a child on a swing has a speed of 2.14 m/s when the swing is at its lowest point. (a) To what maximum vertical height does the child rise, assuming he sits still and "coasts"? Ignore air resistance. (b) To what maximum vertical height does the...
October 8, 2008

physics 2..help PLEASE!!
A 63 kg skier encounters a dip in the snow's surface that has a circular cross section with a radius of curvature of 12 m. If the skier's speed at point A in Figure 8-25 is 7.9 m/s, what is the normal force exerted by the snow on the skier at point B? Ignore frictional...
October 8, 2008

physics..help PLEASE!
A 0.26 kg rock is thrown vertically upward from the top of a cliff that is 35 m high. When it hits the ground at the base of the cliff the rock has a speed of 28 m/s. (a) Assuming that air resistance can be ignored, find the initial speed of the rock. (b) Find the greatest ...
October 8, 2008

Gil
12-8=4 more black bikes
October 7, 2008

physics 3!! **
A man lifts a 3 kg crate from the floor to a shelf (2 m high) at constant speed*. What was the change in KE of the crate? What is the change in the PE of the crate? If it takes 2 s for the man to lift the crate to the shelf, find the man's power output.
October 6, 2008

physics 2 !!**
A 8 kg crate is placed at rest on an incline plane (s=0.8, k=0.5), whose angle is 60o. It then slides 3 m down the incline. work done by gravity: ?J work done by friction force: ?J Using your results from part a, find the speed of the crate after sliding this distance.
October 6, 2008

physics! **
You raise a bucket of water from the bottom of a deep well. If your power output is 115 W, and the mass of the bucket and the water in it is 3.50 kg, with what speed can you raise the bucket? Ignore the weight of the rope.
October 6, 2008

Math- Conics
What do you do when you have a rotated conic, and you are trying to find the angle and it comes to be tan= undefined. Do I pick 90, or 270?
September 30, 2008

Science/Chemistry
Zn(OH)2 solid (molecular mass = 99.41 amu) is added to 0.500 L of 0.50 M HBr. The resultant solution which is acidic, requires 185 mL of 0.500 M NaOH for neutralization. Calculate the mass (in mg) of Zn(OH)2 that was originally added (problem 53 in Purdue test bank)
September 28, 2008

science/chem
You dissolve 157.1 g of ammonium nitrate in a 250 mL volumetric flask and add water to the mark (call this solution A). You take 30 mL of solution A and place it in a 100 mL volumetric flask and add water to the mark (this is solution B). Next you take 50 mL of solution B and ...
September 28, 2008

Science/Chem
1. You dissolve 157.1 g of ammonium nitrate in a 250 mL volumetric flask and add water to the mark (call this solution A). You take 30 mL of solution A and place it in a 100 mL volumetric flask and add water to the mark (this is solution B). Next you take 50 mL of solution B ...
September 28, 2008

Science/CHEM
Part 1 Chapt 4 1. You dissolve 157.1 g of ammonium nitrate in a 250 mL volumetric flask and add water to the mark (call this solution A). You take 30 mL of solution A and place it in a 100 mL volumetric flask and add water to the mark (this is solution B). Next you take 50 mL ...
September 28, 2008

physics 3
Static and Kinetic Friction: A 10 kg crate is at rest on a horizontal table (s =0.8, k =0.4). Then various amounts of horizontal pushing force are applied to it. a.) The largest pushing force that can be applied before the crate starts moving is of size: N b.)-d.) If the ...
September 23, 2008

physics
A crate of mass m (=40 kg) is placed at rest on a (frictionless) inclined plane, which has an angle (= 30o) above horizontal. a.) The force of gravity on the crate is: b.) The normal force on the crate is: size: N c.) The net force on the crate is: size: N direction: d.) How ...
September 23, 2008

science
a graduated cylinder has a mass of 50.35g when empty. If 20mL of mercury with a density of 13.6g/mL is added to the graduated cylinder, what will be the total mass of the cylinder and mercury?
September 16, 2008

Math
what is the longest multiplication combination for 120
September 3, 2008

english
what part of speech is about? what part of speech is (is)?
September 2, 2008

English
what part of speech is all
September 2, 2008

algebra
How do you solve or what step do you take? do you divide 96 by 6 then you get 16 then what do i do?
August 27, 2008

algebra
Same question as katie, a cubic storage box is made with 96sq ft of wood. What is the length of each edge? if you use V=s3 How do you find s?
August 27, 2008

sience
What is electricity? and how are nuckears involved?
June 28, 2008

English
How do I write a movie title in an essay? I am trying to write about the giant keyboard in the movie BIG. Do I put quotes around the movie title or italicize it? Thank you!
June 1, 2008

science
found it rats but thanks
May 29, 2008

science
What mammal order has the following dental formula 006/406
May 29, 2008

Elglish
What are all of the sigular and plural pronouns?
May 19, 2008

Math
How would I graph the inequality x<2y-y^2 or is there even a way that I could graph it?
May 18, 2008

Math
I need help with these probability problems. 1). Five chips are selected from a bag without replacement. The bag originally contained 6 yellow chips and 8 red chips. In how many ways can you choose 5 chips from the bag? I did 14 C 5 and got 2002, is that correct. 2). In how ...
May 16, 2008

Math
I need help with this problem: Two planes start from Los Angeles International Airport and fly in opposite directions. The second plane starts ½ hour after the first plane, but its speed is 80 kilometers per hour faster. Find the airspeed of each plane if 2 hours after ...
May 14, 2008

Pre-Calculus
I need help solving this logarithmic equation: ln x + ln (x+3) = 1. I know ln x + ln (x+3)=ln [x(x+3)] and that is ln x^2 + 3x when broken down. Then you have to get rid of ln by taking the natural base e of both sides so in the end you have x^2+3x = e^(1). That's when I ...
May 3, 2008

British Literature
According to the characters in the book, their lives have been improved. Through genetic engineering everyone is conditioned to love their job, social class, and lifestlye they are "destined" to have. Reading, I think it ways it has improved; however, this presents ...
April 28, 2008

Math
How would I find the expression of the nth term sequence given the terms of 2, 1, 4/5, 5/7, 6/9 and the expression of the nth term sequence given the terms of 1/2,-1/4,1/8, -1/16?
April 22, 2008

math riddle ALGEBRA WITH PIZZAZZ
her brother said he want him red handed
April 6, 2008

Algebra
You're supposed to graph each equation when, 2x+3y=9
March 24, 2008

earth
thank you
March 9, 2008

earth
What happens when a cold surface water current collides with a warm surface water current?
March 9, 2008

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