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weqwewe [10]
2 years ago
9

Dave's sister gets very stressed out during final exam time; however, Dave isn't affected by the stress. What does this illustra

te?
A.
Fight or flight response

B.
Personal stress

C.
Relaxation response

D.
Subjective stress
Physics
1 answer:
dmitriy555 [2]2 years ago
6 0
The answer is b personal stress
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The ball is displaced to the left and then oscillates backwards and forwards between the two plates. The ball touches a plate on
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Answer:

Average current produced by the repeated transfer of charge is 5.6 × 10⁻⁷ ampere

Explanation:

The formula to be used here is

Q = It

where Q is the quantity of electricity and it is measured coulombs (C); 2.8 × 10⁻⁸ C or 0.000000028 C

I is current and it is measured in ampere (amps or A); unknown

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Since, average current is what is unknown

I =Q/t

I = 0.000000028/0.05

I = 5.6 × 10⁻⁷ A

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Two particles, each of mass m, are initially at rest very far apart.Obtain an expression for their relative speed of approach at
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Answer:

|\Delta v |=\sqrt{\frac{4Gm}{d} }

Explanation:

Consider two particles are initially at rest.

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the kinetic energy of the particles is zero.

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The final K.E. of the particles is

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Distance between two particles is d and the gravitational potential energy between them is given by

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By law of conservation of energy we have

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Now plugging the values we get

0+\frac{1}{2}\frac{m}{2}\Delta v^2= -\frac{Gmm}{d}

|\Delta v |=\sqrt{\frac{4Gm}{d} }

=\sqrt{\frac{Gm}{d} }

This the required relation between G,m and d

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