Lynette

Popular questions and responses by Lynette
  1. math

    An element has a half-life of 30 years. If 1.0 mg of this element decays over a period of 90 years, how many mg of this element would remain? Begin amount is 1.0 elapsed time is 90y half life 30 years n=9/30 n=3 90/2^2 90/8 = 11.25mg thinking it's wrong

    asked on March 24, 2017
  2. physics

    Two point charges are on the y-axis. A 3.0 µC charge is located at y = 1.35 cm, and a -2.04 µC charge is located at y = -1.50 cm. (a) Find the total electric potential at the origin (V) (b) Find the total electric potential at the point having

    asked on September 9, 2010
  3. Science

    An element has a half-life of 30 years. If 1.0 mg of this element decays over a period of 90 years, how many mg of this element would remain? Begin amount is 1.0 elapsed time is 90y half life 30 years n=9/30 n=3 90/2^2 90/8 = 11.25mg thinking it's wrong

    asked on March 24, 2017
  4. physics

    Suppose that you wish to fabricate a uniform wire out of 0.900 g of copper. Assume the wire has a resistance R = 0.500 , and all of the copper is used. (a) What will be the length of the wire? (m) (b) What will be the diameter of the wire? (µm)

    asked on September 17, 2010
  5. Science

    1. A convex mirror with a focal length of -20cm forms an image 15cm behind the surface. If the object height is 1.2cm what is the image height? 2. An object is placed 10cm in front of a mirror and an image is formed that has a magnification of 2. Which of

    asked on July 26, 2011
  6. Math

    Solve the system equations y=4x+8,x^2+7x-20 I'm truly lost

    asked on March 27, 2017
  7. Precalculus

    1.Write the expression as a sum or difference. cos(5x)cos(-4x) 2.Write the expression as a product. cos(4x)-cos(12x)

    asked on December 5, 2010
  8. Algebra

    If you walk 4/5mile and then jog 3/8 mile what is the total distance covered how much farther did you walk than jog

    asked on February 14, 2017
  9. Physics

    A man enters a tall tower, needing to know its height. He notes that a long pendulum extends from the ceiling almost to the floor and that its period is 28.0 s. (a) How tall is the tower? m (b) If this pendulum is taken to the Moon, where the free-fall

    asked on December 5, 2010
  10. algebra 1

    Find the radius if a circular lid with an area of 12inch ^2. using (y-h^2 (y-k)^2=r2 I'm pretty confused any help would be great.

    asked on March 31, 2017
  11. physics

    A high-voltage transmission line with a resistance of 0.28 /km carries a current of 1030 A. The line is at a potential of 720 kV at the power station and carries the current to a city located 165 km from the station. (a) What is the power loss due to

    asked on September 17, 2010
  12. Federal Employees Union Question--Please Help

    With respect to the powers of a federal employees union,which statement is True? 1. It can bargain to obtain better pay and benefits for employees. 2. It cannot lobby Congress for personnel policy changes. 3. It can overrule the decisions of the Office of

    asked on January 23, 2007
  13. chemistry

    a piece of iron measures 10.5cm by 5.25cm by 10.2mm and the density of theiron is 7.86g/cm cubed. what is the mass of the iron?

    asked on May 12, 2014
  14. accounting

    Moreno Industries has adopted the following production budget for the first 4 months of 2013. Month Units Month Units January 10,000 March 5,000 February 8,000 April 4,000 Each unit requires 3 pounds of raw materials costing $2 per pound. On December 31,

    asked on May 7, 2012
  15. physics

    What is the tangential acceleration of a bug on the rim of a 12.0 in. diameter disk if the disk moves from rest to an angular speed of 75 rev/min in 4.0 s?

    asked on November 21, 2009
  16. Chemistry

    Calculate the pH of 1.7M of KCl

    asked on July 4, 2012
  17. Physics

    A spring stretches 4.3 cm when a 13 g object is hung from it. The object is replaced with a block of mass 22 g that oscillates in simple harmonic motion, calculate the period of motion.

    asked on December 5, 2010
  18. Math

    Reduce to lowest terms 4a3c --------- 6a2b

    asked on December 17, 2012
  19. Math

    Find the points on the graph of the following function where the slope of the tangent line is equal to -5/2. f(x) = x+5/x-5 (x, y) = (smaller x-value) (x, y) = (larger x-value)

    asked on February 16, 2011
  20. Algebra

    if $1500 grew to $1575 with 4% simple interest how long was the money in the account?

    asked on September 22, 2010
  1. History

    Machine Guns for sure could wipe out a line of men.

    posted on April 3, 2017
  2. algebra 1

    I'm confused I turned it in that way and was told that wasn't the correct formula for algebra formula.So is there really a different way to write it?

    posted on March 31, 2017
  3. Ethics in Tech

    Ethics in Technology, pp.474 Answer B: Cooperative agreements

    posted on March 16, 2016
  4. intro to computers

    That is incorrect...It is not A

    posted on March 9, 2015
  5. soc 120

    #1-A,#2-A, #3-A, #4-A, #5-A,#6-A,#7-A,#8-A,#9-A,#10-A, #11-A,#12-A,#13-A,#14-5,#15-A,#16-A,#17-A,#18-A, #19-A,#20-A,#21-A, #22-A,#23-A, #24-A, #25-A.

    posted on July 31, 2011
  6. physics

    R=.28*165 (calc this) plug into following equation and that will give you W =I^2*R =1030^2*R b. P(loss)= IV =1030(720000)

    posted on September 17, 2010
  7. Ethics125

    i need help

    posted on February 14, 2010
  8. CheckPoint: Comprehensive Grammar CheckPoint

    1a,2a,3a,4a,5a,6b,7b,8a,9a,10a,11b,12b,13b,14b,15a,16a,17b,18b,19b,20a,21a,22b,23a,24a,25b,

    posted on October 3, 2008