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Crank
2 years ago
5

A bomb, initially at rest, explodes into several pieces.(b) Is kinetic energy of the system conserved? Explain.

Physics
1 answer:
postnew [5]2 years ago
7 0

The kinetic energy is not conserved because the chemical potential energy initially present in the explosive is converted into kinetic energy of the pieces of the bomb

<h3>What is kinetic energy?</h3>
  • Kinetic energy is the term used in physics to describe the energy an object has as a result of motion. The effort needed to move a mass-determined body from rest to the stated velocity is how it is defined.
  • The body holds onto the kinetic energy it acquired during its acceleration until its speed changes.
  • The body exerts the same amount of effort when slowing down from its current pace to a condition of rest.
  • Formally, a kinetic energy is any term that includes a derivative with respect to time in the Lagrangian of a system.
  • This is a fair approximation in relativistic mechanics only when v is considerably slower than the speed of light.

To know more about kinetic energy, refer:

brainly.com/question/114210

#SPJ4

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A hydraulic lift raises a 4000 kg automobile when a 500N force is applied to the smaller piston. If the smaller piston has an ar
MariettaO [177]

Answer:

The cross-sectional area of the larger piston is 800 cm².

Explanation:

Given;

mass of the automobile, m = 4000 kg

force applied on the small piston, F₁ = 500 N

area of the smaller piston, A₁ = 10 cm²

load lifted by the larger piston, F₂ = 4000 x 10 = 40,000 N

Pressure experienced by each piston is given as;

\frac{F_1}{A_1} = \frac{F_2}{A_2}

Where;

A₂ is the cross-sectional area of the larger piston

\frac{F_1}{A_1} = \frac{F_2}{A_2} \\\\A_2 = \frac{F_2A_1}{F_1} \\\\A_2 = \frac{40,000 \ \times\ 10}{500} \\\\A_2=800 \ cm^2

Therefore, the cross-sectional area of the larger piston is 800 cm².

8 0
3 years ago
While rowing in a race, John does 132 J of work while pulling the oar 0.800 m.
HACTEHA [7]

Answer:

i got u!!! john's arms exert a force of 165 newtons.

6 0
3 years ago
Read 2 more answers
Q: The picture above shows a frying pan. Why are frying pans usually made out of metal? 
Natasha_Volkova [10]
A. Because metal is a good conductor of heat.

If a frying pan wasn't a good conductor of heat it's purpose of cooking things wouldn't really be resolved. Without heat it couldn't cook well. I think lol that's my way of thinking.



Hope I helped :)
4 0
3 years ago
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A man, a distance d=3~\text{m}d=3 m from a target, throws a ball at an angle \theta= 70^\circθ=70 ​∘ ​​ above the horizontal. If
lbvjy [14]

Answer:

The ball doesn't strike the building because it strikes the ground at d=1.62 meters.

Explanation:

V= 5 m/s < 70º

Vx= 1.71 m/s

Vy= 4.69 m/s

h= Vy * t - g * t²/2

clearing t for the flying time of the ball:

t= 0.95 s

d= Vx * t

d= 1.62 m

4 0
3 years ago
Two firefighters are trying to break through a door. One firefighter is heavy, and the other is light. If they run at the same s
frez [133]

Answer:

The Heavier Firefighter

Explanation:

Generally, more massive objects will have more intertia than less massive objects.  As such it takes more force to halt a more massive object if its moving at the same speed as a smaller object. This can also be thought of in the context of Newton's second law. The more force needed to accelerate an object means the more force the object will have.

6 0
2 years ago
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