Saturday

April 18, 2015

April 18, 2015

Total # Posts: 1,426

**College Physics**

A 42-kg girl is bouncing on a trampoline. During a certain interval after leaving the surface of the trampoline, her kinetic energy decreases to 220 J from 460 J. How high does she rise during this interval? Neglect air resistance. Just wondering how to solve this.
*March 16, 2012*

**College Physics**

Two newly discovered planets follow circular orbits around a star in a distant part of the galaxy. The orbital speeds of the planets are determined to be 43.5 km/s and 54.0 km/s. The slower planet's orbital period is 6.53 years. (a) What is the mass of the star? (b) What ...
*March 15, 2012*

**College Physics**

A skier is pulled up a slope at a constant velocity by a tow bar. The slope is inclined at 28.2 ° with respect to the horizontal. The force applied to the skier by the tow bar is parallel to the slope. The skier's mass is 46.7 kg, and the coefficient of kinetic ...
*March 15, 2012*

**College Physics**

A 45.7-g golf ball is driven from the tee with an initial speed of 46.0 m/s and rises to a height of 25.9 m. (a) Neglect air resistance and determine the kinetic energy of the ball at its highest point. (b) What is its speed when it is 6.82 m below its highest point?
*March 15, 2012*

**College Physics**

A 42-kg girl is bouncing on a trampoline. During a certain interval after leaving the surface of the trampoline, her kinetic energy decreases to 220 J from 460 J. How high does she rise during this interval? Neglect air resistance. The quarter is over but I am still trying to ...
*March 15, 2012*

**physics**

what is sqrt??
*March 15, 2012*

**Physics**

A person heats a can of soup on a stove. If he does 250 Joules of work ON the soup by stirring it as the burner adds 1675 Joules of heat, what is the change in its internal enegry? I did 250- 1675 because the work done On something is negative. can you tell me if thats right.
*March 11, 2012*

**HELP! College Physics**

A skateboarder shoots off a ramp with a velocity of 6.7 m/s, directed at an angle of 59° above the horizontal. The end of the ramp is 1.1 m above the ground. Let the x axis be parallel to the ground, the +y direction be vertically upward, and take as the origin the point ...
*March 10, 2012*

**history**

Which of the following is associated with the development of chain stores? A. R. H. Macy B. John Wanamaker C. Marshall Field D. F. W. Woolworth I think its d is that correct
*March 7, 2012*

**math**

I am not a teacher, but want to be one, and you don't have to believe my answer. I am a student that really loves math and it comes easy to me. rectangular pizza is larger by 155.44 in. rectangular is the better buy If each pizza has one inch of crust on the edges. ...
*March 7, 2012*

**College Physics Help**

Not sure how to apply the principle of conservation of mechanical energy.
*March 5, 2012*

**College Physics Help**

A thin rod (length = 1.10 m) is oriented vertically, with its bottom end attached to the floor by means of a frictionless hinge. The mass of the rod may be ignored, compared to the mass of the object fixed to the top of the rod. The rod, starting from rest, tips over and ...
*March 5, 2012*

**College Physics**

Never mind - I figured it out. Thanks for your help!
*March 5, 2012*

**College Physics**

Thank you! You answer is correct. My calculator is giving me 0.00345. I am not sure why. Do you think that it could be a setting that I need to change?
*March 5, 2012*

**College Physics**

Some bacteria are propelled by motors that spin hair-like flagella. A typical bacterial motor turning at a constant angular velocity has a radius of 1.1x10-8m, and a tangential speed at the rim of 2.0x10-5 m/s. (a) What is the angular speed (the magnitude of the angular ...
*March 5, 2012*

**math**

my answer is 18 what is yours
*February 28, 2012*

**math**

if 6 balls is 2/3s of aet how many in the whole set?
*February 28, 2012*

**Collision in One Dimension**

vf = (m1 v1i + m2 v2i) / (m1 + m2) = (57*2.2+77*4.5)/(57+77) =3.5 m/s
*February 26, 2012*

**Collision in One Dimension**

After skiding down a snow-covered hill on an inner tube, Ashley is coasting across a level snowfield at a constant velocity of +2.2 m/s. Miranda runs after her at a velocity of +4.5 m/s and hops on the inner tube. How fast do the two of them slide across the snow together on ...
*February 26, 2012*

**Conservation if Linear Momentum**

Figured it out! (V impact)^2/(2*g) V impact = (F ground*t)/m =6.07 m
*February 26, 2012*

**Conservation if Linear Momentum**

A student (m = 66 kg) falls freely from rest and strikes the ground. During the collision with the ground, he comes to rest in a time of 0.04 s. The average force exerted on him by the ground is +18000 N, where the upward direction is taken to be the positive direction. From ...
*February 26, 2012*

**math**

what is the lowest common denominator of 2/32 plus 4/28
*February 26, 2012*

**College Physic I**

A student (m = 66 kg) falls freely from rest and strikes the ground. During the collision with the ground, he comes to rest in a time of 0.04 s. The average force exerted on him by the ground is +18000 N, where the upward direction is taken to be the positive direction. From ...
*February 25, 2012*

**College Physic I**

Thank you so much!
*February 25, 2012*

**College Physic I**

A space probe is traveling in outer space with a momentum that has a magnitude of 4.99 x 107 kg·m/s. A retrorocket is fired to slow down the probe. It applies a force to the probe that has a magnitude of 1.87 x 106 N and a direction opposite to the probe's motion. ...
*February 25, 2012*

**physics**

a hot air balloon is hovering at an altitude of 6000 meters. The pilot decides that it is time to descend and turns off the balloon's burners.Once the balloon reaches the ground, the gas inside the balloon occupies 980 m cubed and is at atmospheric pressure. If the ...
*February 19, 2012*

**physics**

a hydraulic jack is used to move an 8896 newton car. if the area of the output piston is 8 times that of the input piston, how much input force is required to lift the car. i did Pi * 8 them multiplied that answer * 8896 then divided that answer times 8896. i dont think that ...
*February 19, 2012*

**College: HCA/220 Week 3 DQ 2**

i need help getting real fusteriated
*February 16, 2012*

**Chemistry**

I am having trouble too: If the heat from burning 6.000 g of C6H6 2C6H6(l) + 15O2(g) -> 12CO2(g) + 6H2O(l) + 6542 kJ is added to 5691 g of water at 21 °C, what is the final temperature of the water? Please tell me what I am doing wrong: 293,551= 5691*4.2*(Tf-21C) 293551...
*February 10, 2012*

**Chemistry**

Thank you so much!!! That helped me too!
*February 10, 2012*

**english**

This sentence keep showing up as a error in it. Could you please find the mistake and fix it for me. To obtain a position as an Administrative Assistant which I can use my knowledge and experiences toward the growth of this company.
*February 9, 2012*

**math**

A corporation borrowed $124,000 cash by signing a 5-year, 10% installment note requiring equal annual payments each December 31 of $32,711. What journal entry would the issuer record for the first payment?
*February 7, 2012*

**physics**

a dog escapes from his front yard a 3:15pm and is discovered 3.5 miles from home at 4:50pm. What is the dog's average speed in mph. how do you solve this i am lost
*February 7, 2012*

**Maths**

A farmer wishes to plant 6 trees in 4 rows so that each row contains 3 trees. How can this be done?
*February 6, 2012*

**Managerial Accounting**

Greetings, I just started my accounting class and I do not have any accounting experience of knowledge (my first acct class). Could you please help me out. I just need the traditional and ABC direct, indirect, and unallocated cost answer for the two accounting systems. You ...
*January 28, 2012*

**Math**

As many as three instructors are hired for a martial arts class each week. 4:1 student-to-instructor ratio is considered ideal. Find the maximum number of students at each of these classes.
*January 26, 2012*

**physics**

how do you calculate acceleration if the values are the same at t=2 seconds and t= 4 seconds.
*January 24, 2012*

**physics**

if a cart is released from rest and it takes 28 seconds to travel down a 10 meter incline what would be the average speed of the cart
*January 24, 2012*

**history**

one distinction you couldn't overlook when critically evaluating the information provided about the boston tea party
*January 24, 2012*

**chemistry**

A certain substance has a heat vaporization of 47.97 kJ/mol. At what Kelvin temperature will the vapor pressure be 7.50 times higher than it was at 297K? Please help me! I don't understand heat vaporization questions
*January 23, 2012*

**physics**

I CAN'T GET THE RIGHT ANSWER :( A 0.230 kg block on a vertical spring with spring constant of 4.25 multiplied by 103 N/m is pushed downward, compressing the spring 0.048 m. When released, the block leaves the spring and travels upward vertically. How high does it rise ...
*January 15, 2012*

**algebra**

Find the domain of the function g(x)=3/10-7x
*January 6, 2012*

**algebra**

-9-12(2-3y)= -25-2(y+6)
*December 8, 2011*

**algebra**

write the slope intercept euation for the line with slope -1/2 and y intercept (0,3) and graph the line.
*December 8, 2011*

**algebra**

write the slope intercept equation for the line that passes through (-5,10)and (-4,3)
*December 8, 2011*

**ALGEBRA**

what is -9y-12(2-3y)= -25-2(y+6)
*December 7, 2011*

**Chemistry-help**

0.5g of Solid A is dissolved in 1L solvent to give a concentration of concentration 0.5g/L. UV absorbance spectrum was collected. How to calculate the absorptivity on the dried basis?
*December 6, 2011*

**ALGEBRA**

determine if (-1/3,3) is a solution to 3x+8y=23
*December 5, 2011*

**math/117**

FOIL (8x^8-9)(x^9-5)
*December 4, 2011*

**Math**

Multiply (b+1/3)(b+1/5)
*December 4, 2011*

**math/117**

Which one is the answer? 3 or 2.54?
*December 4, 2011*

**math/117**

Jack usually mowes his lawn in 7 hours. Marilyn can mow the same yard in 4 hours. How musch time would it take for them to mow the lawn together?
*December 4, 2011*

**algebra**

write the equation for this situation the population, p, in thousands,can be approximated by the sum of 4 and one-half times the years since 1985,d. Then graph the equation and use the graph to determine the population in the town in 1995.
*November 30, 2011*

**algebra**

37.051 is 55.3% of what number.
*November 28, 2011*

**algebra**

Is x=6 a solution to -2x-4=-8 I think that it is yes.
*November 17, 2011*

**marketing**

Explain the importance of an organized new-product development process and illustrate how it might be used for (a) a new hair care product, (b) a new children’s toy, and (c) a new subscribers-only cable television channel.
*November 17, 2011*

**English- Due Soon**

Please check for any errors and correct them. Thank You. The word Divorce can make a lot of people feel hurt, angry, and depressed. But for others, it can mean the end to a bad or abusive marriage. Many people do not like to talk about it, but it can put a huge strain on kids...
*November 16, 2011*

**algebra**

what is the volume of a sphere with radius r is given by the formula v=4/3 r^3 Find the volume of sphere with radius 4 meters. use 3.14 for the value of x and round your answer to the nearest tenth.
*November 16, 2011*

**Chemistry**

What is the molecular geometry (shape) if you have 3 single bonds and 1 lone pair around the central atom?
*November 14, 2011*

**English- Due @ 8**

Ok Sra were those the only errors that you founded?
*November 13, 2011*

**English- Due @ 8**

Please chech for any errors and let me know if I need to change please correct it for me. Obesity is one of the major causes of health problems in the United States. According to Charles Schmidt, obesity is starting to catch up with smoking, which is causing illness and death...
*November 13, 2011*

**algebra**

Minute hand of a clock is 10 inches long. how far does the tip of the minute hand move in 15 seconds? I got that=5 pi BUT What speed is it moving in miles/hr???? algebra - PsyDAG, Sunday, November 13, 2011 at 1:38am Assuming it does move 5 pi, convert 5 * 3.1416 = 15.7 inches ...
*November 13, 2011*

**algebra**

Minute hand of a clock is 10 inches long. how far does the tip of the minute hand move in 15 seconds? I got that=5 pi BUT What speed is it moving in miles/hr????
*November 12, 2011*

**MATH**

2x -4y = 8 find the real number for x and y
*November 11, 2011*

**Psy**

Professor Klinger says that all of your ideas come from interaction with the environment rather than anything that you were born with. The professor is advocating a theoretical perspective based on a(n)___ view. A) tabula rasa b) contemporary c) moral d) ecological
*November 10, 2011*

**ALGEBRA**

9/16-(-3/16) SUBTRACT SHOW ALL OF YOUR WORK SIMPLIFY tHIS IS WHAT I GOT. 9/16+3/16=12/16=3/4 IS WHT I got.
*November 10, 2011*

**ALGEBRA**

SIMPLIFY 0.1/O i GOT 0 FOR THE ANSWER BECAUSE ANY NEMBER DIVIDED BY 0 IS UNDEFINED IS THAT CORRECT.
*November 10, 2011*

**ALGEBRA**

STATE THE RECIPROCAL. -1/10 MY ANSWER IS -10 I need to know if I am on the right track.
*November 10, 2011*

**ALGEBRA**

write the expression using exponents m*m
*November 10, 2011*

**algebra**

write the wxpression using exponents. m*m
*November 10, 2011*

**algebra**

add -90+17
*November 10, 2011*

**algebra**

simplify (-19)^2
*November 10, 2011*

**algebra**

simplify 0.1/0
*November 10, 2011*

**algebra**

c-(c^2)-7 for c=-6
*November 10, 2011*

**algebra**

3b-(-12-b)
*November 10, 2011*

**algebra**

simplify 5+5^2(23)-(-27)
*November 10, 2011*

**ALGEBRA**

-1/10 state the reciprocal.
*November 10, 2011*

**ALGEBRA**

-8/9*27 multiply. show all of your work.
*November 10, 2011*

**ALGEBRA**

9/16-(-3/16) subtract show all of your work. simplify
*November 10, 2011*

**English Help Please Due at 8am**

Please proofread for any errors. If you see any please correct them. Thank you. Obesity is one of the major causes of health problems in the United States. Research has been done about this topic for many years. It is more common in the United States because of all the ...
*November 9, 2011*

**algebra**

Evaluate 5x-3y x=3 and y=4 ----- 7
*November 8, 2011*

**MATH**

HOW DO I COME UP WITH THE REAL NUMBERS FOR X-2Y=200 THE REAL NUMBERS FOR X AND Y
*November 8, 2011*

**MATH**

X-4=300 HOW DO I FIND THE REAL NUMBER FOR X
*November 7, 2011*

**algebra**

-1/2*3/5*(-2/7)
*November 7, 2011*

**algebra**

COMBINE LIKE TERMS 14-(-5x)+ 2z-(-32)+4z-2x
*November 7, 2011*

**algebra**

perform the indicated operation and if possible,simplify please show all of your work. write your answer in lowest terms. 18/35 divided by 22/25
*November 7, 2011*

**algebra**

write a true sentence using either < or> -7.82 -7.802
*November 7, 2011*

**algebra**

TRASLATE THE FOLLOWING SENTENCE INTO AN EQUATION. dO NOT SOLVE TEN MORE THAN THREE TIMES A NUMBER IS 130.
*November 7, 2011*

**ENGLISH**

Ok I made the changes and also added some info. If you would please check it for errors I would appreciate it. Obesity is one of the major causes of health problems in the United States. Research has been done about this topic for many years. It is more common in the United ...
*November 6, 2011*

**ENGLISH**

Please check for any errors. If you would correct them i would appreciate it. Obesity is one of the major causes of health problems in the United States. Research has been done about this topic for many years. It is more common in the United States because of all the ...
*November 6, 2011*

**ALGEBRA **

use the associative law of addition to write an equivalent expression (r+st)+ 8
*November 6, 2011*

**algebra**

Write a true sentence using either < or> -7.82 -7.802
*November 6, 2011*

**algebra**

EVALUATE 5x-3y ________ for x=3 and y=4 7
*November 6, 2011*

**algebra**

x+10+3x=130
*November 6, 2011*

**algebra**

TRANSLATE THE FOLLOWING SENTENCE INTO AN EQUATION DO NOT SOLVE. tHIS IS WHAT I GOT Ten more than three times a number is 130.
*November 6, 2011*

**algebra**

use the associative law of addition to write an equilalent expression (r+st)+8
*November 6, 2011*

**algebra**

perform the indicated operation 7/5 * 8/3
*November 5, 2011*

**math**

how do you find the coordinate of x in the problem x-4y=100 in other words how do i find out what x is and 4y what do the y stand for how do i get it
*November 5, 2011*

**algebra**

order from least to greatest. -1/4, -2/3, 7, -8, 9
*November 3, 2011*

**AP Government**

I found that it ensures the members electoral advantage, and...?
*November 2, 2011*