Which is an example of a physical change?
2 answers:
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Answer:
Explanation:
Given that,
Mass of an object, m = 3.68 kg
It is whirled in a horizontal circle of radius 881 cm or 8.81 m
The object completes 10.8 revolutions every 18.8 s.
We need to find the centripetal acceleration of the object. It is given by the formula as follows :
...(1)
Where is angular velocity
10.8 revolutions = 67.85 rad
Put values in equation (1)
So, the centripetal acceleration of the object is .
Answer:
y = 150 Km
Explanation:
given,
Distance of the planet Mars from earth D = 2.11 × 10¹¹ m
The diameter of the telescope's objective lens d = 0.949 m
The wavelength of light λ = 553 nm
= 553 x 10⁻⁹ m
resolution of the telescope = ?
y = 150003 m
y = 150 Km
the minimum feature size is equal to y = 150 Km