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Questions (38)

The velocity of sound in air at 27°celcius is 340m/s calculate the velocity of sound in air at 227°celcius ?
1. 0 answers
2. 580 views
A boy reaches his school 1.4km away in 1hr 40mins at what speed does he travels?
1. 1 answer
2. 1,020 views
Calculate net force when mass =2000kg, uniform velocity =60kg/hr
1. 1 answer
2. 488 views
A particle moves in a straight line with an acceleration a ms^-2 at time 't' seconds where a = - 1/t² when t=1 the particle has
1. 1 answer
2. 1,452 views
A particle moves according to the eqn a=-kv where a is acceleration and v is the velocity and k is a constant. If initial speed
1. 1 answer
2. 516 views
An astronaut is on the surface of planet whose air resistance is negligible. To measure the acceleration due to gravity(g) he
1. 1 answer
2. 1,161 views
A train starts from station A at 1pm and reaches station B at 3 pm, aftet travelling 108 km. It halts at station B for one hour
1. 1 answer
2. 923 views
For a particle undergoing rectilinear motion with uniform acceleration, the magnitude of displacement is one third the distance
1. 2 answers
2. 2,124 views
A lift starts from the top of a mine shaft and descends with a constant speed of 10 m/s. 4 s later a boy throws a stone
1. 5 answers
2. 2,220 views
A body starts with an initial velocity of 10m/s and moves along a straight line with a constant acceleration. When the velocity
1. 2 answers
2. 1,558 views
A toy plane p starts flying from point A along a straight horizontal line 20 m above ground level starting with zero initial
1. 5 answers
2. 5,640 views
The expression y=ax²+bx+c has always the same sign as of 'a' if:
1. 1 answer
2. 701 views
The equilibrium constant of the reaction CH3COOH (l)+C2H5OH (l)=CH3COOC2H5+H2O is 4.if one mole of each of acetic acid and ethyl
1. 5 answers
2. 4,566 views
The equilibrium constant of the reaction CH3COOH (l)+C2H5OH (l)=CH3COOC2H5+H2O is 4.if one mole of each of acetic acid and ethyl
1. 3 answers
2. 1,337 views
1. Log10²x+log10x²=log10² 2-12. Log4(log2x)+log2(log4x)=2 3. X^logx+5/3= 10^5+log x 4. Log 1/2(x-1)+ log
1. 1 answer
2. 1,077 views
1.Log10(x²-12x+36)=22.log4 log3 log2 x=0 3.log3 [log9x+1/2+9x]=2x 4.2log4(4-4)=4-log2(-2-x)
1. 1 answer
2. 749 views
1)if y=e^x . cot x then dy/dx will be2) f(x)=sin²x-cos²x then the value of f' (π/4)
1. 1 answer
2. 437 views
1)if y=x³+2x²+7x+8 then dy by dx will be-2) if y= 1/x⁴ then, dy by dx will be: 3) if y = x² sin x, then dy/dx will be-
1. 1 answer
2. 719 views
1) y=4+5x + 7x³. Find dy/dx2) if y= tan x cos²x then dy by dx will be-
1. 1 answer
2. 740 views
1)Y=x+x².+1/x+1/x³ find dy by dx2)y=x²+1/x². Find dy by dx
1. 1 answer
2. 320 views
1.∫ x³(x+1)dx2.∫ (1-cot²x)dx 3.∫ cosx(tan x + sec x) dx 4.∫ dx/√5x+8 using u= 5x+8 and using u= √5x+5
1. 1 answer
2. 849 views
1.∫ x³(x+1)dx2.∫ (1-cot²x)dx 3.∫ cosx(tan x + sec x) dx 4.∫ dx/√5x+8 using u= 5x+8 and using u= √5x+5
1. 1 answer
2. 689 views
1.∫ csc (u-π/2) cot (u-π/2) du.2.∫ sec^2(3x+2)ds 3.∫ √3-2s ds 4. ∫ 12(y^4+y4y^2+1)^2 (4^3+2y) dy use u= y^4+4y^2+1
1. 3 answers
2. 566 views
IF THE COEFFICIENT OF ROLLING RESISTENCE OF A CYLINDER OF RADIUS R=1FT ROLL FROM UNIFORM VELOCITY?
1. 0 answers
2. 968 views
Define cognitive bias and choose two that you may experience. Explain how you would use critical thinking to overcome cognitive
1. 1 answer
2. 532 views
A movie company wants to make movies featuring various monsters. They want each movie to have at least 2 different monsters and
1. 1 answer
2. 536 views
ABC is a triangle BD & CE are altitudes drawn from the vertex B & C. Prove that ABC is an isoceles triangle
1. 2 answers
2. 677 views
Use the Biot Savart law to compute the magnetic field at the center of a metallic ring. the ring has a radius of 10^-6 m and is
1. 1 answer
2. 561 views
1.52 kg box slides 1.24 m a long a level surface.the co-efficient of kinetic friction between book and surface is 0.140.find the
1. 1 answer
2. 372 views
find k if one of the lines given by kx^2+10xy+8y^2=0 is perpendicular to 2x-y=5
1. 2 answers
2. 1,785 views
the length of the median drawn to the hypotenuse of a right triangle is represented by 3x-7, while the hypotenuse is represented
1. 3 answers
2. 958 views
what are the seconds in 19.8 degrees
1. 1 answer
2. 293 views
In the book The Pearl By John Steinbeck. The rich and powerful usually dominate the poor and uneducated. In the book who was
1. 1 answer
2. 769 views
Am doing a experiement with a egg and trying to see if the shell dissolveshypothesis: If the solution is vinegar then the egg
1. 5 answers
2. 1,023 views
what are the rules to adding and subtracting negative numbers and positive numbers?
1. 1 answer
2. 551 views
what is Hemophilia? please explain thanks
1. 1 answer
2. 372 views
the sides of a quadrilateral abcd are 6cm,8cm,11cm and 12cm respectively,and the angle between the first two sides is a right
1. 4 answers
2. 855 views
How do I integrate tanx (1+sec^4 x)^3/2 dxMy daughter is doing surface area problems, and all the examples assume she knows how
1. 2 answers
2. 495 views

Answers (16)

7725
znco3+o2
i don't know the answer but how 4 the man height varies
Its physics
ok thanks got it
i need to do that experiment above is the hypothesis corrrect
14,500x09=1,305.oox05=6525 the answer is $6,525.00
$14,500 loan at 9% interest for 5 years is525.00
a.5.30
b.3,219
b.3,219
a.$5.30
a.$5.30
d.1.67%
whole 250.half 150
what is the call number of the oldest copy of ellison,s shadow and act?

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