Akbar

Most popular questions and responses by Akbar
  1. Physics

    In a hydraulic lift, the radii of the pistons are 2.93 cm and 10.1 cm. A car weighing W = 11.0 kN is to be lifted by the force of the large piston. (a) What force Fa must be applied to the small piston? N (b) When the small piston is pushed in by 10.4 cm,

    asked on April 9, 2012
  2. math

    Can somebody solve this system of euation :2^x+3^y=17 2^x+2+3^y+1=5

    asked on January 23, 2016
  3. physics

    A 1.6-m-long string fixed at both ends vibrates at resonant frequencies of 792 Hz and 990 Hz, with no other resonant frequency between these values. (a) What is the fundamental frequency of this string? (b) When the tension in the string is 1165 N, what is

    asked on April 15, 2012
  4. physics

    Humans can hear sounds with frequencies up to about 20.0 kHz, but dogs can hear frequencies up to about 40.0 kHz. Dog whistles are made to emit sounds that dogs can hear but humans cannot. If the part of a dog whistle that actually produces the high

    asked on April 17, 2012
  5. physics

    A tire with an inner volume of 0.0250 m3 is filled with air at a gauge pressure of 30.3 psi. If the tire valve is opened to the atmosphere, what volume outside of the tire does the escaping air occupy? Some air remains within the tire occupying the

    asked on April 22, 2012
  6. physics need help plz

    An arrangement of two pulleys, as shown in the figure, is used to lift a 49.6-kg mass a distance of 3.70 m above the starting point. Assume the pulleys and rope are ideal and that all rope sections are essentially vertical. (a) What is the mechanical

    asked on June 8, 2012
  7. Physics Please someone help please

    A 34 g glass thermometer reads 21.6°C before it is placed in 135 mL of water. When the water and thermometer come to equilibrium, the thermometer reads 38.7°C. What was the original temperature of the water? -.135(4186)(Tf-38.7)=.034(840)(Tf-21.6)

    asked on April 26, 2012
  8. physics

    A 34 g glass thermometer reads 21.6°C before it is placed in 135 mL of water. When the water and thermometer come to equilibrium, the thermometer reads 38.7°C. What was the original temperature of the water? I need help on this please could someone

    asked on April 26, 2012
  9. Chemistry

    1) 800 mL of 0.025 M Pb(NO3)2 is mixed with 500 mL of 0.030 M K2CrO4. Calculate the grams of PbCrO4 that form. I am confused on how to do this I got the answer it should be 4.85 g PbCrO4, but I would want to know how to get that. And also Limiting reactant

    asked on April 4, 2012
  10. Physics

    An arrangement of two pulleys, as shown in the figure, is used to lift a 49.6-kg mass a distance of 3.70 m above the starting point. Assume the pulleys and rope are ideal and that all rope sections are essentially vertical. (a) What is the mechanical

    asked on June 11, 2012
  11. Chemistry

    3) 0.3382 g of an unknown diprotic acid, when dissolved in water, required 32.34 mL of 0.1046 M KOH to reach the endpoint. Calculate the molar mass of the unknown acid. Also, for this problem I keept getting 99 close to 100 g/mol, but the answer has to be

    asked on April 4, 2012
  12. physics

    An arrangement of two pulleys, as shown in the figure, is used to lift a 49.6-kg mass a distance of 3.70 m above the starting point. Assume the pulleys and rope are ideal and that all rope sections are essentially vertical. (a) What is the mechanical

    asked on June 13, 2012
  13. physics

    An arrangement of two pulleys, as shown in the figure, is used to lift a 49.6-kg mass a distance of 3.70 m above the starting point. Assume the pulleys and rope are ideal and that all rope sections are essentially vertical. (a) What is the mechanical

    asked on June 11, 2012
  14. physics

    A 34 g glass thermometer reads 21.6°C before it is placed in 135 mL of water. When the water and thermometer come to equilibrium, the thermometer reads 38.7°C. What was the original temperature of the water? I need help on this please could someone

    asked on April 25, 2012
  15. physics

    A 34 g glass thermometer reads 21.6°C before it is placed in 135 mL of water. When the water and thermometer come to equilibrium, the thermometer reads 38.7°C. What was the original temperature of the water? I need help on this please could someone

    asked on April 24, 2012
  16. Physics

    A 1.6-m-long string fixed at both ends vibrates at resonant frequencies of 792 Hz and 990 Hz, with no other resonant frequency between these values. (a) What is the fundamental frequency of this string? (b) When the tension in the string is 1165 N, what is

    asked on April 15, 2012
  17. physics

    In a hydraulic lift, the radii of the pistons are 2.93 cm and 10.1 cm. A car weighing W = 11.0 kN is to be lifted by the force of the large piston. (a) What force Fa must be applied to the small piston? 925.7 N (b) When the small piston is pushed in by

    asked on April 9, 2012
  18. physics

    Tension is maintained in a string by attaching one end to a wall and by hanging a 2.34 kg object from the other end of the string after it passes over a pulley that is 2.00 m from the wall. The string has a mass per unit length of 3.45 mg/m. What is the

    asked on April 15, 2012
  19. physics

    An arrangement of two pulleys, as shown in the figure, is used to lift a 49.6-kg mass a distance of 3.70 m above the starting point. Assume the pulleys and rope are ideal and that all rope sections are essentially vertical. (a) What is the mechanical

    asked on June 7, 2012
  20. Physics

    A block of wood, with density 828 kg/m3 , has a cubic shape with sides 0.340 m long. A rope of negligible mass is used to tie a piece of lead to the bottom of the wood. The lead pulls the wood into the water until it is just completely covered with water.

    asked on April 10, 2012
  21. physics help plz thanks

    An arrangement of two pulleys, as shown in the figure, is used to lift a 49.6-kg mass a distance of 3.70 m above the starting point. Assume the pulleys and rope are ideal and that all rope sections are essentially vertical. (a) What is the mechanical

    asked on June 2, 2012
  22. physics

    You are on Mars and would like to send a probe into space so that it does not fall back to the surface. What minimum launch speed do you need? (The mass of Mars is 6.42x10^23 kg and the radius of Mars is 3.40x10^6 m) km/s Please someone also help me on

    asked on June 2, 2012
  23. Physics Please help

    A block of wood, with density 828 kg/m3 , has a cubic shape with sides 0.340 m long. A rope of negligible mass is used to tie a piece of lead to the bottom of the wood. The lead pulls the wood into the water until it is just completely covered with water.

    asked on April 10, 2012
  24. Physics

    A block of wood, with density 828 kg/m3 , has a cubic shape with sides 0.340 m long. A rope of negligible mass is used to tie a piece of lead to the bottom of the wood. The lead pulls the wood into the water until it is just completely covered with water.

    asked on April 10, 2012
  25. Physics

    Tension is maintained in a string by attaching one end to a wall and by hanging a 2.34 kg object from the other end of the string after it passes over a pulley that is 2.00 m from the wall. The string has a mass per unit length of 3.45 mg/m. What is the

    asked on April 15, 2012
  26. Physics

    A 34 g glass thermometer reads 21.6°C before it is placed in 135 mL of water. When the water and thermometer come to equilibrium, the thermometer reads 38.7°C. What was the original temperature of the water? I need help on this please could someone

    asked on April 24, 2012
  27. chemistry

    Ans me plxxx Identify the hydrogen bonding in DNA and ice......

    asked on January 22, 2016
  28. physics

    Plz plz answer this question..... I need this immediate.... "what is ment by the energy-mass relationship?explain it with the help of examples.....

    asked on January 20, 2016
  29. Math

    a JACUZZI IS 3FT DEEP SEATS 6 PEOPLE 2'WIDE PER SEAT 150 CUBIC FEET

    asked on January 2, 2011
  1. A.V. M. Sr. sec. school faridabad

    Answer is 60 days...!

    posted on December 16, 2015
  2. physics need help plz

    there is a mass hanging down through a pulley and the at the right there is another pulley and than the rope is at the left and F force applied I don;t know how to explain it n i cant paste it

    posted on June 8, 2012
  3. physics

    This is how I did it: (.034)(840)(21.6-38.7)+135(4186)(Ti-38.6)

    posted on April 25, 2012
  4. Physics

    I got 15.43 degree Celsius but its wrong. I don't know why please help. Thank you!

    posted on April 24, 2012
  5. physics

    Thank you Damon and Bobpursley. I really appreciate it.

    posted on April 23, 2012
  6. physics

    Thank you!

    posted on April 9, 2012
  7. Physics

    Thanks for your help, I really appreciate it! The only thing I was wondering about is part b) it says its wrong i know it's 3.02 cm, but the answer has to be in mm i got that that would be 30.2 mm, but still its wrong can you please say why I am getting it

    posted on April 9, 2012
  8. Chemistry

    Thanks; I really appreciate it!

    posted on April 4, 2012
  9. Chemistry

    Thank you for your help and time!

    posted on April 4, 2012