Physics, 24.01.2020 07:31, Prettygirlbuggy
An astronaut is in an all-metal chamber outside the space station when a solar storm results in the deposit of a large positive charge on the station. which statement is correct?
a. the astronaut must abandon the chamber immediately to avoid being electrocuted.
b. the astronaut will be safe only if she is wearing a spacesuit made of non-conducting materials.
c. the astronaut does not need to worry: the charge will remain on the outside surface.
d. the astronaut must abandon the chamber if the electric field on the outside surface becomes greater than the breakdown field of air.
e. the astronaut must abandon the chamber immediately because the electric field inside the chamber is non- uniform.
Answers: 1
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Adding more pulleys to a system of pulleys needed to lift an object. a. increases the force b. decreases the force c. increases the amount of work d. decreases the amount of work
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Which of the following is not a transverse wave? a) soundb) lightc) radiod) all of thesee) none of these
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Physics, 22.06.2019 18:00, RyannLambertt7141
Cells in the nervous system have a potential difference of 70 mv across the cell membrane separating the interior of the cell from the extracellular fluid. this potential difference is maintained by ion pumps that move charged ions across the membrane. is this an emf? select the correct answer and explanation. 1)no. the ion pumps cannot separate charges; thus, they cannot create a potential difference. 2)yes. the ion pumps cannot separate charges, but they still can create a potential difference. 3)yes. the ion pumps can actively separate charge; thus, they can create a potential difference. 4)no. the ion pumps can separate charges, but they cannot create a potential difference.
Answers: 1
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