A) suggest why the pipes are made of Copper b) suggest why the pipes and the metal backing sheet are painted black
c) Suggest why an insulating material is attached to the metal backing sheet
d) Suggest why the presence of the glass sheet increases the energy collected by the water

Astone dropped into a well is heard to strike the water after 8seconds. find the depth of the well if the velocity of sound is 350m/s

Estimate the kinetic energy of the neptune with respect to the sun as the sum of the terms, that due to its daily rotation about its axis, and that due to its yearly revolution about the sun. [assume the neptune is a uniform sphere with mass = 1.0×1026 kg , radius = 2.5×1010 m , rotation period 16.1 h , orbital period 6.01×104 d and is 4.6×109 km from the sun.]

10 application of ultra sound waves?