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UNO [17]
3 years ago
15

+

Physics
1 answer:
umka21 [38]3 years ago
6 0
Answer: figure A

Explanation:
Electric field lines point away from positive charges (like charges repel) and towards negative charges (unlike charges attract). ... Field lines do not touch or cross each other. Field lines are drawn perpendicular to a charge or charged surface. The greater the magnitude of the charge, the stronger its electric field.

Figure B shows a positive charge but has a negative field line so that’s wrong.

Figure C shows a negative charge but has a positive field line so that’s wrong.

Figure D shows a negative charge but has no perpendicular field lines so that’s wrong.
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Answer:

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An object is going 22 m/s and is 3 kg. find momentum
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Maksim231197 [3]

Answer:

Tt = 70 + 135e^-0.031t

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Explanation:

Given that :

Initial temperature, Ti = 205°

Temperature after 2.5 minutes = 195°

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Using the relation :

Tt = Ts + Ce^-kt

Temperature after time, t

When freshly poured, t = 0

205 = 70 + Ce^-0k

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T after 2.5 minutes to find proportionality constant, k

Tt = Ts + Ce^-kt

195 = 70 + 135e^-2.5k

125 = 135e^-2.5k

125 / 135 = e^-2.5k

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−0.076989 = - 2.5k

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Equation becomes :

Tt = 70 + 135e^-0.031t

t when Tt = 160

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0.6667 = e^-0.031t

In(0.6667) = - 0.031t

−0.405465 = - 0.031t

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Answer:

252 years

Explanation:

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