Answer:
![\boxed{\sf Time \ taken \ (t) = 8.8 \ s}](https://tex.z-dn.net/?f=%20%5Cboxed%7B%5Csf%20Time%20%5C%20taken%20%5C%20%28t%29%20%3D%208.8%20%5C%20s%7D%20)
Given:
Initial velocity (u) = 0 m/s
Final velocity (v) = 44 m/s
Acceleration (a) = 5 m/s²
To Find:
Time taken (t)
Explanation:
From equation of motion we have:
![\boxed{ \bold{v = u + at}}](https://tex.z-dn.net/?f=%20%5Cboxed%7B%20%5Cbold%7Bv%20%3D%20u%20%2B%20at%7D%7D)
By substituting value of u, v & a in the equation we get:
![\sf \implies 44 = 0 + 5t \\ \\ \sf \implies 44 = 5t \\ \\ \sf \implies 5t = 44 \\ \\ \sf \implies t = \frac{44}{5} \\ \\ \sf \implies t = 8.8 \: s](https://tex.z-dn.net/?f=%20%5Csf%20%5Cimplies%2044%20%3D%200%20%2B%205t%20%5C%5C%20%20%5C%5C%20%20%5Csf%20%5Cimplies%2044%20%3D%205t%20%5C%5C%20%20%5C%5C%20%20%5Csf%20%5Cimplies%205t%20%3D%2044%20%5C%5C%20%20%5C%5C%20%20%5Csf%20%5Cimplies%20t%20%3D%20%20%5Cfrac%7B44%7D%7B5%7D%20%20%5C%5C%20%20%5C%5C%20%20%5Csf%20%5Cimplies%20t%20%3D%208.8%20%5C%3A%20s)
This situation is a good analogy for a substance with a very high density.
The density of any substance is the mass per unit volume. In this case, the mass confined in the given volume is very high, which is the case for a substance with a high density. The particles in the material are also closely packed.
Because a solid is compact so sound can go through but a liquid is not solid and it traps the sound inside
The answer your looking for my friend is called evaporation
Answer:
The speed of the center of mass of the two carts is 0.103 m/s
Explanation:
It is given that,
Mass of the air track cart, m₁ = 350 g = 0.35 kg
Velocity of air track cart, v₁ = 1.25 m/s
Mass of cart, m₂ = 280 g = 0.28 kg
Velocity of cart, v₂ = -1.33 m/s (it is travelling in opposite direction)
We need to find the speed of the center of mass of the two carts. It is given by the following relation as :
![v_{cm}=\dfrac{m_1v_1+m_2v_2}{m_1+m_2}](https://tex.z-dn.net/?f=v_%7Bcm%7D%3D%5Cdfrac%7Bm_1v_1%2Bm_2v_2%7D%7Bm_1%2Bm_2%7D)
![v_{cm}=0.103\ m/s](https://tex.z-dn.net/?f=v_%7Bcm%7D%3D0.103%5C%20m%2Fs)
Hence, this is the required solution.