All waves do carry energy. True.
Answer:
Velocity of rocket will be equal to 7.81 m/sec
Explanation:
We have given mass of the rocket 
Mass of fuel is given 
( As 1 kg is equal to 1000 gram )
Velocity of fuel 
= 625 m/sec
We have to find the velocity of rocket 
From conservation of momentum we know that initial momentum is equal to final momentum '
So 
, here 
is mass of rocket is velocity of rocket 
is mass of fuel and is velocity of fuel
So 
So velocity of rocket will be equal to 7.81 m/sec
A subcritical state will result by flattening a critical mass of fissionable material into the shape of a hamburger.
To find the answer, we need to know about the critical mass.
<h3>What is critical mass?</h3>
- A material's nuclear characteristics (particularly, its nuclear fission cross-section), density, shape, enrichment, purity, temperature, and environment all affect its critical mass.
- A mass of fissile material is considered to be in a critical state when a nuclear chain reaction in the mass is self-sustaining and there is no change in power, temperature, or neutron population.
- At a specific temperature, a mass might be precisely critical.
- A subcritical state will result by flattening a critical mass of fissionable material into the shape of a hamburger.
- The cross sections for fission and absorption grow as the relative neutron velocity drops.
Thus, we can conclude that, a subcritical state will result by flattening a critical mass of fissionable material into the shape of a hamburger.
Learn more about the critical mass here:
brainly.com/question/12545809
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