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lisabon 2012 [21]

2 years ago

9

Four students are each pushing on one side of a box. Mara is pushing to the west, Cindi is pushing to the east, Chris is pushing

to the north, and Sammy is pushing to the south. If the box moves to the east, which student does work on the box?

1 answer:

jenyasd209 [6]2 years ago

5 0

Answer:

cindi

Explanation:

cindi's work done is larger than all the other students combined

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natka813 [3]

Answer:

Explanation:

V₀ = 0 m/s

V = 41 m/s

S = 480 m

___________

a - ?

Distance traveled:

S = (V² - V₀²) / (2*a)

Acceleration :

a = (V² - V₀²) / (2*S)

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Consider a collection of charges in a given region and suppose all other charges are distant and have a negligible effect. Furth

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Answer:

E. Some charges in the region are positive, and some are negative.

Explanation:

Electric potential is given as;

$V = \frac{W}{Q}$

where;

W is the work done in moving a charge between two points which have a difference in potential

Q is quantity of charge in the given region

If the electric potential at a given point in the region is zero, then sum of the charges in the given region must be equal to zero. For the charges to sum to zero, some will be positive while some will be negative,.

Therefore, the correct statement in the given options is "E"

E. Some charges in the region are positive, and some are negative.

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Answer:

Explanation:

Given

diameter $d=20 \mu m$

density $\rho =1300 kg/m^3$

frequency $\nu =150 Hz$

Length of silk strand $L=14 cm$

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$\nu =\sqrt{\frac{T}{\mu }}$

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$f=\frac{\nu }{2l}$

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