Answer:
KE = 0.162 KJ
Explanation:
given,
mass of bullet (m)= 20 g = 0.02 Kg
speed of the bullet (u)= 1000 m/s
mass of block(M) = 1 Kg
velocity of bullet after collision (v)= 100 m/s
kinetic energy = ?
using conservation of momentum
m u = m v + M V
0.02 x 1000 = 0.02 x 100 + 1 x V
20 = 2 + V
V = 18 m/s
now,
Kinetic energy of the block
KE = 162 J
KE = 0.162 KJ
Answer: I put the importance of the lab in the topic is to find how dense an object is and if it can sink or float and it's important to answer the question so you can also find mass and volume.
Explanation: I dunno haha...
The forces of gravity between two objects depend on the masses
of both objects. So if one mass increases, then the objects will be
drawn together by stronger gravitational force.
Example:
When a person eats a lot of steak and fat and carbohydrates, his
mass increases, and the bathroom scale shows that the gravitational
forces drawing him and the Earth together have increased. We say
that he has "gained weight".
The greenhouse effect<span> occurs when Earth's atmosphere traps </span>solar<span>radiation ... infrared (IR) and other </span>types<span> of radiation that are invisible to the human eye. UV radiation has a shorter wavelength and a higher </span>energy<span> level </span>
I have some notes here that might help you answer the problem on your own:
<span>α = <span>dω / <span>dt
</span></span></span>Angular acceleration is derivative of angular velocity the same way as linear acceleration is derivative of linear velocity<span>
a = <span>dv / <span>dt
I hope my answer has come to your help. God bless and have a nice day ahead!</span></span></span>
