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gladu [14]
3 years ago
5

Unequal heating of air over land and water results in breezes near shorelines. While the land is warm during the day, air above

it rises, and a cool breeze blows in from the sea. As the land cools off at night, air pressure over it increases, and a cool land breeze blows out to the sea.
a) true
b) false
Physics
1 answer:
Sveta_85 [38]3 years ago
7 0

Answer:

True

Explanation:

The answer to this question is true.

We have Sea breezes occuring during during days that are hot and summer days as a result of the unequal heating rates of land and water.

During the afternoon, we have the land surface getting heated up faster than the water surface. As this happens, air above it begins to rise which then forms low pressure area close to the land. Air on land is hotter than the one above water.

We then have cool air in areas with high pressure spreading across water and over land.

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A 1500 kg car moving with a speed of 20 m/s collides with a utility pole and is brought to rest in 0.30 s. Find the magnitude of
storchak [24]

Answer:

-100000 N.

Explanation:

Force: This can be defined as the product of the mass of a body and it's acceleration. The S.I unit of Force is Newton(N). The Formula of force is given as,

F = ma ........................... Equation 1

Where F = Average force exerted on the car, m = mass of the car, acceleration of the car, a = acceleration of the car.

a = (v-u)/t..................... Equation 2

Where v = Final velocity, u = Initial velocity, t = time.

Substitute equation 2 into equation 1

F = m(v-u)/t............. Equation 3

Given: m = 1500 kg, u = 20 m/s, v = 0 m/s (brought to rest), t = 0.3 s.

Substitute into equation 3

F = 1500(0-20)/0.3

F = 1500(-20)/0.3

F = -100000 N.

Note: The negative sign is due to the fact that the force exerted on the car by the pole is equal and opposite the force of the car.

7 0
4 years ago
A car makes a trip due north for three-fourths of the time and due south one-fourth of the time. The average northward velocity
jekas [21]

Answer:

v = 24.5 m

Explanation:

Average speed is defined as

       v = (x_{f} - x₀) / t

The distance is

        x = v t

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       v = (v_nort ¾ t + v_sud ¼ t) / t

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        v = 24.5 m

3 0
3 years ago
What are the results of habitat loss? choose the most likely outcome
zmey [24]
The Answer that makes the most sense is C.
5 0
3 years ago
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What shape is the Milky way galaxy
gizmo_the_mogwai [7]
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3 years ago
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A long straight wire carries a 40.0 A current in the +x direction. At a particular instant, an electron moving at 1.0  107 m/s
ser-zykov [4K]

Answer:

F=-1.28\times 10^{-16}\ N

Explanation:

Given that,

Current flowing in the wire, I = 40 A (+x direction)

Speed of the electron, v=10^7\ m/s (+y direction)

Distance from the wire, r = 0.1 m

Let F is the electric force on the electron. It is given by :

F=qvB\ sin\theta

Here, \theta=90

F=qvB

Here, B=\dfrac{\mu_oI}{2\pi r}

F=qv\dfrac{\mu_oI}{2\pi r}

F=-1.6\times 10^{-19}\times 10^7\times \dfrac{4\pi\times 10^{-7}\times 40}{2\pi \times 0.1}

F=-1.28\times 10^{-16}\ N

So, the force on the electron at this instant is -1.28\times 10^{-16}\ N. Hence, this is the required solution.

5 0
4 years ago
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