3 years ago

How are winds created? How does land and water heat differently?

Physics

1 answer:

zaharov [31]3 years ago

8 0

Wind creat by rain, rain created by water, water created from pee

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Find the hiker’s gravitational potential energy if the cliff is 60m high

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Answer:

Potential energy is $U=mgh$

Explanation:

The potential energy depends on the mass, the acceleration of gravity g and the height at which the object or person is.

Potential energy $U=mgh$

In this case we would need to know the exact mass of the hiker in order to calculate the potential energy.

But we know the values of g and h

$g=9.81m/s^2$

$h=60m$

So, the potential energy

$U=m(9.81m/s^2)(60m)\\\\U=588.6*m$

m is the mass of the hiker, wich is not in the description of the problem.

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A compass in a magnetic field will line up __________.

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Line up in a direction parallel to the magnetic field lines<span />

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2. Name two specific contributions Bohr made to our understanding of atomic

pickupchik [31]

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Bohr's greatest contribution to modern physics was the atomic model. ... Bohr was the first to discover that electrons travel in separate orbits around the nucleus and that the number of electrons in the outer orbit determines the properties of an element

Explanation:

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An amplifier has a 50 watt output and a 5 watt input. what is the gain in decibels for this amplifier, rounded to the nearest de

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Gain in decibels is given by;

Gain db = 10*log (Po/Pi), where Po = Power output, Pin = Power input

Substituting;

Gain in db = 10 * log (50/5) = 10 db

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