Answer:
mass = 0.44 Kg
Explanation:
given,
Calories contain in the strawberry yogurt = 255 calories
1 Calorie = 4186 J
latent heat of vaporization = 2.42 x 10⁶ J/Kg
mass of perspiration = ?
Energy = 255 calories
Energy = 255 x 4186
= 1067430 J
Energy = mass x latent heat of vaporization
![mass = \dfrac{Q}{L_v}](https://tex.z-dn.net/?f=mass%20%3D%20%5Cdfrac%7BQ%7D%7BL_v%7D)
![mass = \dfrac{1067430}{2.42 \times 10^6}](https://tex.z-dn.net/?f=mass%20%3D%20%5Cdfrac%7B1067430%7D%7B2.42%20%5Ctimes%2010%5E6%7D)
mass = 0.44 Kg
Explanation:
It is given that,
The total mass of the wagon, rider and the rock is 99 kg
The mass of the rock is 0.261 kg.
The initial speed of the wagon, u = 0.519 m/s
Speed of the rock, u' = 15.9 m/s
(a) Let v is the speed of the wagon after the rock is thrown directly in forward direction.
The momentum will remain constant. Using the conservation of momentum as :
![99\times 0.261=0.261\times 15.9+(99-0.261)v](https://tex.z-dn.net/?f=99%5Ctimes%200.261%3D0.261%5Ctimes%2015.9%2B%2899-0.261%29v)
v = 0.22 m/s
(b) Let v' is the speed of the wagon after the rock is thrown directly in opposite direction, u' = -15.9 m/s
![99\times 0.261=0.261\times (-15.9)+(99-0.261)v](https://tex.z-dn.net/?f=99%5Ctimes%200.261%3D0.261%5Ctimes%20%28-15.9%29%2B%2899-0.261%29v)
v' = 0.304 m/s
Hence, this is the required solution.
Answer:
273 Kelvin
Explanation:
If -273 Celsius is 0 Kelvin, then 273 Kelvin will be 0 Celsius.
<span>Use the cosine rule to solve for the distance the wind pushed them to the east and because this all happened in an hour, you can say they travelled this distance per hour.
+-130 km due east which means the wind speed was +-130km/h.
So for example i used a^2=b^2+c^2-2bc(cos75) b will be the distance they travelled and c= 135cos75=35km now all you do is substitute in and you will get your distance that the wind pushed them to the east and because it was an hour of travel the distance as said before will be per hour. </span>
C. By preventing flooding, creating reservoirs, and providing water for irrigation