Using the mirror formula.
1/v + 1/u = 1/f
1/9.5 + 1/3.2 = 1/f
1/f = 3.2 + 9.5 / 9.5 * 3.2
1/f = 4.82 cm
Radius = 2f
Radius = 2 x 4.82
Radius = 9.64 cm
The correct answer is
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force per unit charge.
In fact, the electric field strength is defined as the electric force per unit charge experienced by a positive test charge located in the electric field. In formula:
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where
E is the electric field strength
F is the electric force experienced by the charge
q is the positive test charge.
Answer:
625 N
Explanation:
The impulse given to the nail is equal to the change in momentum of the hammer:

where
F is the force exerted by the hammer
is the time of contact
is the mass
is the change in velocity of the hammer
Substituting the data and re-arranging the equation, we can find the force:

3. Coal burning
The coal releases chemicals when it is burned. So it is chemical to thermal.
Answer:
The answer is 14.8 m/s.
Explanation:
Substituting 22.1 revolutions for f, 6.4 meters for R in Relation between velocity and frequency of motion.
V = (2π) ( 22.1) (6.4)
= ( 2π) ( 22.1 rev/ min) ( 1min÷ 60 s )(6.4)
= 14.8 m/s.