The electric force between charged bodies decreases by a factor equal to the relative permittivity, ie:
F ∝ 1/ε
F = electric force, ε = relative permittivity
Find the scaling factor of F due to the change in ε:
k = 1/(0.9/0.45) = 1/2 = 0.5
Multiply the original F by k to find the new F:
F = 0.8N×k
F = 0.8N×0.5
F = 0.4N
The water molecules expand. When anything heats up, molecules spread further apart.
Answer:
the beetle's actual distance beneath the surface, d = 3.2 cm
Explanation:
The refractive index for the plastic is about 1.60
For overhead viewing, the expression for refractive index is
n = actual depth / apparent depth
Rearrange for actual depth
actual depth d = n x apparent depth
d = 1.60 x 2.0 cm
d = 3.2 cm
Explanation
If you graph the force on an object as a function of the position of that object, then the area under the curve will equal the work done on that object, so we need to find the area under the function to find the work
Step 1
find the area under the function.
so
Area:
so
therefore, the answer is
I hope this helps you
Explanation:
The expression is :
A =[LT], B=[L²T⁻¹], C=[LT²]
Using dimensional of A, B and C in above formula. So,
Comparing the powers both sides,
2n+m=1 ...(1)
2m-n=1 ...(2)
Now, solving equation (1) and (2) we get :
Hence, the correct option is (E).