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3 years ago

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Describe three agricultural practices that led to increased soil erosion and how they create the problem ?

1 answer:

Roman55 [17]3 years ago

3 0

Answer:

Describe three agricultural practices that led to increased soil erosion and how they create the problem?

Agricultural practices that increase the chances of erosion include Soil tillage, mowing, plowing, grazing e.t.c these exposes the soil and enables water run-off which allows erosion to take place

Explanation:

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After giving an intense performance, a confused and disoriented ﬂautist has wandered onto the motorway! They are playing a con

leva [86]

This is a Doppler effect. Generally, if you move to a frequency source, you would detect an increase in frequency and when you move away from a source you would detect a decrease.

For this question, before you pass them, you are actually approaching them, so you would hear a higher frequency than the constant 300 Hz they are playing at.

Using the condensed formula:

f ' = ((v <u>+</u> vd)/(v <u>+</u> vs)) * f

Where: vd = Velocity of the detector.
   vs = Velocity of the frequency source.
   v = Velocity of sound in air.
   f ' = Apparent frequency.
   f = Frequency of source.

v = 343 m/s, vd = detector = 27.8 m/s, vs = velocity of the source =0. (the flautists are not moving).
f = 300 Hz.

There would be an overall increase in frequency, so we maintain a plus at the numerator and a minus at the denominator.

f ' = ((v + vd)/(v - vs)) * f

f ' = ((343+ 27.8)/(343 - 0)) * 300
   = (370.8/343)* 300 = 324.3

Therefore frequency before passing them = 324.3 Hz.

Cheers.

4 0

3 years ago

An especially violent lightning bolt has an average current of 1.89 x 103 A lasting 0.133 s. How much charge is delivered to the

Rasek [7]

<h2> Charge = 25.9 $Ampsec^{-1}$ </h2>

Explanation:

Given,

The average current (I) = ${1.89} \times {103 A}$ and

Time period (T) = 0.133 s

The charge is calculated by multiplying the current to the time period.

Hence,

To find, the charge delivered to the ground by the lightning bolt(Q) = ?

By applying the formula of charge that is-

Charge(Q) = $Current(I) \times Time(T)$

∴ Charge(Q) = ${1.89} \times {103 A}$ $\times 0.133 s$

= 25.89111 $As^{-1}$

= 25.9 $As^{-}$

<h3>Thus, the charge of 25.9 $Ampsec^{-1}$ is delivered to the ground by the lightning bolt.</h3>

3 0

4 years ago

What effect will the following have on the inertia of a body if

Step2247 [10]

Explanation:

Inertia is the tendency of a body to remain at rest or to do nothing.

It is the resistance to any change in position of body.

When the force on a body increases, the inertia reduces

When the mass is reduced the inertia reduces

According to newton's first law or the law of inertia "an object will remain in its state of rest or of uniform motion unless if it is acted upon by an external force".

7 0

3 years ago

A(n) _____ is an area where an individual bird lives.

lapo4ka [179]

Bird habitats include various habitat types: from the human-related environment (e.g., building area, park, rural area, farmland, and pond) to the natural-related environment (e.g., forestland, grassland, river, stream, and coastland).

8 0

3 years ago

Read 2 more answers

Please answer the question for gravitational field attached in the image.

goblinko [34]

<u>We are given:</u>

Radius of Venus= 6 * 10⁶ m

Height above the planet's ground = 9.4 * 10⁶ m

Mass of Venus = 4.867 * 10²⁴ kg

<u>Finding the Gravitational Field:</u>

We first need to calculate the distance between the center of masses

<u>Distance between center of masses:</u>

Since the point is above the surface of Venus, the radius of Venus and the height will add

Distance between the center of masses = 9.4*10⁶ + 6 * 10⁶

Distance (r) = 15.4 * 10⁶ m

Now back to Gravitational field!

We know the formula for Gravitational Field:

g = GM / r² [<em>where g is the gravitational field, M is the mass of the planet, r is the distance between the center of masses and G is the gravitational constant</em>]

plugging the known values in the formula:

g = (6.67 * 10⁻¹¹ * 4.867 * 10²⁴) / (15.4*10⁶)² [G = 6.67*10⁻¹¹ Nm²/kg²]

g = (32.46 * 10¹³) / (237 * 10¹²)

g = (32.46 * 10¹³) / (23.7 * 10¹³)

g = 32.46/23.7 [the 10¹³ got cancelled out]

g = 1.367 N/kg² (or m/s²)

7 0

3 years ago