How does a sound wave travel in air?

1060

what is the name of the device that is made by combining two basic types of solid state rectifiers allowing the device to both rectify and amplify a current?

963

i measured a 3-ph capacitor with a multimeter which is not connected to supply... but i could get the phase to phase voltage... how tis is possible..????

1850

Explain heat treatment. Why and how is it done?

962

What is the difference between free electron theory and band theory of solids?

974

What is the shadows?

975

What are the characteristics of dead stars?

1070

Explain what is an alloy?

965

What happens to the velocity of sound with the rise of temperature?

955

explain the proper definition of light?

988

a bullet of mass m travelling at velocity v has a kinetic energy of ½mv2 when it strikes a ballistic pendulum of mass 1000 grams. The kinetic energy of the twomasses moving together just after the moment of impact is about a thousand times smaller than ½mv2. What has most of the bullets initial kinetic energy beenconverted to?

971

Does sunlight reflected off a mirror increase the temperature of the sun-rays?

1056

A car traveling at 30mph ( =13.4 m/s) & it slams on its brakes. ( The car is decelerated by the force of the friction 0.7..f *distance x. (Weight=mg) how far will the cargo before it stops?

865

Explain how much does automotive oil weigh?

937

Why have the electron and the proton the same charge whereas the proton is 1836 times heavier?

1155