Answer:
high density can withstand high acceleration and applied forces
Heavy metals are toxic to humans,
the clay is quite abundant and in general it is not toxic
Explanation:
The selection of materials for the construction of rockets takes into account many aspects, the technical resistance to the demands of space travel, but also the abundance of the material. Heavy metals have two very serious problems. The first one, some of them are a little scarce in nature, but the most serious problem is that almost all of them are toxic to humans, for example: lead and mercury.
On the other hand, the clay is quite abundant and in general it is not toxic to living beings.
If we use Newton's second law
F = m a
let's use the concept of density
rho = m / V
m = rho V
let's substitute
F = rho V a
From this expression we see that a material with high density can withstand high acceleration and applied forces, such as those existing in spacecraft clearance and re-entry to Earth.
Unfortunately with this law there is no criterion to select a material unless its density is high, in addition to this criterion low toxicity criteria for human beings are used,
1 Weather-Weather is the state of the atmosphere, describing for example the degree to which it is hot or cold, wet or dry, calm or stormy, clear or cloudy
2
How much money do you make?
3
a Without the atmosphere, average temperature on Earth would be freezing! Below zero to be exact!
b The atmosphere protects us and animals from dangerous radiation from the Sun. Ultraviolet radiation is basically invisible rays of energy created by the sun.
cAlso, the atmosphere provides oxygen for humans and animals to breathe and C02 (Carbon dioxide) for plants.
4 warmth
5 yes it is The water on our Earth today is the same water that’s been here for nearly 5 billion years. Only a tiny bit of it has escaped out into space. As far as we know, new water hasn’t formed either.
That means there’s a very high chance the water in your glass is what thirsty dinosaurs were gulping about 65 million years ago.
The kinetic energy of 2.5 kg ball after collision is 27.09 J.
Answer:
Explanation:
In elastic collision, the sum of momentum of the objects before collision will be equal to the sum of momentum of the objects after collision.
We know that momentum is the product of mass and velocity acting on any object.
So, the conservation of energy in elastic collision leads to following equation:
Since, the momentum is conserved ,the kinetic energy will also be conserved in elastic collision. So
Since initial velocity for M1 ball is zero, then
and
So, on solving all the above equation, we get an equation for velocity and that is
=final velocity of ball with mass 2.5 kg
So kinetic energy will be 1/2 mv2
Kinetic energy of 2.5 kg ball is 
So the kinetic energy of 2.5 kg ball after collision is 27.09 J.
