Heat a copper wire and its electrical resistance
A) decreases.
B) remains unchanged.
C) increases.
Answer: C
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Electrostatic discharge that usually occurs during a thunderstorm
A. Waterspout |
B. Tropical Cyclones |
C. Tornado |
D. Lightning |
E. Great Red Spot |
F. Dust Devil |
An object is thrown upwards with a speed of 14 m/s. How high above the projection point is it after 0.50 s?
A) 0 m B) 2.9 m C) 5.8 m D) 7.0 m E) 8.2 m
Outside the frost line, planetesimals could form more quickly due to the presence of both rock and ice
Indicate whether the statement is true or false
How can a nucleus be described by particular values of A, Z and N when the mass of the nucleus is not equal to Zmp + Nmn, where mp and mn are the masses of free protons and neutrons?
a. A, Z and N have no intrinsic meaning. b. A, Z and N describe the number of particles of given types, but mass has no meaning when part of the mass is elsewhere in the universe. c. A, Z and N describe the number of particles an ideal rather than a real nucleus would have. d. A, Z and N describe the number of particles of given types in the nucleus, but not their masses in a bound state. e. A, Z and N describe the number of particles of given types in the nucleus since the missing mass consists of electrons that are also present in the nucleus.