The most characteristic feature of science is
A) its precise quantitative observations.
B) its precise mathematical relations.
C) Both of the above.
D) the fact that scientific laws are absolutely true, i.e., that they have no exceptions.
E) the mutually-supporting relationship between theory and observation.
E
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Peak values for a neodymium-glass laser are 1200 J for 1 nanosecond. If the cross section of the laser beam is 1 cm2, what are the maximum values of E and B? (µ0 = 4p × 10^-7 T×m/A, c = 3.00 × 10^8 m/s)
a. 3 × 10^7 V/m, 2 T c. 1 × 10^10 V/m, 3 T b. 2 × 10^8 V/m, 10 T d. 3 × 10^9 V/m, 10 T
A 1200 kg car is traveling at 4.00 m/s and strikes a wall. The 1200 kg car bounces off the wall with a velocity of 4.00 m/s. If the contact with the wall by the car lasts for 0.100 seconds, then the impulse on the car is
A. 12,400 kg m/s. B. 10,200 kg m/s. C. 9,600 kg m/s. D. 8,400 kg m/s. E. 2,900 kg m/s.
Two point charges of + 30.0 ?C and - 9.00 ?C are separated by a distance of 20.0 cm. A +7.00 ?C charge is placed midway between these two charges. What is the electric force acting on this charge because of the other two charges?
A) 0.453 N directed towards the negative charge B) 2.45 N directed towards the negative charge C) 2.45 N directed towards the positive charge D) 245 N directed towards the positive charge E) 245 N directed towards the negative charge
The Japanese word tsunami means "______________ wave."
Fill in the blank(s) with correct word