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tensa zangetsu [6.8K]
3 years ago
15

How to make a force field for your house

Physics
1 answer:
Lelu [443]3 years ago
6 0
That is not yet possible. that technology has not yet been invented.
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A bullet is accelerated down the barrel of a gun by hot gases produced in the combustion of gun powder. What is the average forc
elena-14-01-66 [18.8K]

Answer:4.259 kN

Explanation:

Given

mass of bullet m=0.02 kg

final velocity of bullet v=575 m/s

time taken =2.7 ms\approx 2.7\times 10^{-3} s

We know

Impulse=F_{avg}\cdot t=change\ in\ momentum

thus

Initial Momentum(P_i)=m\times 0

Final Momentum(P_f)=m\times v=0.02\times 575

P_f=11.5 kg-m/s

F_{avg}\times 2.7\times 10^{-3}=P_f-P_i=11.5

F_{avg}=4.259\times 10^3

F_{avg}=4.259 kN

7 0
3 years ago
When energy decreases, particle motion:<br> A. stops<br> B. increases<br> C. decreases
DaniilM [7]
C. decreases here you go
7 0
4 years ago
Read 2 more answers
Two parallel wires carry currents in the opposite direction. If wire 1 has a current of i, while wire 2 has a current of 2 i, wh
deff fn [24]

If two parallel wires carry current in opposite directions, they repel each other whereas if two parallel wires carry current in same direction, they attract each other.

force of the wire2 will be more compared to that of wire1.

According to force formula, wire2 will generate more force compared to wire1

force=magnetic flux density × current × length

here,

current is directly proportional to the force, so with increase in current the force will also increase.

force depends on the length and current of the wire.

So, from this we can conclude that wire 2 will produce more force compared to wire 1.

To learn more about the force

brainly.com/question/16452786

#SPJ4

5 0
2 years ago
Car enthusiasts often lower their cars closer to the ground as a matter of style. James wants to lower his car by replacing all
Alexandra [31]

Answer:

\Delta h=0.0364\ m=3.64\ cm

Explanation:

Given:

  • change in stiffness constant of the spring on replacing the original springs, \delta k=5355\ N.m^{-1}
  • mass of the car, m=1455\ kg
  • initial length of the original car-spring before compression, l_i=12\ cm=0.12\ m
  • final length of the original car-spring after compression, l_f=8.55\ cm=0.0855\ m

So, weight of the car:

w=m.g

w=1455\times 9.81

w=14273.55\ N

<u>Now the spring constant of original spring:</u>

w=4k_o.(l_i-l_f) (since 4 springs are in parallel)

14273.55=4k_o\times (0.12-0.0855)

k_o=103431.522\ N.m^{-1}

<u>So the stiffness constant of the new springs:</u>

k_n=k_o-\delta k

k_n=103431.522-5355

k_n=98076.522\ N.m^{-1}

<u>Now the height lowered:</u>

w=k_n.4\Delta h (since 4 springs are in parallel)

14273.55=4\times98076.522\times \Delta h

\Delta h=0.0364\ m=3.64\ cm

5 0
4 years ago
How much kinetic energy does a 7.2-kg dog need to make a vertical jump of 1.2 m? (The acceleration due to gravity is 9.8 m/s2.)
V125BC [204]
<span>How much kinetic energy does a 7.2-kg dog need to make a vertical jump of 1.2 m?
</span>Answer:

85 Joule (approx)

Explanation:

Potential energy at highest point

<span><span>P.E = mgh = 7.2 kg × 9.8 m/s2</span>×1.2 m≈85 Joule</span>

This is the kinetic energy required for dog to jump a height of 1.2 m.



hope this helps!

7 0
3 years ago
Read 2 more answers
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