1 An ice cube has the following dimensions.
1 answer:
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Answer:
<em>The acceleration of the racecar is</em>
Explanation:
<u>Uniformly Accelerated Motion</u>
It's a type of motion in which the velocity of an object changes by an equal amount in every equal period of time.
Following the definition above, the acceleration is defined as:
Where a is the constant acceleration, vo the initial speed, vf the final speed, and t the time.
The racecar goes from vo=18.5 m/s to vf=46.1 m/s in t=2.47 seconds, thus the acceleration is:
The acceleration of the racecar is
(a)
The velocity of the meteorite just before hitting the ground is:
The loss of energy of the meteorite corresponds to the kinetic energy the meteorite had just before hitting the ground, so:
(b) 1 megaton of tnt is equal to
To find to how many megatons the meteorite energy loss
corresponds, we can set the following proportion
And so we find
So, 0.162 megatons.
(c) 1 Hiroshima bomb is equivalent to 13 kilotons (13 kT). The impact of the meteorite had an energy of
. So, to find to how many hiroshima bombs it corresponds, we can set the following proportion:
And so we find
So, the energy released by the impact of the meteorite corresponds to the energy of 12.46 hiroshima bombs.
The velocity of the meteorite just before hitting the ground is:
The loss of energy of the meteorite corresponds to the kinetic energy the meteorite had just before hitting the ground, so:
(b) 1 megaton of tnt is equal to
To find to how many megatons the meteorite energy loss
corresponds, we can set the following proportion
And so we find
So, 0.162 megatons.
(c) 1 Hiroshima bomb is equivalent to 13 kilotons (13 kT). The impact of the meteorite had an energy of
And so we find
So, the energy released by the impact of the meteorite corresponds to the energy of 12.46 hiroshima bombs.