A light ray bends when it goes from one medium to another because of diffraction
Indicate whether the statement is true or false
F
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What is the minimum x-ray wavelength produced when electrons are accelerated through a potential of 46,800 V? (h = 6.63 × 10^?34 J?s, c = 3.00 × 10^8 m/s, and 1 eV = 1.60 × 10^?19 J)
a. 4.25E–11 m b. 8.85E–12 m c. 4.01E–12 m d. 2.66E–11 m e. 6.80E–11 m
A 3.0-kg mass is dropped from the edge of a 50-m tall building with an initial speed of zero. The mass strikes the ground with a downward velocity of 25 m/s. Find the change in mechanical energy of the mass caused by air resistance between the point where it is dropped and the point where it strikes the ground
a. ?0.46 kJ b. ?0.53 kJ c. ?0.61 kJ d. ?0.38 kJ e. ?0.81 kJ
Determine the change in entropy (in J/K) when 5.00 moles of an ideal gas at 0°C are compressed isothermally from an initial volume of 100 cm3 to a final volume of 20 cm3
a. -191 b. -52 c. -71 d. -67 e. -208
An earthquake emits both S-waves and P-waves which travel at different speeds through the Earth. A P-wave travels at 9 000 m/s and an S-wave travels at 5 000 m/s. If P-waves are received at a seismic station 1.00 minute before an S-wave arrives, how far away is the earthquake center?
a. 88.9 km b. 1 200 km c. 675 km d. 240 km e. 480 km