Answer:
Explanation:
In this problem, we need to convert 
to km².
We know that,
1 km = 1000 m
⇒ 1 km² = 10⁶ m²
So,
So, is equal to .
Answer:
Option b is show the chemical property of sodium....
Answer:
The electron from the ground state to occupy a next energy level. In this case,we say that the electron is excited
Answer:
See the answer below
Explanation:
<em>The slide could have broken due to the ramming of the objective (especially the high power objectives) into the slide on the stage of the microscope while trying to bring the object on the slide into focus.</em>
It is recommended to <u>start with the lowest objective while trying to focus a slide</u>. Thereafter, the next higher objective can be switched to and the image brought into focus once again. This can be repeated until the desired magnification of the image is reached.
However, <u>at higher objective powers, the coarse adjustment knob should be avoided </u>to avoid the objectives touching/breaking the slide. Instead, the fine adjustment knob should be used.
Hence, the breaking of the slide in the illustration could have been due to the use of the coarse adjustment knob at higher objective powers and the ramming of the objective into the slide.
Newton's third law states that every action has an equal and opposite reaction. The action and reaction forces are pairs of opposing forces.
In the given examples all three obey Newton's third law.
B) Action force: John pulls the door handle
Reaction: door handle gets pulled
C) Action force: Tire pushes on road
Reaction: The road pushes on the tire, vehicle moves
D) Action force: Exhaust pushes out of a rocket
Reaction: Rocket is pushed forward
Ans A) All these are examples of Newtons third law
