A free electron is in an electric field. With respect to the field, it experiences a force acting:
a. perpendicular.
c. parallel.
b. along a constant potential line.
d. anti-parallel (opposite in direction).
D
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A pair of sound wave sources interfere destructively at a point that is 3?4 of the way from one speaker to the other. If the speed of sound is 343 m/s, and the sound waves are emitted at 880 Hz, which of the following is a possible distance between the two speakers?
A. 2.7 m B. 0.58 m C. 1.16 m D. 1.9 m E. 77 cm
Consider a situation where two moving objects collide, stick to each other, and move off together. The energy stored in a stretched spring is an example of gravitational potential energy
Indicate whether the statement is true or false
During a collision, which of these is an indication that the total momentum has changed?
A. Heat is generated, deformation occurs, and sound is produced B. Deformation occurs C. Sound is produced D. Heat is generated E. None of these choices are correct
Aristotle's idea of the cosmos was
a) that the world was flat and if you travelled too far you would fall of the edge b) Heliocentric was all planets traveling in ellipses about the sun c) Geocentric with 5 elements and celestial bodies are made of the lightest element called quintessence