Answer:
Mass of air is 594.66 kg
Explanation:
We have,
The density of air is ![1.29\ kg/m^3](https://tex.z-dn.net/?f=1.29%5C%20kg%2Fm%5E3)
Dimension of the room is 4.50 m x 7.88 m x 13.0 m
Volume of the room is ![4.50\times 7.88\times 13.0 =460.98\ m^3](https://tex.z-dn.net/?f=4.50%5Ctimes%207.88%5Ctimes%2013.0%20%3D460.98%5C%20m%5E3)
The density of an object is given by mass per unit its volume. Its mathematical form is given by :
![d=\dfrac{m}{V}](https://tex.z-dn.net/?f=d%3D%5Cdfrac%7Bm%7D%7BV%7D)
m is mass of air in a room
![m=d\times V\\\\m=1.29\times 460.98\\\\m=594.66\ kg](https://tex.z-dn.net/?f=m%3Dd%5Ctimes%20V%5C%5C%5C%5Cm%3D1.29%5Ctimes%20460.98%5C%5C%5C%5Cm%3D594.66%5C%20kg)
So, the mass of the air in a room is 594.66 kg.
<u><em>Kinetic Energy Pulls Any object to the ground.This Energy is a part of Gravity.</em></u>
<u><em>Wish you happy timez!</em></u>
Answer:
25.9 m/s
Explanation:
mass of ball, m = 0.145 kg
initial velocity, u = + 32 m/s
It bounce back with the velocity but in opposite direction so final velocity,
v = - v
Impulse, I = - 8.4 Ns
Impulse is defined as the change in momentum
I = m v - mu = m (v - u)
- 8.4 = 0.145 x (- v - 3 2)
- 57.9 = - v - 32
v = 57.9 - 32 = 25.9 m/s
Thus, the final speed of the ball is 25.9 m/s
Rainbows on an oily street after it's been raining. The colors in floating bubbles. Rainbows in the sink when using dish-soap.