Classify the following statement as a characteristic
(a) of electric forces only,
(b) of magnetic forces only,
(c) of both electric and magnetic forces, or
(d) of neither electric nor magnetic forces.
The force exerted on a negatively charged object is opposite in direction to the force on a positive charge.
1.electric forces
2.magnetic forces
3.both electric and magnetic forces
4.neither electric nor magnetic forces
3
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The pressure exerted by a gas is the result of
a. the Bernoulli effect b. molecular collisions c. Pascal's principle d. the ideal gas law e. none of the above
What type of lens is used in a pinhole camera?
A. Converging B. Diverging C. Spherical D. No lens is used
A ball falls from the top of a building, through the air (air friction is present), to the ground below. How does the kinetic energy (K) just before striking the ground compare to the potential energy (U) at the top of the building?
A) K is equal to U. B) K is greater than U. C) K is less than U. D) It is impossible to tell.
According to the Weinberg-Salam model, the massless carriers of the electroweak interaction acquire mass in the process of ______________
Fill in the blank(s) with correct word