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1 year ago

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

1 answer:

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:

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What are the methods of heat transfer?

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Answer:

Radiation , Conduction and Convection

Explanation:

Those are the ways heat is transferred

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3 years ago

Two trains are traveling on the same track and in the same direction. The first train, which is behind the second train, blows a

Andrews [41]

Answer:

37.545 m/s

Explanation:

f' = Actual frequency of horn = 269 Hz

f = Observed frequency of horn = 290 Hz

v = Speed of sound in air = 343 m/s

$v_0$ = Speed of second train = 13.7 m/s

$v_s$ = Speed of first train

From Doppler effect we have

$f=f'\dfrac{v-v_0}{v-v_s}\\\Rightarrow v_s=v-\dfrac{f'}{f}(v-v_0)\\\Rightarrow v_s=343-\dfrac{269}{290}(343-13.7)\\\Rightarrow v_s=37.545\ m/s$

The speed of the first train is 37.545 m/s

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3 years ago

A metal detector used in airports is actually a large coil of wire carrying a small current. Explain how it detects a gun, even

Alexus [3.1K]

<u>Metal detectors work by transmitting an electromagnetic field from the search coil into the ground. Any metal objects (targets) within the electromagnetic field will become energised and retransmit an electromagnetic field of their own. The detector’s search coil receives the retransmitted field and alerts the user by producing a target response. metal detectors are capable of discriminating between different target types and can be set to ignore unwanted targets. </u>

1. Search Coil

The detector’s search coil transmits the electromagnetic field into the ground and receives the return electromagnetic field from a target.

2. Transmit Electromagnetic Field (visual representation only - blue)

The transmit electromagnetic field energises targets to enable them to be detected.

3. Target

A target is any metal object that can be detected by a metal detector. In this example, the detected target is treasure, which is a good (accepted) target.

<em>hope this helps PLEASE MARK AS BRAINLIEST:)</em>

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2 years ago

How do butterfly dest on there wings

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They have scales and they rub off easily

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3 years ago

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Vesna [10]

Answer:

Explanation:

Radiant= list onto solar panels, Electric= solar into power, Radiant= Electric into light

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3 years ago

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