The first law of thermodynamics states that the increase in internal energy of a system is equal to
A. the amount of heat added to the system amount of work done on the system minus the
B. the amount of heat added to the system amount of work done on the system plus the
C. the amount of heat added to the system amount of work done by the system minus the
D. the amount of heat added to the system amount of work done on the system minus the
C. the amount of heat added to the system minus the amount of work done by the system
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A metal bar is 20 cm long and has a rectangular cross-section measuring 1.0 cm × 2.0 cm. What is the voltage drop along its length when it carries a 4000-A current? The resistivity of the metal is 1.68 × 10-8 ? ? m
A) 0.067 V B) 0.67 V C) 0.034 V D) 0.34 V
Projectile Motion: A hunter points a rifle horizontally and holds it 3.30 m above the ground. The bullet leaves the barrel at 325 m/s and experiences no significant air resistance. The acceleration due to gravity at this location is 9.80 m/s2.(a) How long does it take for the bullet to strike the ground?(b) How far horizontally does it travel?
What will be an ideal response?
If a material cannot transfer charge along its length, the material is:
a. a metal. b. a conductor. c. an insulator. d. self-contained. e. a magnet.
The interval used to specify the sequence of animated GIFs is frames-per-minute.
Answer the following statement true (T) or false (F)