# maha

Popular questions and responses by maha
1. ## National school

A dilute solution of sulfuric acid is added to 15g of copper and iron mixture. a) write the balanced equation for the occuring reaction. b) the volume of H2 evolved at standard conditions is 4.48L, what is the mass of each of the metals constituting the

2. ## science

find the distance covered when speed is 960 km/hr and time is 1hr 50min.

3. ## physics

fluid of constant density = 960 kg/m3 is flowing steadily through the above tube. The radius at the sections are r1 = 0.05 m, r2 = 0.04 m. The gauge pressure at 1 is P1 = 200 000 Pa and the velocity here is v1 = 5 m/s. We want to know the gauge pressure at

4. ## Physics

Two parallel slits are illuminated by light of two wavelengths one of which is 5.8*10exp -7m .On the screen the fourth dark line of known wavelength coincides with the fifth bright line of light unknown wavelength.Find the unknown wavelength?

5. ## Statistics

If two enents are independen, then

6. ## Probability

A student takes examination in four subjects A, B, C, D. His chance of passing in A is 4/5,in B is 3/4in C is 5/6 and in D is 2/3.To qualify he must pass in A and at least two other subjects. What is the probability that he qualifies?

7. ## physics

A beer is dropped from a window 30 m above the ground. How fast will it be moving just before it lands? (Neglect air resistance).

8. ## physics

A bicycle starts from rest and reaches 6.0 m/s after 4 seconds. What is its acceleration?

9. ## Chemistry

Is the Conversion of NO2 to HNO3 endo- or exothemic? Calculate the enthalpy and free energy change for the reaction 4NO2 + o2 + 2H2O-----> 4HNO3 in the aqueous phase.

10. ## BIOCHEMISTRY

By using the Henderson Hasselbalch equation,Calculate the Pka of lactic acid when the concentration of lactic acid is 0.01 molar. the PH is 4.80 and concentration of lactate is 0.87 molar

11. ## math(mechanics 1)

a car traveling on a straight road accelerates uniformly at a meter per second square from its initial speed of 20 meter per second until it reaches a speed of 30 meter per second. the car travels at this speed for 600 meter and then decelerates uniformly

12. ## b.mathematics

a shopkeeper allows a discount of 15% on his shop. how much money can a man save if he buys a bag costing rs2500, a shaving set costing rs890 and iron costing rs 2800?

A plane is flying east, ascending at a constant angle. Jack is standing on the ground, watching the plane come to (horizontally) directly at him. When he first sees the plane, at an angle of elevation of 15 degrees, its horizontal distance from him is

14. ## physics

A concrete wall of thickness one metre of a dam can withstand a side pressure of 10 5 2 N m- . Find the thickness of sidewall at the bottom of the water dam at a depth of 100 m. [ g = - 10 m 2 s and density of water = 10 3 kg/m3 ]

15. ## physics

A water main with a radius of 0.15 m contains water with an average velocity of 3 m/s .What is the flow rate in the water main?

16. ## Chemistry

Is the Conversion of NO2 to HNO3 endo- or exothemic? Calculate the enthalpy and free energy change for the reaction 4NO2 + o2 + 2H2O-----> 4HNO3 in the aqueous phase.

17. ## English

Which one of the following sentences uses pronouns correctly. A. Please give Paul and I your undivided attention. B. Jacob and me are going to set a meeting date. C. Carol told Sylvia and he the good news. D. Send the package to Tanya and him.

18. ## calculus

Find an equation of the tangent line to the graph y=(x^3 + 2)^5 at x= -1

19. ## statistics

mean wage of 5 employee is Rs.1000 of the wages of 4 emoloyee are Rs 800 rs 1200 rs 1300 rs 900.find the wages of 5th employee?

20. ## literary

what do we mean with the turning point in a story

21. ## Washington high school

The relation 3y=5x is an inverse variation where k is equal to 3/5

22. ## physics

Consider a marble moving on a horizontal track with a speed of 10 meters per second( ignore friction and air resistance). the marble leaves the track and falls through the air to the ground a vertical distance of 1.5 meters. how long does it take to for

23. ## English

Which one of the following sentences is grammatically correct. A. I really need to lay down. B. Sit it down over there by the window. C. I thought it would be best if I were to rise the curtin. D. The men came today to lay the carpet in the living room.

24. ## physics

Consider a marble moving on a horizontal track with a speed of 10 meters per second( ignore friction and air resistance). the marble leaves the track and falls through the air to the ground a vertical distance of 1.5 meters. how long does it take to for

25. ## U.S History

Please help me out with this question. I think I know the answer, but I'm not too sure. Thanks! Monroe's message stated that American foreign policy regarding European conflicts would be (a) neutral (b) de facto (c) nationalist (d) firm but friendly I know

26. ## silk

when was it discovered

1. ## physics

Zero

posted on June 12, 2017
2. ## Math

83%

posted on December 7, 2016
3. ## Math

if the of musician in a fanfare is between 21 and 49. which way does the musician have to stand to form the biggest number of rectangle

posted on October 30, 2016
4. ## java programming

5. Write program prompt a user to enter student degree and determine if student is pass or fail?

posted on March 8, 2016
5. ## Speed'Distance'Time

find the distance covered when speed is 960 km/hr and time is 1hr 50min.

posted on December 13, 2015
6. ## Finance

9%

posted on October 9, 2015
7. ## Chemistry

1.05IBs

posted on January 6, 2015
8. ## com101

1. We learned that the mayor had been engaging in a creative transfer of city employees' pension funds.

posted on September 27, 2012
9. ## health

Its not C :( Its either.. A or B

posted on August 31, 2012
10. ## Homework Help

its D :)

posted on August 29, 2012
11. ## Homework Help

No its not b

posted on August 29, 2012
12. ## math

y=6x-2 substitute value of y in second equation.it will become x=1 then find y .y=4

posted on March 4, 2012
13. ## U.S History

Oops, sorry, that's *nationalist.

posted on December 21, 2009
14. ## U.S History

Thanks for the help! =) Could you please explain why the answer be neutral than naturalist? I just want to understand why the answer is what it is.

posted on December 21, 2009
15. ## U.S History

Thanks. Could Ms. Sue answer this please, as well, if she's around?

posted on December 21, 2009