Answer:
A,B,C,D, and F are correct
Explanation:
Explanation:
step 1. a diverging lens is "concave" on both side and always has a negative focal length
step 2. so 1/f = 1/s + 1/s' where f is the focal length, s is the object location, and s' is the image location (f, s, s' are all on the left side of the lens)
step 3. 1/-15 = 1/s + 1/-9 (image is virtual (negative))
step 4. 3/-45 = 1/s + 5/-45
step 5. s = 22.5cm (object is 22.5cm from lens)
step 6. s'/s = 9/22.5 ÷ 0.4 (magnification)
step 7. if the object is 4.5cm then the image is 4.5(0.4) = 1.8cm tall.
<span>The statement : According to the law of conservation of energy, the total amount of energy in the universe does not change, but remains constant - is TRUE. The main point which led me to decide is that our universe is the example of a closed system which means there's nothing inside. Hope you will agree with my opinion.
</span>
Answer:
The work done by the friction force is 11700J
Explanation:
The work done by the friction force is given by:
According to Newton's second law:
So:
Answer:
Explanation:
Given
mass of Pendulum m=4 kg
Length of cable= 7.90 m
Distance between roof and Floor=10 m
will Provide Torque
thus 
where I=moment of inertia
=angular acceleration
here 
is small therefore \sin \theta \approx \theta
thus 
And 
Small angle refers to any angle where
i.e. any angle less than 
