Answer:
Electric force, 
Explanation:
It is given that,
Magnitude of electric field, 
Charge, 
The electric field is directed parallel to the positive y axis. We need to find the force on the charge particle. It is given by :



So, the electric force on the charge is
. Hence, this is the required solution.
Speed is the speed that object is moving on while velocity is the direction and movement speed you can make it but velocity no
Answer:

Explanation:
Suppose the tension in the ribbon is T.
The upwards component of the tension = Tcos13
The horizontal component of the tension = Tsin13
The weight of the medal = mg
In a vertical direction, mg is balanced by Tcos13, so mg=Tcos13, so T = mg/cos13. The horizontal component of T is the force causing m to accelerate.

Substituting T= mg/cos13 gives:

cancels and you have

When two sound waves of different frequencies approach the ear, the alternating constructive and destructive interference causes the sound to be alternatively soft and loud - producing beats