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Airida [17]
4 years ago
10

Why does the amount of water that flows in a river change during the year?

Physics
2 answers:
lyudmila [28]4 years ago
4 0
It mainly depends on the season of the year 
yawa3891 [41]4 years ago
3 0
<span>The amount of water that flows in a river change during the year because when it rains, it adds to the water, and it could flood. The water also freezes then melts again.</span>
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Does the weight of a vehicle get heavier with speed? &amp; why?
Julli [10]
I guess technically it does. 

But the only reason I know of that it should is the relativistic increase
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everyday speeds.

The effect gets larger at higher speeds.  For example, if the car is
cruising through the neighborhood at 6.71 million miles per hour
(1% the speed of light), then its mass, and therefore its weight,
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Now, if the driver were to put the pedal to the metal and open 'er up
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5 0
4 years ago
A hockey puck is at the top of a 10 m long slippery slope, that makes an angle of 30° to the horizontal and leads down to a flat
aleksklad [387]

To solve this problem, we will first apply the concepts related to trigonometric relations and then the conservation of energy. By the trigonometric relations we will find the height for the calculation of the potential energy. For the conservation of energy we will give the relationship between the kinetic energy and initial potential with the final kinetic energy. Therefore, first the height by trigonometric relation we have

h = Lsin\heta

h = 10sin30\°

h = 5m

Then by conservation of energy

E_i = E_f

mgh+\frac{1}{2}mv_i^2 = \frac{1}{2}mv_f^2

Here,

m = mass

g = Gravitational acceleration

v = Velocity

Rearranging to find the final velocity,

v_f = \sqrt{v_i^2+2gh}

v_f = \sqrt{5^2+(9.8*10)}

v_f = 11.1m/s

Therefore the correct answer is D.

7 0
3 years ago
Mirrors effectively operate because of this behavior of light
Monica [59]

reflective i do believe


4 0
3 years ago
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Zarrin [17]
The red tail flew 8 meters a second
3 0
3 years ago
How much force is necessary to stretch a spring 0.5 m when the spring constant is 190 N/m?
dexar [7]

Answer:

95 N

Explanation:

6 0
3 years ago
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