Answer:
1.
2.
Explanation:
1.Momentum is given as the product of mass by velocity of an object.
Momentum,
m=1,500kh, v=6m/s

2.Momentum,
m=7800kg, v=30m/s

new mass=7800+800=8600
As mass is increased, so does the resultant velocity as mass is directly proportional to velocity.

Answer:
A. a system that can be affected by the outside environment, by an exchange of matter or energy
With this temperature the Earth Radiation will be centered on a Wavelength!
<em><u>the answer is electrons </u></em>