Most popular questions and responses by Po
  1. Chemistry

    Explain the difference in acidity of MgO dissolved in water and of P4O10 in water in terms of position of the element in the periodic table and bonding. I found MgO is basic and P4O10 is acidic

    asked on November 16, 2016
  2. Chemistry

    Explain the difference in acidity of MgO dissolved in water and of P4O10 in water in terms of position of the element in the periodic table and bonding. I found MgO is basic and P4O10 is acidic

    asked on November 17, 2016
  3. Physics

    A beam of partially polarized light can be considered to be a mixture of polarized and unpolarized light. Suppose a beam of partially polarized light is sent through a polarizing filter. The polarization direction of the filter can be changed by rotating

    asked on November 18, 2016
  4. la

    Selection 1: There's good news and bad news about grizzly bears in the American West. The good news? Their numbers have been increasing in recent years. In 1975, grizzlies made the threatened-species list under the federal Endangered Species Act. The bad

    asked on May 17, 2018
  5. Calculus

    A rectangular swimming pool is 8 m wide and 20 m long. Its bottom is a sloping plane, the depth increasing from 1 m at the shallow end to 3 m at the deep end. Water is draining out of the pool at a rate of 1 m3/min. How fast is the surface of the water

    asked on November 15, 2016
  6. Physics

    Light of wavelength 469 nm passes through a slit, creating a diffraction pattern on a screen. The angular separation between the first diffraction minima on either side of the central maximum is 6.0∘ . Determine the width of the slit. I used this

    asked on November 30, 2016
  7. Physics

    A student has a small battery-powered alarm buzzer. The student throws the buzzer toward a stationary wall (possibly due to frustration following a physics midterm examination). The buzzer emits sound with a frequency of 74 Hz, and the wall reflects the

    asked on October 21, 2016
  8. Physics

    Two glass microscope slides, of length 10 cm, are in contact at one end and separated by a sheet of paper at the other end, which creates a wedge-shaped film of air. The thickness of the paper is t = 59 μm, and the glass has index of refraction n = 1.5.

    asked on November 25, 2016
  9. Calculus

    Find the limit. Use l'Hospital's Rule if appropriate. If there is a more elementary method, consider using it. lim (tan(7x))^x x~>0

    asked on November 21, 2016
  10. Algebra

    Given below are equations for 2 planes in R3. 3x1 − 2x2 = 10 x1 + 2x2 + 4x3 = −2 Explain why these two planes must intersect in a line.

    asked on January 26, 2017
  11. Physics

    (a) Would the pattern change if you were to use a shorter wavelength of light? Clearly state what change(s) would occur (if any) and briefly explain why. (b) The apparatus is surrounded by air. Would the pattern change if it were immersed in water instead?

    asked on November 26, 2016
  12. Chemistry

    A 24 L welding tank contains of 285 bar of argon at 28 °C. Nitrogen is added to obtain an 80:20 argon:nitrogen mixture. a) What are the partial pressures of argon and nitrogen? b) What will be the total tank pressure?

    asked on November 20, 2016
  13. Calculus

    show that ((x − 1)/x) 1 Hint: try to apply the Mean Value Theorem to the functions f(x) = lnx and g(x) = xlnx. I'm having trouble applying the mean value theorem

    asked on November 14, 2016
  14. Algebra

    Given points A(1, 3, −2), P1(2, 0, −1) and P2(4, −2, −1) Find the point P on the line through P1 and P2 that is closest to A

    asked on January 25, 2017
  15. Calculus

    Can someone help find limit using l'hopital rule lim x → ∞ ((3x-4)/(3x+2))^(3x+1), I'm trying to solve by adding ln function to both side.

    asked on December 3, 2016
  16. Math

    can someone help me solve for x for this equation (0.5)(((cos(180-x))^(2))(cos(90-x))^(2))=0.0500

    asked on December 2, 2016
  17. Math

    can someone help me solve for x for this equation (0.5)(((cos(180-x))^(2))(cos(90-x))^(2))=0.0500

    asked on December 1, 2016
  18. Calculus

    Piecewise function x if −2≤x≤0; x^2 if −2

    asked on January 24, 2017
  19. Calculus

    Find inverse equation of y= 3e^(x-1)^5 Answer I got is (ln(x/3))^(1/5) +5 =y But I think it's wrong because the domain and range is really different from the original equation

    asked on January 22, 2017
  20. Linear algebra

    In R2 plot and describe the set of all points P whose position vector is of the form p = s(1, 1) + t(−1, 1), 0 ≤ s, t ≤ 1

    asked on January 19, 2017
  21. Algebra

    In R4 you are given the points P(2,2,2,2), Q(9,−5,1,3), R(6,8,−4,1) (a) Write out all possible arrows which can be formed using the points P,Q,R.

    asked on January 11, 2017
  22. calculus

    Could somebody help my find the critical points for y=(x-3)(x+2)^(2/3). When I take the derivative of the function I get is x=-2,3. But when I put the original function in wolfram alpha there is minimum at x=0

    asked on November 11, 2016
  23. Physics

    How would you derive the formula {-Ff+Fgx=ma} to show that µs=tanè

    asked on March 19, 2013
  24. physics

    A skier is going down a hill with a coefficient of friction of 0.21 and an angle of 7.5 degrees. if the skier has an initial velocity of 30 m/s, how fast will she be going after 10 s

    asked on March 17, 2013
  25. physics

    A Fletcher's trolley is set up over a cliff. If m1 = 40.5 kg (on top of the cliff) and m2 = 18.5 kg (hanging over the edge), what coefficient of friction is needed for the system not to move?

    asked on March 17, 2013
  1. social studies


    posted on April 23, 2019
  2. math

    Fresh raspberries contain 80% water. Dried raspberries contain only 20% water. How many pounds of dried raspberries do you get from 36 lb of fresh berries?

    posted on May 13, 2017
  3. Chemistry


    posted on February 20, 2017
  4. Calculus

    There is a typo 8-x if 2≤x≤3

    posted on January 24, 2017
  5. Chemistry


    posted on January 18, 2017
  6. Science

    I think its 1 km = 1,000 meters

    posted on October 7, 2016
  7. math


    posted on June 21, 2016
  8. world history

    I don't know. I don't even know why im on this website. Oh yeah, I NEEDED THE ANSWER!!!!!!

    posted on March 17, 2016
  9. Science-Physics

    po po po po po po po po po po po

    posted on May 1, 2015
  10. physics


    posted on March 23, 2015
  11. Chemistry


    posted on January 11, 2013
  12. Algebra

    #2 elimination 3x-7y=6 +2x+7y=4 ________ 5x =10 x =2 if x is 2, you plug it in 2(2)+7y=4 7y=4-4 y=0 (2,0)

    posted on December 1, 2008
  13. math

    plug 400 into x 350(400) - 70

    posted on December 1, 2008
  14. Math

    for the second one you take the log of both sides -x+3log9=log95 then you do algebra -x=(log95/log9) -3

    posted on December 1, 2008