<span>an atom is described as having a negatively charged electron cloud surrounding a positively charged nucleus, which is the correct choice.</span><span>
The nucleus contains electrically neutral neutrons and positively charged protons, establishing its positive charge. In contrast, electrons carry a negative charge. The electromagnetic force keeps the atoms bound to the nucleus.
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Response:
The resistivity can be expressed as 
Clarification:
According to the information provided,
The value of the electric field measures 
The density of current is given as 
Typically, resistivity is represented in mathematical terms as

by inserting values


Answer:
Explanation:
As the baseball ascends, gravitational forces as well as air resistance act downward, whereas the displacement is moving upward which results in an angle of 180° between the force and displacement. Therefore, the work done by both the gravitational force and air resistance is negative, confirming option (d) as accurate.
When the boat submerges completely in the pond, the water level of the pond rises.