uma

Most popular questions and responses by uma
1. Chemistry

a) Ammonia, an important source of fixed nitrogen that can be metabolized by plants, is produced using the Haber process in which nitrogen and hydrogen combine. N2(g) + 3H2(g) → 2NH3(g) How many grams of nitrogen are needed to produce 325 grams of

asked on September 15, 2014
2. linear programming

The Pyrotec Company produces three electrical products-clocks, radios and toasters. These products have the following resources requirements : Resource Requirements Cost/Unit Labor Hours/Unit Clock \$7 2 Radio 10 3 Toaster 5 2 The manufacturer has a daily

asked on June 6, 2012
3. Physics

Two cars of same mass are moving with velocities v1 and v2 respectively. If they are stopped by supplying same breaking power in time t1 and t2 respectively then v1/v2 is?

asked on August 17, 2017
4. Science - physics

A circular wire of radius R carries a total charge Q distributed uniformly over its circumference. A small length of wire subtending angle teta at the centre is cut off. Find the electric field at the centre due to the remaining portion

asked on April 14, 2012
5. linear programming

Exeter Mines produces iron ore at four different mines; however, the ores extracted at each mine are different in their iron content. Mine 1 produces magnetite ore, which has a 70% iron content; mine 2 produces limonite ore, which has a 60% iron content;

asked on June 6, 2012
6. federal tax

As part of their divorce agreement, Harry transfers to Mary, his former spouse, GM stock with a market value of \$30,000. Harry had \$20,000 invested in the stock. How does this transfer affect Harry, and what is Mary's basis in the stock?

asked on October 3, 2018
7. statistics

A class consists of 50 students, 20 of them are girls and boys, 10 them are rich and remaining poor, 5 of them are fair complxioned, 3 are intelligent. What is the probability of selecting a fair complexioned rich intelligient girl?

asked on February 20, 2011
8. linear programming

Mountain Laurel Vineyards produces three kinds of wine Mountain Blanc, Mountain Red, and Mountain Blush. The company has 17 tons of grapes available to produce wine this season . A cask of Blanc requires 0.21 tons of grapes, a cask of Red requires 0.24

asked on June 6, 2012
9. physics

A thin disk, mounted on a frictionless vertical shaft of negligible rotational inertia, is rotating at 495 revolutions per minute. An identical disk (that is not initially rotating) is dropped onto the first disk. The frictional force between the disks

asked on August 4, 2010

The Pyrotec Company produces three electrical products-clocks, radios and toasters. These products have the following resources requirements : Resource Requirements Cost/Unit Labor Hours/Unit Clock \$7 2 Radio 10 3 Toaster 5 2 The manufacturer has a daily

asked on June 6, 2012
11. physics - electrostatics

A charged particle of mass m of 1 kg and charge q = 2 uC is thrown from a horizontal ground at an angle teta = 45 degree with speed 20 m/s. In space a horizontal electric field E = 2 x 10^7 V/m exist. Find the range on horizontal ground of the projectile

asked on April 14, 2012
12. 3 D - geometry (direction of cosines)

Find the angle between the lines between the lines whose direction cosines satisfy the equations l + m + n = 0 and 2mn + 3nl - 5lm =0.

asked on March 10, 2012
13. physics - Heat transfer

A round scar of area 'A' is formed on the chest of a man of temperature 37C. The rate of heat radiated from this scar is 1% more than that from the remaining part of the body. What will be the excess temperature at this scar over other parts of the body?

asked on February 5, 2012
14. chemistry

How to calculate [Co3+] in equilbrium with [co(NH3)6]3+ when 10.0 g of Co (No3)3 is dissolved in 250.0 mL of 1.00 M NH3?

asked on April 15, 2011
15. linear programming

Brian Q’ Rourke, owner of The Horse & Hound Pub in Dublin, is preparing for St. Patricks Day, amd he must determine how much cider to stock. Brian sells three brands of cider on tap – Murphy’s Blackton, and red Rye. The cost per gallon (to the pub

asked on June 6, 2012
16. algebra

If the lengths of a pair of opposite sides of a square were tripled and the other pair were each increased by 7 cm,the new figure would be rectangle with a perimeter 96 cm find the dimensions of the original square

asked on April 9, 2016
17. Chemistry

What volume of dioxygen is required for complete combustion of 2 volumes of acetlyene gas at NTP? Ans is 5 volumes but I m not getting it....

asked on August 20, 2017
18. linear programming

Brian Q’ Rourke, owner of The Horse & Hound Pub in Dublin, is preparing for St. Patricks Day, amd he must determine how much cider to stock. Brian sells three brands of cider on tap – Murphy’s Blackton, and red Rye. The cost per gallon (to the pub

asked on June 6, 2012
19. grammar

Identify the intransitive and transitive verbs in the sentence .Also give an object for the transitive verbs.1. Harsha laughed .2.My mother was having .

asked on August 19, 2009
20. science

A body starts from rest, the ratio of distances travelled by the body during 3rd and 4th seconds is -

asked on February 12, 2017
21. D P S dehradun

Plz calculate area. A-B=28.9 yard. B-C = 33.11 yard. C-D== 30.1 DA= 36.2 yard

asked on October 10, 2015
22. math

A certain number has a remainder of 3 when divided by 5. That same number has a remainder of 2 when divided by 4. If "y" is an integer between 10 and 40, what is one possible value of y?

asked on August 13, 2013
23. Lakshman

A 2M box is set on top of a 12M box. There is friction beween the masses. The 12M box is pushed against a spring. The spring is compressed a distance X by a 12 M mass. The 2M box does not slide from its position on top of the 12M mass. (the two masses are

asked on December 12, 2011
24. American History

could the west have been settled with less conflict with the native americans? at what cost to people and land did the mining, ranching and farming booms come?

asked on October 26, 2009
1. physics

0.2

posted on September 9, 2016
2. chemistry

In 14g of 14^C,no.of neutrons =8NA In 1g of 14C,no.of neutrons =8NA/14 1)the total no.of neutrons in 7mg of 14^C= 7/1000×4/7×6×10^20 =24×10^20 2)given mass of a neutron=mass of 1 Hydrogen atom=1 amu Mass of 24×10^20 neutrons=1×24×10^20×1.6×10^-24

posted on July 20, 2015
3. math 101

Each can of paint will cover 450 tiles. Augustin is painting 300 tiles in his bathroom, 675 in his kitchen, and 100 in his hallway. How many cans of paint does he need to buy?

posted on September 30, 2014
4. physics

252.08 kg/s/s

posted on October 13, 2010