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DaniilM [7]
3 years ago
8

Why do we need to take care of the surface water/groundwater?

Physics
2 answers:
ANEK [815]3 years ago
3 0

Answer:

sghskm

rohit zimheisbwhx

kati45 [8]3 years ago
3 0
Groundwater supply the water needs of people when there is little water on the surface. This is important; we need better management.
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Three children are at work.one is pushing a chair, another is pushing the sofa and the third one is pushing an empty trolley .wh
kari74 [83]

Answer:sofa

Explanation:the weight of the mass of that object can be heavy (er) than the rest

8 0
4 years ago
To get an idea of how much thermal energy is contained in the world's oceans, estimate the heat liberated when a cube of ocean w
kolbaska11 [484]

Answer:

Q = 4.52 10¹⁷ J

Explanation:

Thermal energy can be calculated with  

      Q = m c_{e} ΔT

in this case it indicates that we approximate seawater to pure water with  

    c_{e} = 4186 J/ kg K  

with the density

    ρ = m / V  

    m = ρ V  

    V = L³  

we substitute  

   m = ρ L³  

   Q = ρ L3 c_{e} ΔT

calculate  

   Q = 1000 (3 103) 3 4186 4  

   Q = 4.52 10¹⁷ J

5 0
3 years ago
2. A car travels 40 kilometers at an average speed of 80 km/h and then travels 40 kilometers at an average speed of 40 km/h. The
VARVARA [1.3K]
53.3 km/h is the average amount of the car trip if 80km
4 0
1 year ago
When the velocity of a body increase with time, it's acceleration is ---------
BabaBlast [244]

Answer:

Negative

Explanation:

4 0
3 years ago
A temperature of a 50 kg block increases by 15°C when 337,500 J thermal energy are added to the block. what is the block made of
DENIUS [597]

Answer:

Iron

Explanation:

H = mc∅

Above equation can be used here to find the answer to the question. this equation gives us the relationship between the heat energy supplied to a material and the temperature difference that the material would go through according to its mass.

here H is the Heat energy supplied to the material. m is the mass of the material. c is the specific heat capacity of the material and ∅ is the temperature difference applied to the material. we are given that H= 337,500J , m = 50 kg and ∅ = 15 °C. so from the equation now we can calculate the value of c. after calculating c we can find the material because c is an unique value for a particular material. no two materials have the same c value.

c = 337500/(50*15)

c = 450 J/(kg°C) - Iron (google the heat capacity value to find the answer Iron)

8 0
3 years ago
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