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3 years ago

The diagram shows how air moves near the coast on a warm day. Explain why air moves as shown on the diagram. 5 marks

Physics

1 answer:

BartSMP [9]3 years ago

3 0

Answer:

See the answer below

Explanation:

Because water has higher specific heat capacity than water, land usually gets heated and loses heat faster than water.

During a warm day, the air above land gets heated quickly more than the air above water. This warm, less dense air above land begins to rise, creating a low pressure in the process. This paves way for the denser, cold air above water to replace the vacuum created by the warm air above land.

<em>The directional movement of air from water to land is what is known as the sea breeze in coastal areas.</em>

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A crate is given a push across a horizontal surface. The crate has a mass m, the push gives it an initial speed of 1.90 m/s, and

Roman55 [17]

Answer:

a) $s = 1.534\,m$ , b) $s = 6.135\,m$

Explanation:

a) The energy equation for the crate is modelled after the Principle of Energy Conservation and Work-Energy Theorem. Changes in gravitational potential energy can be neglected due to the information of a horizontal surface:

$K_{A} = W_{loss}$

$\frac{1}{2}\cdot m \cdot v^{2} = \mu_{k} \cdot m \cdot g\cdot s$

The distance that crate needs to cover before stopping is:

$s = \frac{v^{2}}{2\cdot \mu_{k}\cdot g}$

$s = \frac{(1.90\,\frac{m}{s} )^{2}}{2\cdot (0.120)\cdot (9.807\,\frac{m}{s^{2}} )}$

$s = 1.534\,m$

b) The stopping distance is:

$s = \frac{(3.80\,\frac{m}{s} )^{2}}{2\cdot (0.120)\cdot (9.807\,\frac{m}{s^{2}} )}$

$s = 6.135\,m$

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How is Uranus colder than Neptune

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nadezda [96]

Answer:

v doubles and f is unchanged

Explanation:

According to the formula v = f¶

Where v is the velocity of the wave

f is the frequency

¶ is the wavelength

Velocity is directly proportional to wavelength. Direct proportionality shows that increase in velocity will cause an increase in the wavelength and decrease in velocity will also cause a decrease in wavelength with the frequency not changing since the velocity and wavelength are both increasing and decreasing at the same rate.

According to the question, if the wavelength is doubled, the velocity (v) will also double while the frequency (f) remains unchanged.

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aliya0001 [1]

Answer:

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the resistance of a wire is proportional to its length, and inversely proportional to its cross-sectional area.

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