Sunday
May 19, 2013

# Posts by Alan

Total # Posts: 278

Mathematics
thank you

Mathematics
Hi, Can someone check this for me .. please A tuning fork has a wavelength 0f 136 centimetres. Given that the speed of sound is 340 metres per second what is the frequency of the tuning fork ?? Frequency = speed / wavelength Then 340 / 1.36m (136cm) = 250 Hz Thank you try to h...

math
2/27(x-3)√((x^2-6x+23)/y)rearrange the equation to make y the subject

algebra
collect all like terms 3x^2-5x^2+12y-3y+8x =-2x^2+9y+8x

Alegbra 1
the answer is distance over time. total distance is 1500 miles total time is 3.5 hours. 1500/3.5=428.57 mph.

maths
(a)(i)use the composite rule to differentiate the function f(x)=(x^2-6x+23)^(3/2). (ii)use the composite rule and your answer to part (a)(i) to show that the function g(x)=(x-2)/(x^2-6x+23)^(3/2) has derivative g'(x)=(5+9x-2x^2)/(x^2-6x+23)^(5/2). (iii)find any staionary p...

physics
An inflated basketball has a gauge pressure of 9.0 lb/in^2. What is the actual pressure inside the ball?

physics
A 70 kg person sits on a 3.6 kg chair. Each leg of the chair makes contact with the floor in a circle that is 1.5 cm in diameter. Find the pressure exerted on the floor by each leg of the chair, assuming the weight is evenly distributed.

calculus
An airplane at a height of 2000 meters is flying horizontally, directly toward an observer on the ground, with a speed of 300 meters per second. How fast is the angle of elevation of the plane changing when this angle is 45 degrees?

Physics
Pushing on the pump of a soap dispenser compresses a small spring. When the spring is compressed 0.55 cm, its potential energy is 0.0035 J. What is the force constant of the spring? What compression is required for the spring potential energy to equal 0.0094 ?

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