A car is 200 m from a stop sign and traveling toward the sign at 40.0 m/s
At this time, the driver suddenly realizes that she must stop the car. If it takes 0.200 s for the driver to apply the brakes, what must be the magnitude of the constant acceleration of the car after the brakes are applied so that the car will come to rest at the stop sign?
A) 2.89 m/s2
B) 3.89 m/s2
C) 4.17 m/s2
D) 3.42 m/s2
E) 2.08 m/s2
C
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A double-slit interference experiment is performed in the air. Later, the same apparatus is immersed in benzene (which has an index of refraction of 1.50), and the experiment is repeated
When the apparatus is in benzene, you observe that the interference fringes are A) more widely spaced than when the apparatus is in air. B) equally spaced as when the apparatus is in air. C) more closely spaced than when the apparatus is in air.
The boundary between p-type material and n-type material in a diode is called the
a. anode. b. the cathode. c. the pn junction. d. the control grid.
What is the principal evidence that new plate material is continually being formed?
What will be an ideal response?
The critical angle for an air-glass interface is 42.6°. A light ray in air hits the interface, and the reflected ray is 100% polarized. What is the angle of refraction for that ray?
A) 47.4° B) 55.9° C) 24.3° D) 65.7° E) 34.1°