Two protons, each of charge 1.60 × 10^-19 C, are 3.00 × 10^-5 m apart. What is the change in potential energy if they are brought 1.00 × 10^-5 m closer together? (ke = 8.99 × 10^9 N•m2/C2)
a. 3.84 × 10^-24 J
c. 1.15 × 10^-23 J
b. 3.20 × 10^-16 J
d. 3.20 × 10^-19 J
A
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Two moles of an ideal gas are placed in a container of adjustable volume. When measurements are made
a. the pressure is inversely proportional to the volume at constant temperature. b. the temperature is directly proportional to the volume at constant pressure. c. the temperature is directly proportional to the pressure at constant volume. d. all the statements above are found to be correct. e. only statements (a) and (b) are found to be correct.
The Earth's layer with plastic-like behavior is the
A) mantle. B) crust. C) inner core. D) outer core.
What is the acceleration of a rock thrown straight upward on the way up? At the top of its flight? On the way down?
A. The acceleration of the rock thrown upward has the same value of 7.2 m/s-sq downwards at all three points of the rock on way up, stationary at the top of its flight and on way down. The magnitude and direction of the velocity of the rock will not change but the acceleration will remain different in magnitude and direction. B. The acceleration of the rock thrown upward has the same value of - 9.8 m/s2 downwards at all three points of the rock on way up, stationary at the top of its flight and on way down. The magnitude and direction of the velocity of the rock will be changing but the acceleration will remain the same in magnitude and direction throughout its trip. C. The acceleration of the rock thrown downwards has the same value of 5 m/s-sq downwards at all three points of the rock on way up, stationary at the top of its flight and on way down. The magnitude and direction of the velocity of the rock will be changing but the acceleration will remain the same in magnitude and direction throughout its trip.
A charged particle is moving perpendicular to a uniform magnetic field, the radius of its motion given by r = mv/Bq. The speed of the particle is tripled. The particle’s time to complete one loop
1.is divided by three. 2.triples. 3.stays the same. 4.changes in ways which cannot be determined with the information given.