Answer:
B
Explanation:
Friction acts in a direction opposite to the motion of an object
The correct answer among the choices given is option B. The energy transformation that occurs in the core of a nuclear reactor is from nuclear energy to thermal energy. In a power plant nuclear fission which involves nuclear energy to heat up water around it. This part is the core of the process.
Answer:
the internal resistance of the battery be minimized
Explanation:
Because from
P= I²R+I²r
The amount of emf of battery delivered to the external load depends on internal resistance r such that the smaller the r the higher the emf
Answer: A.The moon doesn’t have an atmosphere to burn up the rocks before hitting the surface.
Explanation:
Unlike the Earth, the Moon does not have an atmosphere, this leads to at least to facts:
1) Since the atmosphere (in the case of Earth) is mainly composed of gases (including oxigen) that can make combustion; when a meteor enters in the atmosphere and gets in contact with oxigen it becomes flamable and part of it is burned and separated. Then, if the meteor was large enough, the parts that were not separated will impact on the Earth Surface.
In the Moon, meteors completely impact the surface.
2) In our planet, after the meteorite impact, the crater formed will gradually fade due to erosion caused by the atmosphere. In the case of the Moon, the craters remain intact, since there is not erosion on its surface.
Answer:
31556736
Explanation:
Since there are 60 seconds in a minute, 60 minutes in an hour, 24 hours in a day, and 365.24 days in a year, then you multiply all of those.
60*60*24*365.24 =
31556736
