B. The gravity acceleration is in the same direction as the force of gravity, and thus towards the centre of the earth
Answer:
567m
Explanation:
By using formula of velocity.
1 watt = 1 joule per sec
11,000 Watts = 11,000 joules per sec
The frequency doesn't matter.
Answer:
The magnitude of the electric force on a protein with this charge is 
Explanation:
Given that,
Electric field = 1500 N/C
Charge = 30 e
We need to calculate the magnitude of the electric force on a protein with this charge
Using formula of electrostatic force

Where, F = force
E = electric field
q = charge
Put the value into the formula


Hence, The magnitude of the electric force on a protein with this charge is 
Friction between the ball and the floor is stealing some of the kinetic energy of the ball, and turning it into heat.