# Posts by Praveen

Total # Posts: 23

Physical Science
How much energy is released when 10 gm of steam at 100 degree Celsius turns to ice at 0 degree Celsius

Math
In an examination of 100 marks a person attempted 77 questions and got 42 correct answer and 35 wrong answer. If each correct answer carried 2 marks and wrong answer carried 0.50 marks. How much total marks the person scored?

arithmetic
A set of 7 numbers has a mean of 9. What additional number must be included in this set to create a new set with a mean that is 3 less than the mean of the original set?

Answer: \$9.94/pound Shop paid: 600 lbs X \$5.59 = \$3,354 Assuming 10% spoilage, shop really purchased only 540 lbs at a total cost of \$3,354 The cost to the shop including the spoilage = \$6.21/lb 60% markup = \$9.94/lb

math(urgent)
if x+ y is 25 more than x-y then x is what percent of y ?

math
if x y is 25 more than x-y then x is what percent of y ?

math
i think B is correct

physics
A thin steel hoop of weight W and radius r starts from rest at A and rolls down along a circular cylindrical surface of radius a as shown in Fig. G. Determine the angle defining the position of point B where the hoop will begin to slip if the coefficient of friction at the ...

Science
What will be the vapor pressure of Mono Chloro Benzene at 180 - 250 degree Celsius.

chemistry
heat gained by rod + heat lost by H2O = 0 [mass Fe x specific heat Fe x (Tfinal-Tinitial)] + [mass H2O x specific heat H2O x (Tfinal-Tinitial)] = 0 32.2*0.450*(58.6-22.3)+m*4.179*(58.6-63.9)=0 525.987=m*22.148 m=23.748 grams

chemistry
heat gained by rod + heat lost by H2O = 0 [mass Fe x specific heat Fe x (Tfinal-Tinitial)] + [mass H2O x specific heat H2O x (Tfinal-Tinitial)] = 0 32.2*0.450*(58.4-22.8)+m*4.179*(58.4-63.7)=0 515.844=m*22.148 m=23.3 grams

Physics
A capacitor of 4.5 MF, charged to 50v, is connected to another capacitor of = MF, charged to 100v. The total energy of the combination is

If a particle's motion is described as x = ut+1/2at^2, where x is position, t is time and u and a, are constants. Show that the acceleration of the particle is constant

A bus is moving with a velocity of 10m/s. A motor cyclist wishes to overtake the bus in 60 seconds. With what velocity the motor cyclist should chase the bus which is 1km ahead of him?

An aircraft has a take-off speed 180km/h and length 250m from the start just before take-off a serious snag is detected in the engine and the aircraft failed to take-off. There is a wall at a distance 'd' = 230m ahead of the take-off point. The pilot applies breaks ...

An aircraft has a take-off speed 180km/h and has length 250m from the start just before take-off a serious snag is detected in the engine and the aircraft failed to take-off. There is a wall at a distance 'd' = 230m ahead of the take-off point. The pilot applies breaks...

The answer to this question is 62.5s. Can you please explain it properly what is that Vf^2 = 2ad

The maximum speed of a bus is 72km/h, it accelerates uniformly at the rate of 1m/s^2 and retards uniformly at the rate of 4m/s^2. Find the least time in which it can do a journey of 1km ?

So what can i do and please keep your lecture to yourself. I also know aht u wrote!!! And please help me and don't give moral lecture. N i didn't insult or make fun of anyone i just wanted help which i didn't get because you wrote something else out here!!!

science
what is the immediate response of human body soon after a poisoning.what type of reactions take place?