What is the present scientific status of Newtonian physics?
A) Newtonian physics is now known to be wrong and thus it is no longer useful in science.
B) Although we cannot know for certain that Newtonian physics is correct, no violations have ever been discovered.
C) We now know that Newtonian physics is correct.
D) Newtonian physics does not apply to very small objects, high-speed objects, and very strong gravitational forces.
E) Newtonian physics does not apply to very small objects, but otherwise no violations have been discovered.
D
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Under what conditions is an object weightless? (Ignore effects of air resistance.)
A) when it is in free-fall B) when it is on the Moon C) when it is detached from Earth's surface (such as in an airplane) D) when it is moving in at constant velocity
Plane A is flying at 600 mph in the northeast direction relative to the Earth. Plane B is flying at 500 mph in the north direction relative to the Earth. What is the speed of Plane B as observed from Plane A?
a. 900 mph c. 357 mph b. 431 mph d. 100 mph
Above is an image of a supergranule
a. True
b. False
A parallel-plate capacitor has plates of area 0.80 m2 separated by a distance of 3.0 mm. What is this capacitor's capacitance?
A) 270 F B) 70 F C) 2.4 × 10-9 F D) 4.8 × 10-10 F E) 3.6 × 10-10 F