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andreev551 [17]
3 years ago
8

Question 1

Physics
2 answers:
Step2247 [10]3 years ago
7 0
1.<span> B. Turpentine
2. </span><span>C. Move on to another forested area.
3. </span><span>A. Starting a tree plantation
4. D. </span><span>Clear-cutting
</span>5. C. <span>Controlled burning</span>
brilliants [131]3 years ago
3 0

Answer 1

Correct answer is option B (Turpentine )

Explanation

tarpentine is a liquid which is made by the distillation of resin of trees like pine. It does not obtain from timber.

Answer 2

Correct Answer is C  (Move on to another forested area)

Explanation

When areas were deforested during the early Renaissance people Move on to another forested area.

Answer 3

Correct answer is  A  (Starting a tree plantation)

Explanation

Every year due to deforestation we lost timber trees in large amount. Timber can be renewed by starting a tree plantation of timber.

Answer 4

Correct answer is ( Clear-cutting )

Explanation

clear cutting is the most common method of tree harvesting for an even-aged forest stand. But clear cutting affect water cycle, trees hold,wildlife and atmosphere

Answer 5

Correct answer is C (Controlled burning)

Explanation

controlled burning is fire-management methods which is used to reduce outbreaks of pests and diseases

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Observer A, who is at rest in the laboratory, is studying a particle that is moving through the laboratory at a speed of v=0.8c
Studentka2010 [4]

Answer:

30.96 m

Explanation:

If the particle has a lifetime of 129 ns as measured by observer A, and has a speed of 0.8c as measured by observer A, the distance between the markers will be:

d = v * Δt

v = 0.8*c = 0.8 * 3e8 = 2.4e8

Δt = ζ = 129 ns = 1.29e-7 s

d = 2.4e8 * 1.29e-7 = 30.96 m

This is the distance as measured by observer A.

3 0
3 years ago
How long must a current of 100mA flow so as to transfer a charge of 80 C? ​
defon

Answer:

800s

Explanation:

Q=It

where,

Q=80c

I =100MA=0.1A

t=?

Q=It

800=0.1×t

t=80×0.1

t=800s

6 0
3 years ago
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Near the surface of Earth an electric field points radially downward and has a magnitude of approximately 100 N/C. What charge (
pentagon [3]

Answer:

q=2.997\times 10^{-4}C

Sign-Negative

Explanation:

We are given that

Electric field =E=100NC^{-1} (Radially downward)

Acceleration=0.19 ms^{-2}(Upward)

Mass of charge=3 g=3\times 10^{-3}kg

1kg=1000g

We have to find the magnitude and sign of  charge would have to be placed on a penny .

By newton's second law

\sum F_y=ma

\sum F_y=qE-mg

Substitute the values then we get

qE-mg=ma

Substitute the values then we get

q(100)-3\times 10^{-3}(9.8)=3\times 10^{-3}(0.19)

100q-29.4\times 10^{-3}=0.57\times 10^{-3}

100q=0.57\times 10^{-3}+29.4\times 10^{-3}=29.97\times 10^{-3}

q=\frac{29.97\times 10^{-3}}{100}

q=2.997\times 10^{-4}C

Sign of charge =Negative

Because electric force acting  in opposite direction of electric field therefore,charge on penny will be negative.

4 0
3 years ago
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