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

929

---

How many femtometers are in a nanometer?

960

---

What is the cause of brownian motion?

994

---

Does gas have density?

887

---

What is the difference between dynamic strain aging and strain aging?

912

---

Why does sun appear flat during sunrise and sunset?

896

---

What is larger the force the earth exerts on you or the force you exert on the earth?

865

---

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?

921

---

What is different between secondary electron image and back scattered electron image?

918

---

In the 19th century, this scottish scientist showed that all magnetic and all electric phenomena could be described by four equations that often bear his name. What ishis name?

980

---

What seven colors appear to be white when mixed together?

867

---

This perceived force, that seems to want to throw a person off a merry-go-round, is often regarded by physicists as a fictitious force:

924

---

When thomas edison was promoting the wide use of direct current, this personal enemy of edisons was the chief proponent and expert in alternating current?

904

---

Difference between intrinsic and extrinsic semiconductors?

952

---

Physicists most commonly call a mass moving in a straight line path as having:

918

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