Light from the sun is illuminating a fish in the water. The sun is at 45° relative to a perpendicular to the water surface. What is the angle of the suns rays in the water relative to a perpendicular to the water surface?
What will be an ideal response?
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Just as "gravity" is the study of a wide range of gravitational interactions, "electricity" is the study of a wide range of
A) electrical charges. B) electrical forces. C) electrical interactions. D) none of the above
When a negative charge is released and moves along an electric field line, it moves to a position of
A. lower potential and lower potential energy. B. lower potential and higher potential energy. C. higher potential and lower potential energy. D. higher potential and higher potential energy. E. decreasing magnitude of the electric field.
An aluminum wire 2.0 m long and 2.0 mm in diameter supports a 10.0-kg fixture. What is the stress in the wire? Young's modulus for aluminum is 7.0 × 1010 N/m2
A) 9.3 × 107 N/m2 B) 3.1 × 107 N/m2 C) 6.2 × 107 N/m2 D) 1.2 × 108 N/m2
A water hose has a flow rate of 3.0 kg/s of water. If the velocity of the water as it leaves the hose is 5.0 m/s, then the force to hold the hose is
A. 15 N. B. 26 N. C. 30 N. D. 45 N. E. 57 N.