Wednesday, July 25, 2012

physics


Which of the following is the correct expression of Bernoulli's principle?



*A. As KE increases, another form of energy must decrease. 

B. As KE increases, other forms of energy also increase.

C. KE remains relatively stable in a closed loop.

D. KE has a limited effect upon wavelength.



 Which of the following is the correct expression for work? 



*A. W = ▲KE 

B. W = K - ▲E 

C. W = K x ▲E 

D. W = ▲K / ▲E 



 A spring has a spring constant of 120 newtons per meter. How much potential energy is stored in the spring as it is stretched .20 meter? 



A. 1.2 J

*B. 2.4 J 

C. 3.1 J 

D. 7.4 J

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