Answer:
The magnification is 
Explanation:
From the question we are told that
The object distance is 
The focal length is 
From the lens equation we have that

=> 
substituting values


=> 
=> 
The magnification is mathematically represented as

substituting values


Nothing will change, it's still going at 9 km/h.
Hope this helps.
Answer:
3.3619 Nm
54.27472 rad
182.46618 J
86.88 W
Explanation:
= Initial angular momentum = 7.2 kgm²/s
= Final angular momentum = 0.14 kgm²/s
I = Moment of inertia = 0.142 kgm²
t = Time taken
Average torque is given by

Magnitude of the average torque acting on the flywheel is 3.3619 Nm
Angular speed is given by

Angular acceleration is given by

From the equation of rotational motion

The angle the flywheel turns is 54.27472 rad
Work done is given by

Work done on the wheel is 182.46618 J
Power is given by

The magnitude of the average power done on the flywheel is 86.88 W
Answer:
1000 N/C
Explanation:
Potential difference, V = 60 V
Distance between the plates, d = 6 cm = 0.06 m
The electric field between the plates is given by
E = V / d
E = 60 / 0.06 = 1000 N/C
Thus, the electric filed between the plates is 1000 N/C.
Answer:
165.529454
Explanation:
According to the Pythagorean Theorem for calculating the lengths of a right angle triangle's sides, a^2 + b+2 = c^2, where c is the longest side (and the side opposing the right angle). So in your case it would be 150*150 + 70*70 = 27400. And √ 27400 is your answer.