Light of wavelength 519 nm passes through two slits. In the interference pattern on a screen 4.6 m away, adjacent bright fringes are separated by 5.2 mm in the general vicinity of the center of the pattern
What is the separation of the two slits?
0.46 mm
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In what sense is the cosmic microwave background evidence for the Big Bang?
A) because Einstein predicted that the universe should be expanding B) because this radiation would have been necessary to cause the Big Bang C) because explosions are always associated with dangerous levels of radiation D) because it was predicted to exist if the Big Bang really occurred
A carousel that is 5.00 m in radius has a pair of 600-Hz sirens mounted on posts at opposite ends of a diameter
The carousel rotates with an angular velocity of 0.800 rad/s. A stationary listener is located at a distance from the carousel. The speed of sound is 350 m/s. The maximum beat frequency of the sirens at the position of the listener is closest to A) 6 Hz. B) 8 Hz. C) 10 Hz. D) 12 Hz. E) 14 Hz.
A car travels along east and its velocity decreases. The acceleration of the car is in which of the following directions?
A) Eastward B) Westward C) Northward D) Southward E) Cannot be determined without additional information.
A bubble having a diameter of 1.00 cm is released from the bottom of a swimming pool where the depth is 5.00 m. What will the diameter of the bubble be when it reaches the surface? The temperature of the water at the surface is 20.0°C, whereas it is 15.0°C at the bottom. (The density of water is 1.00 × 10^3 kg/m3.)
a. 1.05 cm b. 1.15 cm c. 1.45 cm d. 1.65 cm e. 1.35 cm