Answer:
<h3>Speed is the change in distance over time; velocity is speed plus direction</h3>
Explanation:
Speed is defined as the change in distance covered by a body with respect to time while velocity the change in displacement of a body with respect to time. Speed is a scalar quantity since it does not specifies direction while velocity is a vector quantity because it specifies both magnitude and direction.
Speed can only be equal to the velocity if it also specifies direction.
Based on the definition above, it can be concluded that speed is the change in distance over time and velocity is speed plus direction.
Answer
given,
largest diameter of balls = 9.52 mm = 0.00476 m
radius = 0.00476
smallest diameter of ball = 2.38 mm = 0.00238 m
radius = 0.00119
viscosity = 1.5 Pa.s
density of the ball = 1.42 g/cm
![F = 6\pi \eta r V_t](https://tex.z-dn.net/?f=F%20%3D%206%5Cpi%20%5Ceta%20r%20V_t)
![F = \dfrac{mv}{t}](https://tex.z-dn.net/?f=F%20%3D%20%5Cdfrac%7Bmv%7D%7Bt%7D)
![F = \dfrac{\dfrac{4}{3}\pi\ r^3\times (\rho-\sigma) \times 0.99 V_T}{t}](https://tex.z-dn.net/?f=F%20%3D%20%5Cdfrac%7B%5Cdfrac%7B4%7D%7B3%7D%5Cpi%5C%20r%5E3%5Ctimes%20%28%5Crho-%5Csigma%29%20%5Ctimes%200.99%20V_T%7D%7Bt%7D)
![6\pi \eta r V_t = \dfrac{\dfrac{4}{3}\pi\ r^3\times rho \times 0.99 V_T}{t}](https://tex.z-dn.net/?f=6%5Cpi%20%5Ceta%20r%20V_t%20%3D%20%5Cdfrac%7B%5Cdfrac%7B4%7D%7B3%7D%5Cpi%5C%20r%5E3%5Ctimes%20rho%20%5Ctimes%200.99%20V_T%7D%7Bt%7D)
![t = \dfrac{\dfrac{4}{3}\pi\ r^3\times rho \times 0.99 V_T}{6\pi \eta r V_t}](https://tex.z-dn.net/?f=t%20%3D%20%5Cdfrac%7B%5Cdfrac%7B4%7D%7B3%7D%5Cpi%5C%20r%5E3%5Ctimes%20rho%20%5Ctimes%200.99%20V_T%7D%7B6%5Cpi%20%5Ceta%20r%20V_t%7D)
![t= \dfrac{0.22 r^2 (\rho-\sigma) }{\eta}](https://tex.z-dn.net/?f=t%3D%20%5Cdfrac%7B0.22%20r%5E2%20%28%5Crho-%5Csigma%29%20%7D%7B%5Ceta%7D)
for small balls
![t= \dfrac{0.22\times 0.00119^2 (1460-1300)}{1.5}](https://tex.z-dn.net/?f=t%3D%20%5Cdfrac%7B0.22%5Ctimes%200.00119%5E2%20%281460-1300%29%7D%7B1.5%7D)
t = 0.033 ms
for larger ball
![t= \dfrac{0.22\times 0.00476^2 (1460-1300)}{1.5}](https://tex.z-dn.net/?f=t%3D%20%5Cdfrac%7B0.22%5Ctimes%200.00476%5E2%20%281460-1300%29%7D%7B1.5%7D)
t = 0.531 ms
Answer:
The answer is B .pls don't forget to hit me brainliest tnks
The answer would be Matter