Explanation:
initial velocity(u) = 90 km/s = 25 m/s
time (t) = 5 sec
mass (m) = 200 kg
final velocity (v) = 0 m/s
v = u + at
0 = 25 + a * 5
-25 = 5 a
-5 = a
Therefore acceleration = -5m/s²
Force = mass * acceleration
F = 200*-5
F = -1000 N
Answer:
To balance an equation such as Mg + O2 → MgO, the number of the atoms in the product must equal the number of the atoms in the reactant. Mg + O2 --> MgO. To balance an equation, we CAN change coefficients, but NOT SUBSCRIPTS to balance equations.
Explanation:
Answer:
![74^{\circ} C](https://tex.z-dn.net/?f=74%5E%7B%5Ccirc%7D%20C)
Explanation:
We are given that
Mass of glass,![m=300 g](https://tex.z-dn.net/?f=m%3D300%20g)
![T_1=23^{\circ}](https://tex.z-dn.net/?f=T_1%3D23%5E%7B%5Ccirc%7D)
Volume,![V=236cm^3](https://tex.z-dn.net/?f=V%3D236cm%5E3)
Mass of water=![density\times volume=1\times 236=236 g](https://tex.z-dn.net/?f=density%5Ctimes%20volume%3D1%5Ctimes%20236%3D236%20g)
Density of water=![1g/cm^3](https://tex.z-dn.net/?f=1g%2Fcm%5E3)
Temperature of hot water,![T=87^{\circ}](https://tex.z-dn.net/?f=T%3D87%5E%7B%5Ccirc%7D)
Specific heat of glass,![C_g=0.2cal/g^{\circ}C](https://tex.z-dn.net/?f=C_g%3D0.2cal%2Fg%5E%7B%5Ccirc%7DC)
Specific heat of water,![C_w=1 cal/g^{\circ}C](https://tex.z-dn.net/?f=C_w%3D1%20cal%2Fg%5E%7B%5Ccirc%7DC)
![Q_{glass}=m_gC_g(T_f-T_1)=300\times 0.2(T_f-23)](https://tex.z-dn.net/?f=Q_%7Bglass%7D%3Dm_gC_g%28T_f-T_1%29%3D300%5Ctimes%200.2%28T_f-23%29)
![Q_{water}=m_wC_w(T_f-T)=236\times 1(T_f-87)](https://tex.z-dn.net/?f=Q_%7Bwater%7D%3Dm_wC_w%28T_f-T%29%3D236%5Ctimes%201%28T_f-87%29)
![Q_{glass}+Q_{water}=0](https://tex.z-dn.net/?f=Q_%7Bglass%7D%2BQ_%7Bwater%7D%3D0)
![300\times 0.2(T_f-23)+236\times 1(T_f-87)](https://tex.z-dn.net/?f=300%5Ctimes%200.2%28T_f-23%29%2B236%5Ctimes%201%28T_f-87%29)
![60T_f-1380+236T_f-20532=0](https://tex.z-dn.net/?f=60T_f-1380%2B236T_f-20532%3D0)
![296T_f=20532+1380=21912](https://tex.z-dn.net/?f=296T_f%3D20532%2B1380%3D21912)
![T_f=\frac{21912}{296}=74^{\circ} C](https://tex.z-dn.net/?f=T_f%3D%5Cfrac%7B21912%7D%7B296%7D%3D74%5E%7B%5Ccirc%7D%20C)
da answer is liquiddddddddd
Here is the correct answer of the given question above. When a person steps forward out of a small boat onto a dock, the boat recoils backward in the water and this occurs because the total momentum of the system is conserved. Hope this helps.