Not sure.can you give me a clue?
Answer:
Human activities commonly affect the distri-
bution, quantity, and chemical quality of water
resources. The range in human activities that affect
the interaction of ground water and surface water is
broad.Explanation:
Answer:
-0.7 m/s
Explanation:
Initial velocity (u)= 2.5 m/s
Acceleleration (a)= -0.8 m/s^2
Time taken (t) = 4 seconds
Hence,
v=u+at [1st Equation of motion]
v=2.5+-0.8*4
v=2.5-3.2
v=-0.7 m/s
Note that the negative sign indicates that the ball has changed direction and rolls downwards with gravity
Answer:
Q = 160.36[kJ], is the heat lost.
Explanation:
This is a thermodynamic problem where we can find the latent heat of vaporization, at a constant temperature of 100 [°C].
We know that for steam at 100[C], the enthalpy is
![h_{gas} = 2675.6[kJ/kg]](https://tex.z-dn.net/?f=h_%7Bgas%7D%20%3D%202675.6%5BkJ%2Fkg%5D)
For liquid water at 100[C], the enthalpy is
![h_{water} = 419.17[kJ/kg]](https://tex.z-dn.net/?f=h_%7Bwater%7D%20%3D%20419.17%5BkJ%2Fkg%5D)
Therefore
![h_{g-w} = 2675.6-419.17 = 2256.43[\frac{kJ}{kg} ]](https://tex.z-dn.net/?f=h_%7Bg-w%7D%20%3D%202675.6-419.17%20%3D%202256.43%5B%5Cfrac%7BkJ%7D%7Bkg%7D%20%5D)
The amout of heat is given by:
![Q=h_{g-w}*m\\ where:\\m = mass = 0.07107[kg] = 71.01[g]\\Q = heat [kJ]\\Q =2256.43*0.07107\\Q=160.36[kJ]](https://tex.z-dn.net/?f=Q%3Dh_%7Bg-w%7D%2Am%5C%5C%20where%3A%5C%5Cm%20%3D%20mass%20%3D%200.07107%5Bkg%5D%20%3D%2071.01%5Bg%5D%5C%5CQ%20%3D%20heat%20%5BkJ%5D%5C%5CQ%20%3D2256.43%2A0.07107%5C%5CQ%3D160.36%5BkJ%5D)
Answer:
Animal Cells
Explanation:
they dont have cell walls because they dont need them. Wall cells are found in plants, which animals dont need.
