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4 years ago

11

How are volcanoes and wind similar? A. They both create igneous rock. B. They both can be constructive forces. C. They both form

deltas. D. They are both a form of physical weathering.

1 answer:

Gekata [30.6K]4 years ago

6 0

B. They both can be constructive forces.

Both volcanos and wind can shape the landscape... volcanos using eruptions and lava, wind using wind erosion when it gets "windy".

Hope this helps.

r3t40

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Give an example of a mixture that contains more than one state of matter

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GEL IT IS COMBINATION OF SOLID AND LIQUID

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y = 2.76 [m]

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4 years ago

A student on a skateboard is moving at a speed of 1.40 m/s at the start of a 2.15 m high and 12.4 m long incline. The total mass

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Answer:

W = 609.97J

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The work done by the friction force is negative because it is against the motion of the student.

W: work done by the student = ?

Wf: work done by the friction force

Wg: work done by the gravitational force

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d: distance traveled by the student

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vo: initial speed of the student = 1.40m/s

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You first calculate the distance d, with the Pythagoras' theorem

$d=\sqrt{(2.15m)^2+(12.4m)^2}=12.58m$

Furthermore, the angle α is:

$\alpha=tan^{-1}(\frac{2.15m}{12.4m})=9.83\°$

Then, you solve the equation (1) for W and replace the values of all parameters:

$W=\frac{1}{2}m(v^2-v_o^2)+F_fd-Mgsin\alpha d\\\\W=\frac{1}{2}(53.0kg)((6.90m/s)^2-(1.40m/s)^2)+(41.0N)(12.58m)\\-(53.0kg)(9.8m/s^2)sin(9.83\°)(12.58m)\\\\W=609.97J$

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4 years ago

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