Answer:
I belive it would be the first answer choice.
Explanation:
When the Mass is lower, the ball moves faster so it would have more kintetic energy
A) The rhino's average velocity on the x-axis is

. The position x after time t=21.5 s can be found by using the relationship:

where we used

as the x-position at time t=0, since the rhino was at the origin.
SImilarly, the average velocity on the y-axis is

, and the y-position after time t=21.5 s can be found by using:

where we used

since the the rhino was at the origin at time t=0.
b) The distance of the rhino from the origin can be calculated by calculating the resultant of the displacement of the rhino on both axes:
Answer:
16 is D, 17 is A, 18 is C, 19 is B ( would approve of brainliest)
Explanation:
16 is D, 17 is A, 18 is C, 19 is B
Calcite or Salt I would presume
Answer:
The value is 
Explanation:
From the question we are told that
The order of the dark fringe is m = 2
The diffraction angle is 
The diffraction grating is 
Generally separation between the slits is mathematically represented as

=> 
Generally the condition for destructive interference is mathematically represented as

=> ![5 *10^{-6} sin(20) = [2 + \frac{1}{2}] * \lambda](https://tex.z-dn.net/?f=5%20%2A10%5E%7B-6%7D%20sin%2820%29%20%3D%20%20%5B2%20%2B%20%5Cfrac%7B1%7D%7B2%7D%5D%20%2A%20%5Clambda)
=> 
=> 