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3 years ago

A slow moving river of ice

Physics

2 answers:

Komok [63]3 years ago

3 0

Alpine glaciers<span> is the answer
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irina1246 [14]3 years ago

3 0

A "slow moving river of ice" is a glacier. A slow moving chunk of ice floating down a river is a "floe".

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One particular descent goes from 2100m to 1600m. Assuming work done against friction is 90% of the potential energy change of th

alisha [4.7K]

Answer:

1/2 M V^2 = .1 M g H where 10% of PE goes into KE

V^2 = .2 g H = .2 * 9.8 * (2100 - 1600) = 980 m^2 / s^2

V = 31.1 m/s increase in speed during descent

1 km / hr = 1000 m / 3600 sec = .278 m/s

V = 31.1 m/s / (.278 m/s / km /hr)= 112 km/hr

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2 years ago

Light includes which of the following?

Gala2k [10]

Answer:

Light includes ALL of these answers: Radio/Microwaves. Visible light and X-rays/Gamma rays.

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3 years ago

Read 2 more answers

Why reaction force must exist

Fittoniya [83]

Newton's 3rd law:
Every action has an equal and opposite reaction.
When you apply force on an object, there is an equal force applied on you from that object.

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3 years ago

What was one result of the second great awakening

Brrunno [24]

The membership rose among the baptist and methodists.

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4 years ago

Water flows through a cylindrical pipe of varying cross-section. The velocity is 3.0 m/s at a point where the pipe diameter is 1

Setler79 [48]

Answer:

The flow rate is $R =2.357 *10^{-4} \ m^3/s$

Explanation:

From the question we are told that

The velocity is $v = 3.0 \ m/s$

The diameter of the pipe is $d = 1.0 \ cm = 0.01 \ m$

The radius of the pipe is mathematically represented as

$r = \frac{d}{2}$

substituting values

$r = \frac{0.01}{2}$

$r = 0.005 \ m$

The flow rate is mathematically represented as

$R = v * A$

Where is the cross-sectional area of the pipe which is mathematically evaluated as

$A = \pi r^2$

substituting values

$A = 3.142 * (0.005)^2$

$A = 7.855 * 10^{-5} \ m^2$

$R = 3.0 * 7.855 *10^{-5}$

$R = 2.357*10^{-4} \ m^3 /s$

8 0

3 years ago