Recent content by Pseudopro

I've solved it - thank you for your time :)

Homework Statement Air of density 1.2kgm-3, speed 8ms-1 is incident on blades of wind turbine. Radius of blades 1.5m. After passing blades, wind speed is reduced to 3.0ms-1 and density 1.8kgm-3. How much power is extracted from wind?Homework Equations P=1/2 pAv3The Attempt at a Solution P=1/2 x...

It's alright - I've already worked it out.

Homework Statement A glass tube with one end open and the other closed is used in a resonance experiment to determine the speed of sound. A tuning fork of frequency 427 Hz is used and resonance is observed for air column lengths equal to 17.4 cm and 55.0 cm. (a) What speed of sound does this...

thanks for the confirmation :)

Thanks, that example makes it clear

Homework Statement Piston mass: 0.25kg Stroke (distance between extreme positions): 9cm 4500rev min-1 (a)Calculate acceleration of piston at maximum displacement (b)Calculate velocity as piston moves past its equilibrium point (c)What is the net force exerted on the piston at maximum...

Could someone correct me if I'm wrong?

Um... is this the important bit?... The high temperature of the flame causes the vaporized fuel molecules to decompose, forming various incomplete combustion products and free radicals

A flame's just energy right? Does it have a state?

Homework Statement Two plastic spheres each of mass 100.0 mg are suspended from very fine insulating strings of length 85 cm. When equal charges are placed on the spheres, the spheres repel and are in equilibrium when 10 cm apart. (a) What is the charge on each sphere? Homework Equations...

Homework Statement When a flame is brought near a charged electroscope, the foil collapses. How is this explained? Homework Equations None The Attempt at a Solution Electrons are excited and given energy so distribute equally on the foil. Probably wrong. Please give correct...

Thanks gneill. When both heat transfers stop, will the lower shc setup have a higher temperature?

Homework Statement This is a problem I made myself and it's really confusing me. You have 100mL of water and place it in a calorimeter of low specific heat capacity. You put another 100mL of water in another calorimeter of high specific heat capacity. Assume in both instances that the water is...

Thanks a lot for your guidance. :smile: I've got it now :approve: