a student claims that since the model of the atom has been changed so many times, that means it is a weak model. State whether y
2 answers:
You might be interested in
Explanation:
A distance-versus-time graph gives the distance an object has traveled after a given time.
In a distance-versus-time graph the slope represents the the speed of the object because is
And how steep the slope of the distance-versus-time graph is tells us how fast an object is moving; steeper the slope greater the speed. For example, a graph with slope 10 represents a greater speed than a graph with slope 2.
So the steepness of the slope of the distance-versus-time is the speed of the object, and greater the slope greater is the speed.
Answer:
The power of lens is 2.22 D.
Explanation:
Given that,
Distance of image v= 45 cm
We know that,
Distance of object u= ∞
Power of lens is the reciprocal of focal length.
We need to calculate the power of lens
Using formula of lens
Where, f = focal length
v = image distance
u = object distance
Put the value into the formula
Hence, The power of lens is 2.22 D.