When light travels from air into water,
A) its velocity, wavelength and frequency all change.
B) its velocity changes, but its frequency and wavelength do not change.
C) its frequency changes, but its velocity and wavelength do not change.
D) its velocity and wavelength change, but its frequency does not change.
E) its wavelength changes, but its velocity and frequency do not change.
D
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The total energy released during a neutron star merger can be even greater than that of a massive star supernova
Indicate whether the statement is true or false
A particle (mass = 6.7 × 10?27 kg, charge = 3.2 × 10?19 C) moves along the positive x axis with a speed of 4.8 × 105 m/s. It enters a region of uniform electric field parallel to its motion and comes to rest after moving 2.0 m into the field. What is the magnitude of the electric field?
A. 2.0 kN/C B. 1.5 kN/C C. 1.2 kN/C D. 3.5 kN/C E. 2.4 kN/C
Exhibit 17-3Four wave functions are given below. I.y(x, t) = 5sin(4x- 20t + 4) II.y(x, t) = 5sin(3x- 12t + 5) III.y(x, t) = 5cos(4x + 24t + 6) IV.y(x, t) = 14cos(2x- 8t + 3)Use this exhibit to answer the following question(s). Refer to Exhibit 17-3. Rank the wave functions in order of the magnitude of the wave speeds, from least to greatest.
A. IV, II, I, III B. IV = II, I, III C. III, I, II, IV D. IV, I, II, III E. III, IV, II, I
When a crate slides down an incline at a constant velocity it is
A) in dynamic equilibrium. B) not in dynamic equilibrium. C) in a state of being in and out of dynamic equilibrium. D) none of the above