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3 years ago

22. White noise is ...

Physics

1 answer:

GenaCL600 [577]3 years ago

6 0

22. I believe is a whole bunch of frequencies at the same time
23. Is neither of these

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A person walks 20.0° north of east for 3.20 km. How far would she have to walk due north and due east to arrive at the same loca

aivan3 [116]

Answer:

1.09 km, 3 km

Explanation:

displacement, d = 3.20 km at 20° North of east

A vector quantity has two components one along the x axis and the other is along Y axis. the component along X axis is called the horizontal component and it is due east.

The component along y axis is called vertical component and it is due North.

Displacement due North, dy = 3.20 Sin 20° = 1.09 km

Displacement due east, dx = 3.20 Cos 20° = 3 km

8 0

4 years ago

Each of the following figures shows Earth with a different axis tilt. (Assume that Earth's rotation period is unchanged.) Each a

mart [117]

Answer:

0º - 23.5º - 45º - 90º

Explanation:

The inclination angle of the Earth's axis with respect to its orbit around the Sun, determines that the duration enters the day and the night is different.

If it is not inclined (angle 0º) the two and niches have the same hardness

If the angle were very high (about 90º) the night would be very long, about half of the orbit period about six months.

Based on this presentation we can answer the question

The Sumo exposition from highest to lowest is

0º - 23.5º - 45º - 90º

3 0

3 years ago

Which best describes longitudinal waves?

RUDIKE [14]

The right answer for the question that is being asked and shown above is that: "A. Compressions and rarefactions make up longitudinal waves, which can only travel in matter." The statement that best describes longitudinal waves is that c<span>ompressions and rarefactions make up longitudinal waves, which can only travel in matter.</span>

3 0

3 years ago

I dont understand how to find the blanks

Amiraneli [1.4K]

The forces are:

$F_{grav} = 98,000 N$ , down

$F_{net} = 80,000 N$ , down

$F_{air}=18,000 N$ , up

Explanation:

We start by finding the force of gravity on the elephant, $F_{grav}$ , which is given by

$F_{grav}=mg$ (downward)

where

m = 10,000 kg is the mass of the elephant

$g=9.8 m/s^2$ is the acceleration of gravity

Substituting,

$F_{grav}=(10,000)(9.8)=98,000 N$

Now we know that the net acceleration of the elephant is

$a_{net}=8.0 m/s^2$ downward

We can now use Newton's second law:

$F_{net}=ma_{net}$

where $F_{net}$ is the net force on the elephant. Substituting, we find

$F_{net}=(10,000)(8.0)=80,000 N$

and it also acts downward, since it has the same direction as the acceleration.

Finally, we can write the net force on the elephant as

$F_{net}=F_{grav}-F_{air}$

where the force of gravity acts downward, while the air resistance ( $F_{air}$ acts upward. The net force also acts downward, so it has the same sign of gravity.