Mable

Popular questions and responses by Mable
  1. chemistry

    The melting point of a compound is not influenced by which of the following? A. polarity B. electronegativity of its atoms C. Van der Waals forces D. hydrogen bonds E. isotope of carbon

    asked on May 13, 2008
  2. physics

    Car A with a mass of 1000kg is travelling east at 25m/s when it collides with car B, 2000kg, travelling north at 15m/s. After the collision, the two cars stick together and have the same velocity. Assume that they slide without friction after collision.

    asked on November 27, 2016
  3. chemistry

    Esters are A.found in some medicines B.often fragrant C.essential oils in fruits and flower D.found in some types of flavorings E.all answers are correct

    asked on May 13, 2008
  4. chemistry

    Suggest a type of reaction and the conditions required to breakdown polyamides into their monomers.

    asked on May 9, 2008
  5. calculus

    One litre of water at 0 degrees Celsius will have a different volume at higher temperatures. For a temperature 0 ≤ T ≤ 30 (in Celsius) this volume (in litres) is well approximated by the function V = −aT 3 + bT 2 − cT + 1 using the coefficients a =

    asked on February 21, 2017
  6. physics

    A 0.035 kg spherical oil droplet has charge of +1×10-7C. A uniform electric field is acting upwards as shown below. What strength of electric field is required to make the sphere float in the air without moving?

    asked on December 12, 2016
  7. chemistry

    The compound with the highest boiling point will be which of the following? A.CH3Cl B.CH3Br C.CH4 D.CH3F

    asked on May 13, 2008
  8. chemistry

    Carbon is able to form large numbers of organic compounds because carbon can A.form 4 bonds B.form single, double and triple bonds C.form chains, rings, spheres and sheets D.the carbon-carbon bond is very stable E.all answers are correct

    asked on May 13, 2008
  9. chemistry

    An amine is characterized by what functional group? A.-CO2CH3 B.-NH2 C.-CO2H D.-CHO E.-OH

    asked on May 13, 2008
  10. chemistry

    What types of linkage joins the nucleotides a) within a single DNA strand and b) between two single DNA strands?

    asked on May 7, 2008
  11. chemistry

    What functional group(s) must be present in a monomer of a condensation reaction?

    asked on May 5, 2008
  12. physics

    You're driving on the freeway going 90km per hour and it starts to rain. The raindrops make an angle of 40 degrees with the vertical when viewed through the driver's side window. What is the speed of the raindrops measured by someone at rest relative to

    asked on May 27, 2017
  13. biology

    Are the DNA template strand and the mRNA sequences similar, or complementary? Are the DNA coding strand and the mRNA sequences similar, or complementary? Are the DNA template and the DNA coding strand sequences similar, or complementary?

    asked on May 23, 2017
  14. physics

    A person is running from a cliff into a pond. The cliff has a height of 10.0m above the water but it is not strictly vertical, it slopes down to the pond at an angle of 40 degrees with respect to the vertical. What is the minimum speed the person needs to

    asked on May 21, 2017
  15. calculus

    It is a dark clear night. The air temperature is 15◦ C. A body is discovered at midnight. Its temperature is 23◦ C. One hour later, the body has cooled to 20◦ C. Use Newton’s law of cooling to determine the time of death.

    asked on March 29, 2017
  16. calculus

    find dt/dx t=((a^2+x^2)^1/2)/v1 + ((d^2+b^2)^1/2)/v2

    asked on March 2, 2017
  17. calculus-snell's law

    Suppose A light ray starts at the point A = (0,a) in an uniform medium 1 where the speed of light is c1 and then passes through an uniform medium 2 where the speed of light is c2 reaching point B = (d, −b). The line separating the two media is the

    asked on March 2, 2017
  18. calculus- optimization

    A rectangle is inscribed into a semi circle at radius 2. What is the largest area it can have and what are the dimensions Answers Area= 4 max base =2sqrt2 height = sqrt2 Help is always appreciated :)

    asked on March 1, 2017
  19. calculus

    it is assumed that f is differentiable and that w has an absolute maximum at t0 w(t)= f(t)/(c+t) derivative is f'(t)(c+t)-f(t)/(c+t)^2 Show that f(t0) = f′(t0)(C + t0). I'm having a bit of trouble in the above question. I keep getting f(t0)=

    asked on March 1, 2017
  20. calculus

    w(t)= f(t)/(c+t) w'(t)=? I got f'(t)(c+t)-f(t)/(c+t)^2 as the derivative and I'm having a hard time trying to prove that f(t_0) = f'(t_0) (C+t_0) Help is always appreciated :)

    asked on February 28, 2017
  21. physics

    A positive charge with Q1= +210-6 C and a negative charge Q2 = -1×10-6 C are located at an equal distance 0.1m from the origin (see below). A third charge Q3=+110-6C is located at the origin. Calculate the magnitude of the net force exerted on

    asked on December 12, 2016
  22. physics

    A 2 kg block with initial velocity +2m/s collides with a stationary 6 kg block with initial velocity 0m/s on a frictionless surface. After the collision, the 2 kg block is moving at –1 m/s and the 6kg block is moving to the right at +1 m/s. Show that the

    asked on December 12, 2016
  23. physics

    A 100 kg car is traveling at 20m/s over the top of a circular hill as shown below. The radius of the circle is 200 m. What force does the ground exert on the car at the top of the hill? After reaching the top of the hill, the car descends a vertical

    asked on December 12, 2016
  24. physics

    A 2 kg block is being pulled by a rope with a tension of 3N at an angle of 45° as shown. The coefficients of friction are μk=0.4 and μs=0.5. Does the block slide or not?

    asked on December 12, 2016
  25. physics

    A 1000 kg car is initially at rest. If the motor does 10,000J of work on the car, what is the car’s final speed? (Neglect friction, and assume that the car is on level ground.)

    asked on December 12, 2016
  26. physics

    A 5kg block has an initial velocity of 15 m/s and is sliding along a surface with friction. Eventually the block comes to rest. what is the change in thermal energy of the block and the surface ?

    asked on December 12, 2016
  27. physics

    a stone that is thrown near the surface of the earth. There is no air resistance. Position increases in the up direction. The initial velocity is 30 m/s at 30 degrees above the horizontal. what is the velocity when the stone reaches its maximum height ?

    asked on December 12, 2016
  28. science

    how many atoms of magnesium are in the magnesium molecule?

    asked on October 29, 2012
  29. hhs 265 accounting

    calculating the current ratio of the XYZ nonprofit corporation balance sheet using appendix b.

    asked on March 7, 2009
  30. chemistry

    How many grams of copper is deposited from an aqueous solution of copper sulfate, (CuSO4(aq)), by passing one mole of electrons into a copper plating cell? A. 254g B. 127g D. 42.3g E. 31.8g

    asked on May 24, 2008
  31. chemistry

    Suggest a type of reaction and the conditions required to breakdown polyamides into their monomers.

    asked on May 9, 2008
  32. chemistry

    Draw three repeating units of the condensation polymer made from ethanedioic acid and ethanediol. if anyone has a weblink that illustrates this may you please send it?

    asked on May 9, 2008
  33. chemistry

    Construct the following using molecules of your choice: a) a polyester and b) a polyamide. Each drawing should have four monomers and should be original in its structure. Your polymers can not be biochemical (carbohydrate, lipid, protein, etc.). Identify

    asked on May 9, 2008
  34. chemistry

    Explain in terms of molecular structure why sugars have a relatively high melting point compared to hydrocarbons of a similar size.

    asked on May 7, 2008
  35. algebra

    Quartics using P(X) = af(b(x-c)+d Recall Q(X) = (x-2)(x-1)(x+1)(x+2) a)Choosing a (i) Rewrite Q(x) for a. Let b = 1, c = 0 and d = 0 (ii) Make 3 copies of the same function on your calculator Let a= -1, 1 and 2 Your equations are Y1= __________(a=-1) Y2=

    asked on May 7, 2008
  36. geometry

    A drug company is testing new toothpaste in 2 flavors, regular and cinnamon. In a sample of 193 people, 121 liked regular, 112 people liked cinnamon, and 46 liked both.

    asked on January 22, 2013
  1. Algebra

    collect like terms -- remember that double negatives makes a positive

    posted on March 1, 2017
  2. Algebra

    collect like terms and simplify 4x^2-5x^2=-x^2 -3x=8x-11x 8=6+2 final answer : -x^2-3x +8

    posted on March 1, 2017
  3. calculus

    it is assumed that f is differentiable and that w has an absolute maximum at t0 Show that f(t0) = f′(t0)(C + t0).

    posted on March 1, 2017
  4. math plzzz help quick

    (1) x-y=-11 (2) y+7=-2x rearrange the equation 1 to get y by itself -> x=-11+y substitute that in equation 2 y+7=-2(-11+y) and solve for y

    posted on February 6, 2017
  5. chemistry

    Explain in terms of molecular structure why sugars have a relatively high melting point compared to hydrocarbons of a similar size.

    posted on May 7, 2008