Most popular questions and responses by Demi
  1. Physics

    I'm understanding most of this physics, but here is one last question I would appreciate help on. Thank you! Okay, so the question involves a figure. A link to the question and the picture with it is below can be found by googling the question along with

    asked on March 26, 2010
  2. physics

    A rifle is used to shoot twice at a target, using identical cartridges. The first time, the rifle is aimed parallel to the ground and directly at the center of the bull's eye. The bullet strikes the target at a distance of HA below the center, however. The

    asked on September 5, 2010
  3. eco

    Most countries, including the United States, import substantial amounts of goods and services from other countries. Yet there's also saying that a nation can enjoy a high standard of living only if it can produce a large quantity of goods and services

    asked on November 2, 2008
  4. Physics

    I appreciate any help! Thank you!! How much energy must be added to a bowl of 125 popcorn kernels in order for them to reach a popping temperature of 175 degrees Celsius? Assume that their initial temperature is 21 degrees Celsius, that the specific heat

    asked on March 26, 2010
  5. chemistry

    How many grams of NH4Cl will dissolve at 50 degrees C?

    asked on February 14, 2017
  6. Physics

    A Jeweler working with a heated 47g gold ring must lower the ring's temperature to make it safe to handle. If the ring is initially at 99 degrees Celsius, what mass of water at 25 degrees Celsius is needed to lower the ring's temperature to 38 degrees

    asked on March 26, 2010
  7. physics

    A bird watcher meanders through the woods, walking 0.45 km due east, 0.60 km due south, and 2.70 km in a direction 37.0° north of west. The time required for this trip is 4.00 h. (a) Determine the magnitude and direction (relative to due west) of the bird

    asked on September 5, 2010
  8. algbra 1

    A farm has only sheep and geese. It has a total of 58 animals and a total of 150 legs on the animals. How many sheep and geese are on the farm?

    asked on May 25, 2015
  9. chemistry

    Which of the following molecules is polar? 1. CH4 2. BH3 3. NH3 4. CF4 5. H2

    asked on March 16, 2010
  10. math

    if a car drives at a speed of 90km/h for 2 hours and 20 minutes. How far does the car drive?

    asked on March 27, 2019
  11. physics

    A motorcycle daredevil is attempting to jump across as many buses as possible (see the drawing). The takeoff ramp makes an angle è = 18.0° above the horizontal, and the landing ramp is identical to the takeoff ramp. The buses are parked side by side, and

    asked on September 5, 2010
  12. math

    A ship sails due north from a position 5 degrees, 28' South Latitude to position 6 degrees, 43' North Latitude. Given that one minute of latitude is equivalent to 1 nautical mile, the ship has sailed a distance of A. 75 nautical miles B. 371 nautical miles

    asked on August 14, 2014
  13. Physics

    Thank you for any help and assistance. Here is the question/problem: Because of the pressure inside a popcorn kernel, water does not vaporize at 100 degrees Celsius. Instead, it stays liquid until its temperature is about 175 degrees Celsius, at which

    asked on March 28, 2010
  14. biology

    If you toss a coin and it comes up tails on eight consecutive tosses, what is the likelihood it will come up heads on the ninth toss?

    asked on April 3, 2011
  15. physics

    A rock climber throws a small first aid kit to another climber who is higher up the mountain. The initial velocity of the kit is 17 m/s at an angle of 50° above the horizontal. At the instant when the kit is caught, it is traveling horizontally, so its

    asked on September 5, 2010
  16. physics

    A sky diver, with parachute unopened, falls 625 m in 15.0 s. Then she opens her parachute and falls another 348 m in 146 s. What is her average velocity (both magnitude and direction) for the entire fall?

    asked on August 30, 2010
  17. physics

    In a football game a kicker attempts a field goal. The ball remains in contact with the kicker's foot for 0.050 s, during which time it experiences an acceleration of 360 m/s2. The ball is launched at an angle of 46° above the ground. Determine the

    asked on September 5, 2010
  18. math-Probablity

    A student is writing a multiple choice test consisting of 40 questions, each of which provides four possible choices. He is certain that he has 16 questions correct. If he guesses for all of the remaining 24 questions, what is the probability that he will

    asked on June 5, 2012
  19. physics

    A person looking out the window of a stationary train notices that raindrops are falling vertically down at a speed of 6.6 m/s relative to the ground. When the train moves at a constant velocity, the raindrops make an angle of θ = 36° when they move past

    asked on September 6, 2010
  20. physics

    A drag racer, starting from rest, speeds up for 402 m with an acceleration of +20.0 m/s2. A parachute then opens, slowing the car down with an acceleration of -5.20 m/s2. How fast is the racer moving 3.75 102 m after the parachute opens?

    asked on August 30, 2010
  21. algebra

    The formula b=27a, is used in New England to estimate the minimum furnace output, b, in BTUs, for a modern house with a square feet of flooring. What is the minimum furnace output for BTUs? What is the answer to A? I have searched and listened to all kinds

    asked on January 8, 2011
  22. Organic and Nuclear Chemistry

    Regarding nuclear reactions that release a great deal of energy, which statement is true? A. In a fission chain reaction, a uranium nucleus struck by a high-energy neutron emits two neutrons. B. Nuclear fission releases more energy per unit mass than does

    asked on June 25, 2010
  23. Religion

    Judaism is based on the bond between God and________?

    asked on September 16, 2009
  24. Pre-Algebra

    Express as a unit rate: $5 for 10 cans of soup.

    asked on May 19, 2009
  25. History

    Compare and Contrast the similarities and differences of the Universal Declaration of Human Rights and The Declaration of Independence

    asked on November 10, 2014
  26. Physics

    A girl at a ropes course pulls herself upward using a cage and pulley system. There combined mass is 64 kg. A)Calculate the force she pulls down with to raise herself at constant speed. B)Calculate her acceleration if she increases her force by 8%.

    asked on October 10, 2017
  27. Physics

    A spring with a spring constant of 531 N/m is used to propel a 0.363-kg mass up an inclined plane. The spring is compressed 37.7 cm from its equilibrium position and launches the mass from rest across a horizontal surface and onto the plane. The plane has

    asked on April 4, 2015
  28. physics

    A 3kg mass is attached to end of a light rod and made to move clockwise in a vertical circle of radius 2m and speed of 6m/s. The tension in the rod at the lowest point is most nearly A. 54N B. 84N C. 30N D. 24N E. 39N

    asked on January 4, 2015
  29. Physics

    Determine the coefficient of friction between a girl's skis and the snow when she skis down a 20° degree hill and her ending speed is exactly two-fifths of what it would have been if the slope had been frictionless.

    asked on October 15, 2017
  30. Math - Algebra

    In a thin rectangular tin sheet 8x12 sheet, you have to cut a rectangular opening. The area of the opening has to be 45 feet, and its edges have to have an equal distance from the edges of the sheet. Determine this distance.

    asked on May 8, 2014
  31. chemistry

    calculate the hydroxide ion concentration in a solution of almond extract PH.3.8.state if almond is basic or acid

    asked on April 25, 2013
  32. Physics

    A stone is thrown directly upwards with an initial speed of 34.5 m/s . What is the maximum height the stone will reach?

    asked on January 29, 2011
  33. Calculus

    Kayla claims that she can find an approximate value for sin 1o without using a machine to do any computations. Explain or show how she can do this (Hint: if you choose to explain the process, please be very specific. If you choose to show how it is done,

    asked on February 22, 2017
  34. Physics

    A 2kg mass moving at 10m/s slows to speed of 4m/s while sliding across a rough horizontal surface. The work done by friction is most nearly A. 116j B -116J C. 84j D. -84j E. -16j

    asked on January 4, 2015
  35. science

    what helps digest your food?

    asked on March 19, 2010
  36. Physics

    I'm having trouble with this question. Some __ objects emit no visible light but are known through __ and radio images; satellite observations __ Earth's atmosphere help scientist study space at wavelengths that do not reach Earth's surface. If you can

    asked on January 1, 2010
  37. maths

    I am equipment to 1/2 The sum of my numerator and denominator is 15 What fraction am I ?

    asked on February 10, 2018
  38. Social Science

    Where can I find information on the difference between English policing and American policing, without using wikipedeia? I found some information but is not showing a difference. Thank you

    asked on November 22, 2014
  39. Calc

    Find the x–coordinate of the point on the parabola y=x^1/2 nearest to the point (4, 0).

    asked on November 9, 2014
  40. english

    Paraphase - to cut a long story short, one day I decided to be a man about my feelings

    asked on February 26, 2014
  41. space

    what are connstellations? thanks. xx.

    asked on January 17, 2009
  42. Calc

    Find the x–coordinate of the point on the parabola mc002-1.jpg nearest to the point (4, 0).

    asked on November 9, 2014
  43. painting

    What are some of the charateristics of Baroque Art

    asked on April 27, 2010
  44. 7th grade


    asked on April 6, 2009
  45. U.S. History

    Was Brown v. Board of Education the most important event in breaking down the legal foundations of the Jim Crow system? I want to argue yes, but I can't think of anything creative, only things that are obvious. Any ideas?

    asked on February 8, 2009
  46. Science

    What Alkalis are there that i would find in my house for like cleaning ect and what is the strongest alkali. thank-you x

    asked on January 14, 2009
  1. Maths


    posted on November 5, 2016
  2. Human Growth and Reproduction

    we have the name!!!!!

    posted on March 23, 2016
  3. health

    Me too!!

    posted on March 23, 2016
  4. Human Growth and Reproduction

    yes, divide is correct

    posted on December 16, 2015
  5. math

    100 pennies

    posted on April 15, 2015
  6. Social Science

    Hello Thank you for your help

    posted on November 22, 2014
  7. health


    posted on October 17, 2014
  8. math

    thank you. i understand it better now

    posted on August 14, 2014
  9. Physics

    Thanks! I highly appreciate it!

    posted on January 1, 2010
  10. Algebra

    How long will it take to earn $525 in interest if $3500 is invested at a 6% annual interest rate?

    posted on May 19, 2009
  11. eco

    That's what I am confused too.

    posted on November 2, 2008