Answer:
Albert Einstein was from Germany he was born theoritical physicist, from childhood only he loved mechanical toys, he was highly gifted in Mathematics, He was a world citizen and a scientific genius too. His contribution were:
1) he developed the theory of relativity
2) he also discovered the process of nuclear fission
3)he developed the quantum theory of specific heat
4)theory of stimulated emission, on which laser device technology is based
5) law of photoelectric effect
hope it helped you :)
Answer:
Ionic substances, also known as salts, conduct electricity when dissolved in water or when in the liquid state
Explanation:
The FIRST statement on the list is the definition of momentum, so that's the one that must be true.
Answer:
The electric force on the top charge is 
.
Explanation:
Given that,
Electric charges in a thundercloud, 
The distance between charges, d = 2.3 km = 2300 m
Let F is the electric force on the top charge. The electric force is given by the formula as :
or
So, the electric force on the top charge is . Hence, this is the required solution.
