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Jlenok [28]
3 years ago
9

PLEASE ANSWER QUICK :) -

Physics
1 answer:
vekshin13 years ago
4 0

Answer:

At a convergent boundary where both plates are continental, mountain ranges grow and earthquakes are common. At a transform boundary, there is a transform fault and massive earthquakes occur but there are no volcanoes. Processes acting over long periods of time create Earth's geographic features.

Explanation:

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HIV can be spread from one person to another through sex, contact with infected blood, or from a mother to her baby.
Triss [41]

Answer:

True.

Explanation:

7 0
3 years ago
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A mile is equivalent to 1.6 km. When you are driving at 60 miles per hour, what is your speed in meters per second?
yKpoI14uk [10]
FIrst, just write down what we know :)

1. 1 mile = 1.6klm
2. There are 3600 seconds in an hr (<em>60s x 60mins = 3600</em>).

Now to get to <em>meters per second</em> (m/s) we need to first work out <em>meters per </em><em>hr</em> (simply convert miles to klm and then multiply by 1000)<em>.</em>

60 x 1.6 = 96 klm/hr x 1000 = 96,000 meters/hr

Now we know this, we can simply divide the meters per hr by <em>how many seconds there are in 1hr</em> to get meters per second:

96000 / 3600 = 26.67m/s
6 0
3 years ago
About 60 percent of all known galaxies are classified as _____.
masha68 [24]
The answer that fills in the blank is the galaxies which are six percent is classified as the elliptical planet. The 60 percent are considered to be elliptical planets because they move in a way of the elliptical path that considers them to be more of an elliptical planet.
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3 years ago
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Light bending as it passes through a rain drop is an example of...
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The answer would be C. Refraction
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A sound from a source has an intensity of 270 db when it is 1 m from the source. what is the intensity of the sound when it is 3
Lina20 [59]
Sound intensity is inversely proportional to the square of the distance between the source and the receiver.
That is 
I = k/r^2
 where
 k = constant
 r = radius

When r=1,  the intensity is I₁ = k/1 = k
When r=3, the intensity I₂ = k/3² = k/9
Therefore
 I₂ = I₁ /9

In decibels,
I = 10 log₁₀(I/I₀)
where I₀ = reference intensity

When r=1,
10 log₁₀ (I₁/I₀) = 270

When r =3,
10 log₁₀ (I₂/I₀) = 10 log₁₀ [(I₂/I₁)*(I₁/I₀)]
                     = 10 log₁₀ [(1/9)*(I₁/I₀)]
                     = 10 log₁₀(1/9) + 270
                     = 260.5

Answer: 260.5 dB (nearest tenth)
4 0
3 years ago
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