A proton is maintained at rest in the middle of a box that has no matter inside it other than the single proton
Assuming that the box is isolated from all external influences, which of the following would we expect to find at some other point X inside the box?
A) an electric field
B) a magnetic field
C) Both of the above.
D) an electric force
E) All of the above.
A
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Which of the following best describes the image of a convex mirror when the object's distance from the mirror is less than the absolute value of the focal point distance?
a. virtual, upright and magnification greater than one b. real, inverted and magnification less than one c. virtual, upright and magnification less than one d. real, inverted and magnification greater than one
The angular sizes of the Sun and Moon are about the same because
A) both objects have the same physical size. B) both objects are located the same distance away. C) the Sun is larger in size than the Moon by the same factor (about 400) that it is farther in distance. D) their angular sizes are an illusion created by the apparent locations on the celestial sphere.
How many grams of ice at -13°C must be added to 711 grams of water that is initially at a temperature of to produce water at a final temperature of
Assume that no heat is lost to the surroundings and that the container has negligible mass. The specific heat of liquid water is 4190 J/kg ? °C and of ice is 2050 J/kg · °C. For water the normal melting point is 0.00°C and the heat of fusion is 334 × 103 J/kg. The normal boiling point is 100°C and the heat of vaporization is 2.26 × 106 J/kg. What will be an ideal response?
I the inductance and the capacitance both double in an LRC series circuit, the resonate frequency of that circuit will
A. decrease by a factor of 1?2. B. decrease by a factor of 1/4. C. increase by a factor of 2. D. increase by a factor of 4.