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Annette [7]
4 years ago
14

A bullet moving horizontally with a velocity of 40.0 m/s strikes a sandbag and penetrates a distance of 20.0 cm before coming to

rest. what is the acceleration of the bullet in m/s?
Physics
1 answer:
wlad13 [49]4 years ago
3 0

Answer:

-4000 m/s²

Explanation:

Given:

Δx = 0.200 m

v₀ = 40.0 m/s

v = 0 m/s

Find: a

v² = v₀² + 2aΔx

(0 m/s)² = (40.0 m/s)² + 2a (0.200 m)

a = -4000 m/s²

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an empty boat floats in water with 10% of its volume submerged. and when it is loaded with 1200kg , the volume submerged will in
Lostsunrise [7]

Let volume of empty boat be = 100% = 1V

and mass of boat be M

In water 10%, 0.1V of the volume is submerged.

Mass, m of 1200kg increases the submerging from 10%, 0.1V to 70%, 0.7V

M leads to 0.1V boat submerging

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M + 1200kg leads to 0.7V boat submerging.

This is 60%, 0.6 V increase

By comparison

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0.1M + 120kg = 0.7M

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2 years ago
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3 0
4 years ago
When air pressure decreases, the mercury in a barometer _____.
siniylev [52]

Answer:

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7 0
3 years ago
Two infinite parallel surfaces carry uniform charge densities of 0.20 nC/m2 and -0.60 nC/m2. What is the magnitude of the electr
svlad2 [7]

Answer:

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Explanation:

It is given that,

Surface charge density of first surface, \sigma_1=0.2\ nC/m^2=0.2\times 10^{-9}\ C/m^2

Surface charge density of second surface, \sigma=-0.6\ nC/m^2=-0.6\times 10^{-9}\ C/m^2

The electric field at a point between the two surfaces is given by :

E=\dfrac{\sigma}{2\epsilon_o}

E=\dfrac{\sigma1-\sigma_2}{2\epsilon_o}

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