Shahab Mirza

A box of mass m = 6kg slides with speed v = 4 m/s across a frictionless floor. It suddenly explodes into two pieces. One piece, with mass m1 = 2kg moves in the same direction with speed v1 = 8m/s. Find the velocity of the second piece. Its answer is 2 m/s...

11 years ago

An electric rod of 2000 watts rating boils a certain quantity if water in 10 minutes, the heat is generated for boiling this water is? answer is 12 X 10^5 Joules, but I cant solve it please solve it

11 years ago

A constant force acting on body mass 5 kg changes its speed from 2 m/s to 7 m/s , the direction of motion remains unchanged, find FORCE. answer is 2.5, but help me solve it, thanks

11 years ago

A= 2i + 3j - k, B= 4i + 2j - 2k, Find a vector x parallel to A but has magnitude of B ? Answer is √12/7 (2i+3j) - K solve it , i have mcat admission test please solve it

11 years ago

If A = 3i + 6j -2k, then unit vector parallel to A will be answer is 3/7i + 6/7j - 2/7k solve it please, because i don't know how he got that answe thanks

11 years ago

The energy of an X-RAY quantum of wavelength 1.0 X 10^-10 m is. its answer is 1.99 X 10^ -15, but i don't know how to solve it , thanks help please

11 years ago

This type of question come in our exams usually that. If the Reaction P+Q → R + S is described as being of zero order with respect to P, it means that. Answer: THE RATE OF REACTION IS INDEPENDENT OF THE CONCENTRATION OF P. I want to ask that, what is such...

11 years ago

Nitrogen dioxide decomposes on heating according to the following equation 2NO2 (g) ↔ 2NO (g) + O2 (g) When 4 mole of nitrogen dioxide were put into a 1dm3 container and heated to a constant temperature, the equilibrium mixture contained 0.8 mole of oxyge...

11 years ago

Among the following electrons, which has highest energy? a. n = 3, l = 2, m = 0, s = + 1/2 b. n = 4, l = 0. m= 0 , s = - 1/s answer is A. but i want to know that how to get this answer help please?

11 years ago

Equal weights of methane and hydrogen are mixed in an empty container at 25 C. the fraction of total pressure exerted by the hydrogen is? answer is 1/9 i want to know that how to find out this answer thanks?

11 years ago

If we take 2.2 grams of CO2, 6.02 X 1021 atomes of nitrogen and 0.03 gram atoms of sulphar , then the molar ratio of C, N, and O is . answer is 5:1 :3 how to solve it help please , thanks

11 years ago

AgCl <------> Ag+ + Cl- , the Ksp for the reaction will be . Ksp = [Ag+] [Cl-] how?

11 years ago

CH ≡ CH + 2AgNO3 → AgC ≡ CAg + 2HNO3 represents which property of acetylene. A. Basic B Acidic. √ answer is acidic, now i want to ask that how we can know that in this question , acidic is the property of acetylene? help? someonoe told me that more bonds...

11 years ago

help. A rescue helicopter drops a package of emergency ration to a stranded party on the ground. If the helicopter is traveling horizontally at 40m/sec at a height of 100 m above the ground, where does the package strike the ground relative to the point a...

11 years ago

The Speed of train is reduced from 60km/h at the same time as it travels a distance of 450 m, If the reduction in speed is uniform , find how much further it will travel (approx) before coming to rest? Answer is 30m but how? See my solution , i solved it...

10 years ago

A car travelling with constant acceleration increases its speed from 10 m/s to 50 m/s over a distance of 60 m . how long does this take? a. 2 seconds b. 4 seconds . Data : Avg Velocity = 10 + 50 / 2 = 30m/s Distance = 60 meter time = ? Solution : S= V x T...

10 years ago

The problem statement, all variables and given/known data A body is thrown upward and remains in air for 10 seconds , the initial velocity at which it was thrown in is? The attempt at a solution g = -10 , t = 10 s , vf = 0 , vi = ? Vf = vi + gt 0=vi + (-1...

10 years ago

@damon , thanks sir

11 years ago

Thanks Sir, It helped me solve my MCAT questions

11 years ago

I FIGURED IT OUT SORRY FOR PROBLEM, Solution: speed changes from 2 to 7 , so 7-2 = 5/time = 5/10 = 0.5 X 5 = 2.5 Answers

11 years ago

@GanonTEK thanks bro , it helped me alot in studying my MCAT but still i don't understand that if there is -ve sign then why we have added all three? and why divided each term by 7? thanks

11 years ago

Thanks sir, I understand that information is lacking but I don't know why they have given such high level question for MCAT admission test :/ , anyway thanks

11 years ago

@GanonTEK , Thanks alot, I got how it works bro, btw your physics is nice and your concepts are good in physics , THanks sir

11 years ago

@ganonTEK thanks SIr, i was just confusing frequency so i got 3 X 10^ 8 frequency and then multiplied it by planks constant and got exact answer , thanks

11 years ago

@bobpursley , thanks for solution, but i still don't get it bro, what we did to 4 mole of N ? and 0.8 mol of O? help and how to write answer in this form 1.6^2 X 0.8 / 2.4^2 ?

11 years ago

@bobpursley , thanks but i have very little time left for exams so summarize to me in simple way if ur wish bro, tell me how to solve such questions quickly?

11 years ago

@bobpursley , Thanks alot i got it . Thanks Sir

11 years ago

@bobpursley . THanks , but tell me , what will happen if we will choose answer which has +1/2 . will this technique work for quick solution help?

11 years ago

@bobpursley , thanks , but what if we solve it like this bro. = ch4 has 16 molar mass, h2 has 2 molar mass, 1 mol ch4 contains 8 mol H2 . = moles of ch4 / moles of h2 + moles of ch4 = 1 / 8 + 1 = 1/9 answer in theoretical form. is it okay?

11 years ago

@bobpursley , yeah i am preparing for mcat and only 10 days are left, i have dozens of books but i am still confused in chemistry , specially organic chemistry and physical chemistry , time is also short , any tip?

11 years ago

@DrBob222 , someone solved it like this way but i was also wondering that how he got 1/9 :/ , these questions come in our MCAT , and have weird testing pattern, even many of students fail to answer such deep questions , we are given only 1 min to solve su...

11 years ago

@DrBob222 , thanks for reply, thanks sir

11 years ago

@DrBob222 , Thanks sir, but I still cant understand , help me out, see , 2.2g X 12/44 = 0.6 moles of CO2, so how to calculate Moles of N and O ?

11 years ago

@bobpurlsey , my question is 1st one not second one , help

11 years ago

@bobpursley, i know it sir but , someone told me that its hno3 in equation so its acidic whats that means?

11 years ago

@DrBob222 , thanks for reply sir, then what is proper way to describie it

11 years ago