<span>I didn't do the circuit construction simulation experiment, and
I don't have any course notes. Both of those were YOUR job.
But I'm still going to take your points. I'll try to answer the question
based on what I know, and you'll just have to decide whether you
trust me, even though I never had any contact with your class or
anything that happened there.
I believe that when two resistors are connected in series,
there is less total current in the circuit than if the two resistors
were connected in parallel. That's the first choice.</span>
Answer:
Velocity has a direction associated with it, while speed has no specific direction.
Explanation:
Velocity is a vector, while speed is a scalar.
Answer:
A. Heat flows from an object at higher temperature to an object at lower temperature
Explanation:
The option A obeys the 2nd law of thermodynamics. The heat will flow from the object at higher temperature to the object at Lower temperature till they reach an equilibrial state.
Heat doesn’t necessarily flow from an object with higher thermal energy to an object with lower thermal energy because an object has a higher thermal energy when it’s mass is more than the other. This makes B wrong.
C is wrong because heat moves from an object with higher temperature to objects with Lower temperature regardless of the state of matter.
Answer:
Approximately 0.979 J.
Explanation:
Assume that the two charges are in vacuum. Apply the coulomb's law to find their initial and final electrical potential energy 
.
,
where
- The coulomb's constant
, 
and 
are the sizes of the two charges, and
is the separation of (the center of) the two charges.
Note that there's no negative sign before the fraction.
Make sure that all values are in SI units:
;
;
- Initial separation:
; - Final separation:
.
Apply Coulomb's law:
Initial potential energy:
.
Final potential energy:
.
The final potential energy is less negative than the initial one. In other words, the two particles gain energy in this process. The energy difference (final minus initial) will be equal to the work required to move them at a constant speed.
.
