Consider a situation where you carry a 20-N box up a flight of stairs, raising its elevation by 5 m.The work you do is __________
Fill in the blank(s) with correct word
100 J
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It is harder to map the structure of the Milky Way as a whole in visible light than with any other form of electromagnetic radiation
Indicate whether the statement is true or false
An uncharged conductor has a hollow cavity inside of it. Within this cavity there is a charge of +10 µC that does not touch the conductor
There are no other charges in the vicinity. Which statement about this conductor is true? (There may be more than one correct choice.) A) The inner surface of the conductor carries a charge of -10 µC and its outer surface carries no excess charge. B) The inner and outer surfaces of the conductor each contain charges of -5 µC. C) The net electric field within the material of the conductor points away from the +10 µC charge. D) The outer surface of the conductor contains +10 µC of charge and the inner surface contains -10 µC. E) Both surfaces of the conductor carry no excess charge because the conductor is uncharged.
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) 776 mA B) 30.9 A C) 17.5 A D) 388 mA E) 61.8 A
Roughly what percentage of the mass-energy of in-falling matter can be converted to other forms of energy as the matter falls into a black hole?
A) 0.7% B) 1-4% C) 10-40% D) 100%