Answer:
1. 59 Ω
2. 3 Ω
3. 0.625 kΩ
Explanation:
1. The total resistance in a series circuit is equal to the sum of the resistance.
Therefore, the total resistance in the first circuit is 59 Ω.
2. The total resistance in a parallel circuit is equal to the sum of the reciprocals of the resistance.
Therefore, the total resistance in the second circuit is 3 Ω.
3. This is another parallel circuit, so we use the same equation from above:
Therefore, the total resistance in the third circuit is 
kΩ, or 0.625 kΩ.
I hope this helps!
The probability ("odds") is smaller for nonsmokers when compared
to smokers.
If we had as much hard, reliable, repeatable, scientific evidence linking
cardiovascular disease with visits to the Empire State Building as we have
linking it with smoking, the Empire State Building would have been torn down
50 years ago.
Answer:
The football leaves with the velocity, u = 15.68 m/s
Explanation:
Given data,
The football bounces back up off the ground and is airborne for, t = 3.2 s
Let the football bounces back up off the ground in the vertical direction
The formula for time of flight is given by,
t = 2u /g
∴ u = gt / 2
Substituting the values,
u = 9.8 x 3.2 / 2
u = 15.68 m/s
Hence, the football leaves with the velocity, u = 15.68 m/s
<span>2. mass of both objects doubled?
Hope it helped!</span>
The force needed to accelerate an elevator upward at a rate of 
is 2000 N or 2 kN.
<u>Explanation:
</u>
As per Newton's second law of motion, an object's acceleration is directly proportional to the external unbalanced force acting on it and inversely proportional to the mass of the object.
As the object given here is an elevator with mass 1000 kg and the acceleration is given as , the force needed to accelerate it can be obtained by taking the product of mass and acceleration.
So 2000 N or 2 kN amount of force is needed to accelerate the elevator upward at a rate of .
