martina

Newest questions and responses by martina
  1. Science

    Angle of refractions! I need help finding angle of incidence in air(or water or glass) it is for one of my labs. It iOS in a data table though.

    asked on April 20, 2018
  2. Science

    what weight of NaCl is needed to prepare 200mls of a 250ppm Na solution?

    asked on October 6, 2016
  3. Physics

    Two soccer players, Mary and Jane, begin running from nearly the same point at the same time. Mary runs in an easterly direction at 3.61 m/s, while Jane takes off in a direction 63.3o north of east at 5.44 m/s. How long is it before they are 23.6 m

    asked on September 12, 2015
  4. Physics

    Starting from the constant-acceleration kinematic equations, write a formula that gives vf in terms of t, xi, xf, and a. Starting from the constant-acceleration kinematic equations, write a formula that gives t in terms of xi, xf, vi, and vf.

    asked on September 4, 2015
  5. Math

    Explain how to use hundredths grids to subtract 1.65 - 0.98.

    asked on September 23, 2014
  6. chemistry

    a compound contains 5.2% by mass Nitrogen. It also contains carbon, hydrogen and oxygen. Combustion of 0.085g of the compound produced 0.224g of carbon dioxide and 0.0372g of water. Calculate the empirical formula of the compound.

    asked on October 8, 2013
  7. STATS

    Suppose a researcher observed from the analyses carried out the F-values 4.41 and 1.11. Which of the two cases are likely averages not come from the same population (ie, differences not statistically significant); a) none of the above b) 1.11 c) 4.41

    asked on October 4, 2013
  8. STATS

    A statistically significant F value means that: a) The influence of the independent variable is less than the error b) he observed differences between groups are due to individual differences of the values and the error c) An effect of the independent

    asked on October 4, 2013
  9. STATS

    The error calculated by ANOVA includes: a) The variation due to experimental error b)The variation due to the influence of third variables c)The variation due to the influence of individual differences between the values d) a, b and c

    asked on October 4, 2013
  10. chemistry

    balance: CaCl2 + AgNO3 → AgCl + Ca(NO3)2

    asked on January 7, 2013
  11. chemistry

    which of the following is not spontaneous process at 25 degrees celsius and 1 atm pressure? ice melting iron rusting salt dissolving steam condensing water boiling

    asked on April 30, 2012
  12. sewing

    when plannin a one piece facing for the armhole of a sleeless dress, the grain line of the facing should be taken from the

    asked on April 16, 2012
  13. sewing

    What lenght of material with the jacket sleeve in Ms Ms Troy

    asked on April 15, 2012
  14. Chemistry

    A 10.0-mL solution of 0.30 M NH3 is titrated with a 0.100 M HCl solution. Calculate the pH after the following additions of the HCl solution: a) 0.00 mL b) 10.0 mL c) 30.0 mL d) 40.0 mL

    asked on May 2, 2011
  15. Chemistry

    A solution is made by mixing exactly 500 mL of 0.178 M NaOH with exactly 500 mL of 0.100 M CH3COOH. Calculate the equilibrium concentrations of H+, CH3COOH, CH3COO-, OH-, and Na+.

    asked on May 2, 2011
  16. AP Physics

    A long, straight wire carries a current of 740 mA. A thin metal rod 45 cm long is oriented perpendicular to the wire and moves with a speed of 1.8 m/s in a direction parallel to the wire. What are the size and direction of the emf induced in the rod if the

    asked on April 9, 2011
  17. language check please

    SUFFIXES: -dairy=dairies -ability=abilities -cry=cries -journey=journies -liberty=liberties -dictionary=dictionaries -worry=worries -cherry=cherries -lady=ladies -supply=supplies -lazy=lazyness -penney=pennies

    asked on April 15, 2010
  18. math please help

    One day, a person went to horse racing area, Instead of counting the number of human and horses, he instead counted 74 heads and 196 legs. Yet he knew the number of humans and horses there. How did he do it, and how many humans and horses are there?

    asked on April 2, 2010
  19. science

    what is the difference between water on the surfaace of crystals and hydrate water itself?

    asked on September 13, 2007
  20. Calc

    A rectangular storage container with an open top is to have a volume of 15m^3. The length of the base is twice the width of the base. Material for the base costs $6 per square meter. Material for the sides costs $7 per square meter. Find the cost of the

    asked on March 30, 2007
  1. Math

    Thank you for the help

    posted on January 12, 2018
  2. Science

    working not really clear. can you please explain further.

    posted on October 8, 2016
  3. Life orientation

    plz help us with homework

    posted on May 27, 2015
  4. STATS

    Thank you both of you... And I agree with you... Because it it depends on the dfs so is tricky to connect the higher p-value with higher probability for significance whithout knowing the dfs.

    posted on October 5, 2013
  5. STATS

    Agree with you... Thank you so much!

    posted on October 5, 2013
  6. STATS

    I agree with you.. I support it.. Thank you!!

    posted on October 5, 2013
  7. STATS

    Thank you mathGuru... I believe the same but there is a confusion with the word "suppose".... It doesnt ask which is..It says to suppose.. which from the two given values has the higher possibility to not be statistically significant.. Do you stil support

    posted on October 5, 2013
  8. Science Help! I have a deadline!!

    this is pretty simple...if you have the time to put this on here..use google to answer this

    posted on January 7, 2013
  9. Chemistry

    I don't even know where to start. There is no volume for HCl and am not sure how the equation is suppose to look like. I'm just confused about this problem.

    posted on May 2, 2011
  10. Chemistry

    yes 7.11E-10 was the right answer thank you very much for the help :)

    posted on May 2, 2011
  11. Chemistry

    I calculated all of them and this is what I got: 1) [H+] = 2.56x10^-13 M 2) [OH-] = .039 M 3) [Na+] .089 M 4) [CH3COO-] = .05 5) [CH3COOH] = 0 All of them were right except number 5 and I don't know what the answer to number 5 is suppose to be.

    posted on May 2, 2011
  12. 7th grade science

    well i am sorry i know i did a bad thing and i am sorry damon well this might help u the flow of matter and energy is more than one thing it doesn't have one exact definition and i am sorry ms sue

    posted on April 17, 2010
  13. 7th grade science

    now, do u understand?

    posted on April 17, 2010
  14. 7th grade science

    could be fluid through a pipe or wind through the air or gamma rays through space or electrons through a Cathode Ray Tube

    posted on April 17, 2010