Answer:
Charge, 
and it is negative.
Explanation:
Given that,
Mass of the charge, 
Electric field, E = 640 N/C
To find,
Charge
Solution,
The electric force and the force of gravity are balanced in the electric field. It is given by :
Since, the electric field is in downward direction. The force must be upward direction s that the charge is negative.
Answer:
An indirect measurement of the speed of molecules is temperature
Answer:
Alright, I will, and thank you for the brainliest!
Explanation:
Answer:
Electromagnetic waves differ from mechanical waves in that they do not require a medium to propagate. This means that electromagnetic waves can travel not only through air and solid materials, but also through the vacuum of space.
Explanation:
Since electromagnetic waves do not require a medium to pass through, they are faster in matter that has fewer particles. ... ~ Sound cannot travel in a vacuum because mechanical waves, such as sound waves, require a medium to propagate through.
Plants get it from the roots or leaves
animals get it by breathing
