If you wish to spear a fish with a regular spear, you should compensate for refraction and throw your spear
A) directly at the sighted fish.
B) above the sighted fish.
C) below the sighted fish.
Answer: C
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A 3.0-kg block moves up a 40° incline with constant speed under the action of a 26-N force acting up and parallel to the incline. What magnitude force must act up and parallel to the incline for the block to move down the incline at constant velocity?
a. 14 N b. 12 N c. 16 N d. 18 N e. 25 N
The second law of thermodynamics states that
A) energy cannot be created or destroyed B) matter cannot be crated or destroyed C) the energy in a system undergoes changes that lead to increasing disorder D) the energy in a system undergoes changes that lead to increasing complexity
Combining two sounds of equal intensity will give a sound level __________ higher than the sound level due to just one of them
Fill in the blank(s) with correct word
Four 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). Rank the wave functions in order of the magnitude of the frequencies of the waves, 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