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Anna007 [38]
3 years ago
15

How can people who live near rivers control flodding

Physics
2 answers:
dimaraw [331]3 years ago
8 0
By building dams and levees . Hope this helps
a_sh-v [17]3 years ago
7 0

Answer: <em>Some methods of flood control have been practiced since ancient times.</em>

<em />

Explanation: <em>These methods include planting vegetation to retain extra water, terracing hillsides to slow flow downhill, and the construction of floodways (man-made channels to divert floodwater).</em>

<em />

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When floating a ping-pong ball with a hairdryer, which two forces are balanced?
garik1379 [7]
The force of gravity and the force of air
4 0
3 years ago
Read 2 more answers
Gold is a solid at room temperature and has the basic molecular-level structure illustrated below. The outer electrons of each g
Contact [7]

Answer: Did you ever find the answer I’m on the same question

Explanation:

5 0
3 years ago
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Two curves on a highway have the same radii. However, one is unbanked and the other is banked at an angle θ. A car can safely tr
Leviafan [203]

Answer:

θ = 29.38°

Explanation:

The centripetal force is given by the formula;

F_c = F_n(sin θ) = mv²/r

Now, the vertical component of the normal force is; F_n(cos θ)

Now, this vertical component is also expressed as; F_n(cos θ) = mg

Thus, the slope is;

F_n(sin θ)/F_n(cos θ) = (mv²/r)/mg

tan θ = v²/rg

v² = rg(tan θ)

The initial speed will be gotten from the relation;

(v_o)² = μ_s(gr)

Plugging rg(tan θ) for (v_o)², we have;

μ_s(gr) = rg(tan θ)

rg will cancel out to give;

μ_s = (tan θ)

Thus, θ = tan^(-1) μ_s

μ_s is coefficient of static friction given as 0.563

θ = tan^(-1) 0.563

θ = 29.38°

7 0
4 years ago
A hypothetical planet has a mass of one-half that of the earth and a radius of twice that of the earth. what is the acceleration
algol [13]
Let m = mass of earth 
<span>let r = radius of earth </span>
<span>let a = acceleration due to gravity on earth </span>
<span>G = constant (it doesn't change) </span>

<span>If you plug in the mass and radius of the new planet, you get </span>

<span>a = G (.5m)/(2r)^2 </span>
<span>a = 1/8 (Gm/r^2) </span>

<span>so the acceleration on the new planet is 1/8 what it is here.</span>
3 0
3 years ago
A thermometer containing 0.10 g of mercury is cooled from 15 degrees celsius to 8.5 degrees celcius. How much energy left the me
loris [4]

To solve this exercise we will use the concept related to heat loss which is mathematically given as

Q = mC_p \Delta T

Where,

m = mass

C_p= Specific Heat

\Delta T = Change in temperature

Replacing with our values we have that

m = 0.1g

C_p = 139J/Kg\cdot K \rightarrow Specific heat of mercury

\Delta T = 8.5\°C-15\°C = -6.5\°C \Rightarrow -6.5K

Replacing

Q = (0.1*10^3)(138)(-6.5)\\Q = -0.09J

Therefore the heat lost by mercury is 0.09J

5 0
3 years ago
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