For me: WASH OUR HANDS REGULARLY
Answer:
0.255 m
Explanation:
We are given that
Diameter=d=63.5 cm=

L=265 km =
Wavelength,

We have to find the minimum distance between two objects on the ground if their images are to be resolved by this lens.





Answer:
option A
Explanation:
given,
travel distance = 1 mm
diffusion constant for the molecule of oxygen in water = 1 x 10⁻⁹ m²/s
we know that

t is the time taken for diffusion
x = 1 mm = 10⁻³ m
D is the diffusion


t = 500 s
so, the option to the answer is 170 s
the correct answer is option A
D. the wavelengths that the pigmented object after interacting with sunlight