Explanation:
Image distance, v = -17 cm (-ve for virtual image)
Radius of curvature of concave mirror, R = 39 cm
Focal length, f = -19.5 cm (-ve for a concave mirror)
(a) Using mirror's formula as :
u = 132.6 cm
So, the object is placed 132.6 cm in front of the mirror.
(b) Magnification of the mirror, 
m = -0.128
Hence, this is the required solution.
Answer:
Current through each resistor is 2 A.
Explanation:
Given that,
Voltage of a battery, V = 5 volts
Resistance 1, R = 1.25 ohms
Resistance 2,R' = 1.25 ohms
Both resistors are connected in series. The equivalent resistance is given by :
R" = R + R'
R" = 1.25 + 1.25
R" = 2.5 ohms
The current flowing throughout all resistors is same in series combination of resistors. Current can be calculated using Ohm's law as :
I = 2 A
So, the current through each resistor is 2 A. Hence, this is the required solution.
There is the force of gravity on you and the ball by the Earth. The other half of the pair would be you and the ball applying the force of gravity on the Earth.
When you dribble the ball the floor applies a normal force on the ball to keep it from going through the floor. The ball applies a normal force back on the floor. There is also a normal force on you when you walk.
There is an applied force by your hand on the ball when you hit the ball down. The ball also applies the same force on your hand in the opposite direction.
Answer:
Half-life units in 'years' & 'seconds' are the most widely used, but actually, whatever you wish ... sec, min, hrs, days, yrs. The application and one's preference could dictate more appropriate units.
Explanation:
Nuclear power is a much cleaner and more efficient way to get power than coal and much less expansive than solar or wind but it produces harmful wast and pollutes the air and has the chance for a nuclear melt down like in churnbyl
