In fair weather, the electric field in the air at a particular location immediately above the
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Physics, 01.06.2020 01:57, elijahbebeastin
In fair weather, the electric field in the air at a particular location immediately above the
Earth’s surface is 120 N/C directed downward. (a) What is the surface charge density on
the ground? Is it positive or negative? (b) Imagine the surface charge density is uniform
over the planet. What then is the charge of the whole surface of the Earth? (c) What is the
Earth’s electric potential due to this charge? (d) What is the difference in potential between
the head and the feet of a person 1.75 m tall? (Ignore any charges in the atmosphere.)
(e) Imagine the Moon, with 27.3% of the radius of the Earth, had a charge 27.3% as large,
with the same sign. Find the electric force the Earth would then exert on the Moon.
(f) State how the answer to part (e) compares with the gravitational force the Earth exerts
on the Moon.
Answers: 2
Physics, 22.06.2019 02:00, LuluMathLover101
Free runners jump long distances and land on the ground or a wall. how do they apply newton’s second law to lessen the force of impact?
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Physics, 22.06.2019 19:50, carlinryan
An electron moves with a constant horizontal velocity of 3.0 × 106 m/s and no initial vertical velocity as it enters a deflector inside a tv tube. the electron strikes the screen after traveling 26 cm horizontally and 19 cm vertically upward with no horizontal acceleration. what is the constant vertical acceleration provided by the deflector? (the effects of gravity can be ignored.)
Answers: 2
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