Calculate the current through a 10.0-m long 22 gauge (having radius 0.321 mm) nichrome wire if it is connected to a 12.0-V battery. The resistivity of nichrome is 100 × 10-8 ? ? m
A) 17.5 A
B) 30.9 A
C) 61.8 A
D) 388 mA
E) 776 mA
D
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Liquid mercury is contained in a lead beaker as shown in Figure 1-14. Estimate the amount of mercury that migrates by diffusion into the beaker after 48 hours if the concentration of mercury is 2% at a distance 0.01 cm into the beaker wall from the inside surface. Assume that the system is at 20ºC and neglect evaporation to air.
A rocket is moving at 1/4 the speed of light relative to Earth. At the center of this rocket, a light suddenly flashes. To an observer at rest in the rocket,
A) the light will reach the front of the rocket at the same instant that it reaches the back of the rocket. B) the light will reach the front of the rocket before it reaches the back of the rocket. C) the light will reach the front of the rocket after it reaches the back of the rocket.
A box is placed on a table which rests on the floor. The box pushes on the table; the Newton's third law pair to the the box's push on the table is the table's push on the floor
A) True B) False
The central core inside an atom is the neutron
Indicate whether the statement is true or false