Friday
February 5, 2016

# Posts by Elisabeth

Total # Posts: 102

Physics
A 30-06 caliber hunting rifle fires a bullet of mass 0.0101 kg with a velocity of 279 m/s to the right. The rifle has a mass of 3.46 kg. What is the recoil speed of the rifle as the bullet leaves the rifle? Answer in units of m/s.
December 3, 2015

Physics
What is its centripetal acceleration? Answer in units of m/s 2 .
November 11, 2015

Physics
An athlete swings a 2.01 kg ball horizontally on the end of a rope. The ball moves in a circle of radius 0.98 m at an angular speed of 0.44 rev/s. What is the tangential speed of the ball? Answer in units of m/s.
November 11, 2015

science
the small piston of a hydraulic press has an area of 2.0 cm and the large piston has an area of 16 cm if the small piston has a force of 4.0 N applied to it the output force of the large piston is
November 11, 2015

algebra
4/5 x -3 3/4 x 2 1/2 =
May 6, 2015

Science
March 3, 2014

history,geograph,life science,life orentation,mathematical literacy,english
1.with my school subjects which careers can i study and the entrance requirement for the particular courses and fees and accommodation cost.
February 24, 2014

Math/Science
Explain how you could determine, give the following 3 pieces of information, (you need all 3 together not each one individually) the radius of the Earth. 1)Jakarta and Port Moresby, the capital of pau New Guinea, are two cities on the equator. 2) A plane leaves from Port ...
November 6, 2013

Astronomy
For this question assume the moon is 110 of its diameter away from the Earth. The largest apparent size of Mercury that we ever see in the sky is 1/150 the apparent diameter of the Moon. The diameter of Mercury is about 4900 km. What is the closest that the Earth and Mercury ...
August 27, 2013

Science
A jet aircraft is traveling at Mach 2.5 through air at 1 °C. What is the jet's speed in m/sec? I can do the equation myself, I just need to know what equation I need to do in order to find the answer.
April 3, 2013

Religion
I need help interpreting this question, In Isaiah 38 how did Hezekiah feel when he found out he was going to die, some typical or expected things? thanks
October 15, 2012

psychology
Can you help reccomend a good theorist and theory to type an 8 page report to find journal articles as well. I was thinking possibly Freud psychoanaylis theory or maslow hoistic dynamy theory thanks
October 10, 2012

Math
Find the value of n. 2^(2n-1) = 8^(-n)
August 30, 2012

Math
3. It takes 72 tiny cubes to fill an empty box. It is found that the volume of the box is 576 ml. Know that 1 cc = 1 ml. How long is the side of the tiny cube.
August 29, 2012

Chemistry
What happens when red blood cells are placed in a solution that contains 0.99% (m/v) NaCl solution?
July 12, 2012

Math
Calculate the volume of a cylinder that is 5.615 mm in height and 17.03 mm in diameter.
July 9, 2012

Math Riddle-Algebra With Pizzaz
Did you hear about... i have a,b,c,d,e,f,g,n,o..its "the very sad guy who tried to..fog and thats all i have help?
January 11, 2012

Math
(a+bx)(c+dx)=income solve for x
December 5, 2011

Math
An auditorium has 1600 seats. At a ticket price of \$6, the owners can sell 1200 tickets. For each 25 cent increase in price the tickets sold reduces by 25. What price should the owners set to maximize the income? Income=(6+.25x)(1200-25x) Generalize and analyze this equation.
December 4, 2011

geometry
The radius of the inscribed circle is equal to twice the area of the triangle divided by the perimeter of the triangle. Prove that this relationship is true for the inscribed circle in any right triangle.
November 28, 2011

Physics
If the resistance of each of the light bulbs is 6.0 ohms, what resistance does the battery see?
November 8, 2011

Math
Find the sum of the first 12 terms of the sequences given in #1. a.f(n) = 5*(2)^(n-1) ; for n = 1,2,3,4,… b.a1 = 1/3 ; an+1 = = 3*an
November 5, 2011

physics
A 350-ohm resistor is connected in series with a 270-ohm resistor. What is their equivalent resistance in ohms?
November 2, 2011

physics
A 250-ohm resistor is connected in parallel with a 190-ohm resistor. What is their equivalent resistance?
November 2, 2011

physics
Candace threw a 0.09 kg ball at an angle such that the downwards initial velocity is 15.00 m/s and the horizontal initial velocity is 18.00 m/s. What is in m/s the vertical component of the velocity of the ball 0.20 seconds after she threw it? (Do not include units in your ...
September 28, 2011

physics
Kevin tosses a 0.10 kg ball horizontally with an initial velocity of 22.00 m/s. What is in m/s2 the vertical component of the acceleration of the ball 3.82 seconds after he threw it?
September 28, 2011

physics
A 10 kg cart was observed moving north with a speed of 15 m/s before it collided with an identical cart moving south at 10 m/s. The collision was observed to cause the carts to couple and move together as one. What is in kg m/s the combined momentum of both carts before the ...
September 20, 2011

physics
A 10 kg cart was observed moving north with a speed of 15 m/s before it collided with an identical cart at rest. The collision was observed to cause the carts to couple and move together as one. What is in Joules the kinetic energy of the system of both carts after the collision?
September 20, 2011

Physics
It takes 7.9 J of work to stretch a spring 4.6 cm from its unstressed length. How much (in J) spring potential energy is then stored by the spring?
September 16, 2011

physics
A 23.1 kg block is dragged over a rough, horizontal surface by a constant force of 95.0 N acting at an angle of angle 29.3 ° above the horizontal. The block is displaced 5.50 m, and the coefficient of kinetic friction is 0.341. Find the magnitude of the work done by the ...
September 15, 2011

physics
A block of mass M=1.0 kg is dragged over a horizontal surface by a force F=20.0N. The block is displaced a distance d=10.0 m, the friction force Ff is 5.0 N. What is the work done by the weight Fg?
September 15, 2011

physics
A 3.56 x 10-5 kg raindrop falls vertically at constant speed under the influence of gravity and air resistance. After the drop has fallen 83.8 m, what is the work done by gravity? Answer in units of milliJoule (a thousandth of a Joule) and use 9.8 m/s2 for g.
September 13, 2011

Physics
A block of mass M=1.0 kg is dragged over a horizontal surface by a force F=20.0N. The block is displaced a distance d=10.0 m, the friction force Ff is 5.0 N. What is the work done by the weight Fg?
September 13, 2011

Physics
A 46.0 kg man stands on a spring scale in an elevator. Starting from rest, the elevator ascends, attaining its maximum speed of 1.85 m/s in 1.07 s. It travels with this constant speed for the next 6.80 s. The elevator then slows down (undergoes a uniform acceleration in the ...
September 9, 2011

Physics
A 44.0 kg man stands on a bathroom scale in an elevator. Starting from rest, the elevator ascends, attaining its maximum speed of 1.90 m/s in 1.19 s. It travels with this constant speed in the upward direction for the next 7.60 s. The elevator then slows down (undergoes a ...
September 9, 2011

Physics
A raindrop of mass 61.60 mg (that is milli- gram) falls in quiet air (no wind). Due to the air resistance force, the drop has a maximum velocity called the terminal velocity of magnitude, 11.00 m/s, which is reached high above ground. What would be in N the weight of the rain ...
September 9, 2011

Physics
When out in space in International Space Station (ISS), Astronauts experience weightlessness. The ISS’s orbit is 354 km (that is 3.54 x 105 m) above the surface of the earth. The distance separating the center of the earth from the center of the ISS is then approximately ...
September 8, 2011

phsics
A student of weight 830 N was sent to another planet called Nerdland. If Nerdland has a mass that is three times the mass of the earth and a radius that is half the radius of the earth, what would be the mass in kg of the student when on Nerdland?
September 6, 2011

physics
A jogger runs in a straight line with an average velocity of v1=10.2 m/s for t1=6.0 min, and then with an average velocity of v2=7.7 m/s for t2=3.0 min. What is her total displacement? Answer in units of m.
August 24, 2011

physics
A jogger runs in a straight line with an average velocity of v1=6.6 m/s for t1=6.0 min, and then with an average velocity of v2=5 m/s for t2=3.0 min. What is her average velocity during this time? Answer in units of m/s.
August 24, 2011

geometry
if the width and height of the original 4in by 6in photograph is increased by a factor of 5,what are the dimensions of the enlargements?
May 11, 2011

math
Draw a segment 1 cm long Draw a segment 1 in long
January 6, 2011

math
1 meter^3 = _________centimeters^2 1 kilometer^2 = __________ meters^2
January 6, 2011

math
1 meter^3 = _________centimeters^2 1 kilometer^2 = __________ meters^2
January 6, 2011

math
1 meter^3 = _________centimeters^2 1 kilometer^2 = __________ meters^2
January 6, 2011

math
1 meter^3 = ________ centimeters^3
January 6, 2011

math
1 meter^3 = ________ centimeters^3
January 6, 2011

math
Two liters of water has a volume of ______ cubic centimeters and a mass of _______ kilograms.
January 6, 2011

math
A gallon of gasoline is more than _______ liters but a little less than ______ liters.
January 6, 2011

math
A two-liter bottle of soda is a little more than 2 _____ or 1/2 of a ____.
January 6, 2011

math
Two liters of water has a volume of __________ cubic centimeters and a mass of ________ kilograms.
January 6, 2011

Algebra
That actually makes sense. In the book, it mentioned something about angles, but I wasn't even thinking about opposite angles being equal. I did have her set the two equal to each other, and she came up with a realistic answer. What you said makes perfect sense. I will ...
November 26, 2010

Algebra
I see what you are saying, but that isn't it. It has something to do with setting one side equal to another. She has not started distribution that complicated yet. They still have her at 2(x+3). Right now, they are solving (for x) with two sided equations. When I say a big...
November 26, 2010

Algebra
I am helping my daughter with her algebra and we came across a symbol neither of us has seen before. She is solving two sided equations. For this problem, I do see it set up in the book, but it is related to geometry, which they have not covered. She says that they never ...
November 26, 2010

history
how does the caribbeans geography affect their economy?
September 27, 2010

Chemistry
For each definition, find a corresponding term from the following list: alkane,alkene, alkyne, alcohol, ether, aldehyde, ketone, carboxylic acid, ester, amine, fuctional group, isomers. a. Organic compounds with identical molecular formulas that differ in the order the atoms ...
July 20, 2010

Chemistry
For each definition, find a corresponding term from the following list: alkane,alkene, alkyne, alcohol, ether, aldehyde, ketone, carboxylic acid, ester, amine, fuctional group, isomers. a. Organic compounds with identical molecular formulas that differ in the order the atoms ...
July 20, 2010

Chemistry
Nonane has a density of 0.79 g/mL. and boils at 151 Celcius. a. What is the condensed structural formula of nonane b. Is it a solid, liquid, or gas at room temperature c. Is it soluable in water d. Will it float on water or sink
July 20, 2010

Chemistry
Write the condensed structural formula for each of the following molecules: a.ethylcyclopropane b. methylcyclohexane c. isopropylcyclopentane
July 20, 2010

Chemistry
The half-life of oxygen -15 is 124 seconds. If a sample of oxygen -15 has an activity of 4000 becquerels, how many minutes will elapse before it reaches an acivity of 500 becquerels
July 20, 2010

Calculus/Physics
Assuming that from the bottom to the top of the cliff is h1 and the top of cliff to the top of the parabola is h2... isn't the 100.1m really h1 + h2 (since the stone is thrown upwards)? I am looking for just h1.
July 8, 2010

Calculus/Physics
A stone is thrown from a cliff top with an upward velocity of 20 m/s. It takes 7 seconds for the stone to hit the ground at the bottom of the cliff. How high is the cliff? I know you use the equation of motion S(t)= (So)+(Vo)t-(1/2)gt^2 S(20)= (So) + 140 - 240.1 (So) = -100.1 ...
July 8, 2010

Calculus
I should add that my prof said in the notes that if the two answers to the two functions are the same, then it is not 1 to 1 BECAUSE they have the same answer. That's what has me confused.
June 25, 2010

Calculus
Is x^2 - 2x 1 to 1? I keep getting yes every way I try to work it. Book says no. In the end, I get (with x1=1 and x2=-1 <- I use these numbers because of the x^2) f(x1) = -1 and f(x2)=3. I can't seem to find if x1 = x2 (btw, I know that by the graph it is not, but I am ...
June 25, 2010

Physics
Just a typo on my part. The hiker's mass is the same as in my equation: 56.5. I just looked over the answers again. Most people answered the same as I did. A few of them put in scientific notation, but not like you did. they put 7.6X10^5 which doesn't make sense to me...
June 5, 2010

Physics
A 56.6kg hiker starts at an elevation of 1270m and climbs to the top of a 2660 peak. (I know the answers to B and C, I just have a question on A) A) What is the change in the hikers potential energy? I took PE=mg(h2-h1) and got (56.5)(9.8)(2660-1270)=769643J When I checked my ...
June 5, 2010

physics
I'll give you a hint: It's either Instantaneous Velocity, Speed, or Acceleration. I'll give you a few minutes to figure it out and I will tell you the answer :)
May 22, 2010

Calculus
I finished the first question with no problem. It was something like: Find the points at which f(x) [insert three equations for left right and in between here] is discontinuous. At each of these points, is f cont. from the right or the left? As I said, I solved that one. I am ...
May 22, 2010

Programming
I am not sure abut the rest, but how you have it set up to display pennies as a dollar amount isn't going to work. For an example, if you end up with 100 pennies at the end, and you multiply that by 100, you will get 10,000, not \$1.00. It would be easier if you set penny=....
May 22, 2010

math
use a vertical motion model to find how long it will take a walnut to reach the ground if it falls from the top of a 55-foot tree?
May 5, 2010

Discrete Math
I have a review problem I am having problems with. This is the problem: Be able to show the function, g(x) is O(f(x)) numerically as we have done in class Use the definition of O-notation to prove that 2x^2+3x+4 is O(x^2) (Do not use the theorem on polynomial orders) This is ...
April 14, 2010

Sports and Society in Ancient Greece and Rome
Thanks Sra I did check out those links and they don't give me what I need. I am very familiar with the story (It is one of my favorites). What I am trying to do is connect it with ancient Greek athletics (Wrestling, boxing, pankration, the different runs, javelin, discus, ...
April 5, 2010

Sports and Society in Ancient Greece and Rome
OK. I am trying to work on a project and I need help with one or two things. 1. I have come up with an idea, but can't seem to get it to fit in the fields of sports or society in the ancient world. I wanted to do a web page on Actaeon and Artemis, but I can't seem to ...
April 5, 2010

Paragraph
you seem to be missing parallel structure... "In the following paragraphs, I will be elaborating on her musical ambitions, such as the places she's performed, the people she's performed with, the pieces she's sung, and the awards she has won throughout this. ...
February 25, 2010

Social Studies
well, physical geographic factors include things like climate and vegetation and such so human geographic factors could very well be population, religious and cultural differences... it's just a guess... idk if that's right..
February 25, 2010

PHYSICS
Given: the linear expansion coefficient of glass is 9 x 10^-6 ('C)^-1. An automobile windshield has dimensions of 59 cm by 390 cm. What minimum spacing around the windshield is needed to prevent the windshield from breaking if the temp. changes by 146' F? answer should...
February 25, 2010

PHYSICS
The density of gasoline is 730 kg/m^3 at 0'C. One gallon of gasoline occupies .0038 m^3. Gasoline's volume expansion coefficient is .00096'C ^-1. How many kilograms of gasoline are obtained when 9 gallons of gasoline are bought @ 0'C rather than 18"c (temp...
February 25, 2010

math
add 19w. 36 = 13w + 41 then to solve: subtract 41 from both sides -5 = 13w divide by 13 on both sides w = -.3846... or (-5/13)
February 25, 2010

location
ur welcome... if only that someone (the drwls guy?) would help me in physics life would be a lot better :)
February 25, 2010

location
why don't u look burundi up on google... wikipedia says burundi is "small landlocked country in the Great Lakes region of Eastern Africa bordered by Rwanda to the north, Tanzania to the east and south, and the Democratic Republic of the Congo to the west. " u can...
February 25, 2010

english
Terry hated to lose and had to be better than everyone.
February 25, 2010

PHYSICS
The density of gasoline is 730 kg/m^3 at 0'C. One gallon of gasoline occupies .0038 m^3. Gasoline's volume expansion coefficient is .00096'C ^-1. How many kilograms of gasoline are obtained when 9 gallons of gasoline are bought @ 0'C rather than 18"c (temp...
February 25, 2010

PHYSICS
sorry for repeating it, but i was hoping to get a better answer because i didn't understand the one drwls gave last time...
February 25, 2010

PHYSICS
Given: the linear expansion coefficient of glass is 9 x 10^-6 ('C)^-1. An automobile windshield has dimensions of 59 cm by 390 cm. What minimum spacing around the windshield is needed to prevent the windshield from breaking if the temp. changes by 146' F? answer should...
February 25, 2010

physics
Given: the linear expansion coefficient of glass is 9 x 10^-6 ('C)^-1. An automobile windshield has dimensions of 59 cm by 390 cm. What minimum spacing around the windshield is needed to prevent the windshield from breaking if the temp. changes by 146' F? answer should...
February 25, 2010

Calculus
Let me try to ask this question a different way: 4x^2+2x+xy=12 and y(2)=-4 find y(prime)(2) by implicit differentiation. I can differentiate it to 8x+2+y+xy(prime)=0 I don't know what to do with the y(2)=-4 after this point.
February 25, 2010

Calculus
I saw this question asked, but I didn't understand the answer format. My prof doesn't use dx and dy after he has differentated the problem. He just uses (for example) 8x+2+y+xy(prime) The question is this: 4x^2+2x+xy=12 and y(2)=-4 find y(prime)(2) by implicit ...
February 24, 2010

help
haha... it's all cool :)
February 20, 2010

help
just go to google and type in the key words 2 ur questions....
February 20, 2010

s.s.
yep yep..... u could google most of these questions and come up with the right answers, you know?
February 19, 2010

s.s.
the great migration
February 19, 2010

s.s.
probably interest rates after fdr... either that or mortality rates... i mean, we did enter WWII after the great depression and fdr's new deal...
February 19, 2010

physics
thanks again to anyone who can possibly help!!!!! i wish i had a book or notes or something about this kind of stuff :( The linear expansion coefficient of glass is 9 x 10^-6 (`C)^-1. An automobile windshield has dimensions of 59 cm by 390 cm. What minimum spacing around the ...
February 19, 2010

physics
my teacher wasn't in school and this assignment is due @ 7am!!!!! The density of gasoline is 730 kg per cubic meter. One gallon of gasoline occupies .0038 cubic meters. Gasoline's volume expansion coefficient is .00096` C (^-1). How many extra kilograms of gasoline are...
February 19, 2010

physics
i'm still confused.... :(
February 19, 2010

physics
When a lead bullet hits a solid target at high speed, its entire kinetic energy is converted into heat. For simplicity, assume that all the heat is concentrated in the bullet rather than the target. If the bullet's initial temp. is 20` C, how fast should it be moving ...
February 19, 2010

physics
how much heat is required to vaporize 7 grams of ice initially at 0 degrees celsius when the latent fusion of ice is 80 cal/g, the vaporization of water is 540 cal/g, and the specific heat of water is 1 cal/(g x C)?
February 19, 2010

social studies
While black thursday is known as the day the stock market crashed, black tuesday was the day millions of panicked stock brokers sold over 16 million shares starting the great collapse.
February 19, 2010

Pre-Algebra
How do I find a linear relationship in a table? I really need help on this. And this is at a 7th grade level...
February 10, 2009

Physics-check
can you check my answers? 2.is more work required to bring a fully loaded truck up to a given speed, than the same truck lightly loaded? defend your answer? -more work is required to bring a fully loaded truck up to a given speed because it is doing more work since it is fully...
October 17, 2007

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