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Fittoniya [83]
3 years ago
14

Coal is considered to be a non-renewable energy source. Which of the following statements is correct? a. Coal is a scarce resour

ce. b. Coal is an unlimited resource. c. Coal is a non-scarce resource. d. Coal is not a resource.
Physics
1 answer:
aleksley [76]3 years ago
4 0
C) Coal is a non-scarce source
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50
kaheart [24]

Answer: el pepe

Explanation:

8 0
2 years ago
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As a pole of a 2nd-order discrete-time system moves away from the origin in the z-plane, while its phase remains constant, the d
Rudik [331]

Answer:

False

Explanation:

When the location of the poles changes in the z-plane, the natural or resonant frequency (ω₀) changes which in turn changes the damped frequency (ωd) of the system.

As the poles of a 2nd-order discrete-time system moves away from the origin then natural frequency (ω₀) increases, which in turn increases damped oscillation frequency (ωd) of the system.

ωd = ω₀√(1 - ζ)

Where ζ is called damping ratio.

For small value of ζ

ωd ≈ ω₀

4 0
2 years ago
B. Assuming the acceleration is still -9.81 m/s2, what is the instantaneous velocity of the
goblinko [34]

We have that the instantaneous velocity of the shuttlecock when it hits the ground is

V_{int}=\sqrt{U^2+19.6H}

From the question we are told

Assuming the acceleration is still -9.81 m/s2, what is the instantaneous velocity of the

shuttlecock when it hits the ground? Show your work below.

Generally the equation for acceleration  is mathematically given as

a=v \frac{dv}{dx}\\\\\Therefore\\\\\2ah=v^2-u^2

Where

acceleration is still -9.81 m/s2,

Hence,

V^2-U^2=2(-9.81)*-H

Therefore

V_{int}=\sqrt{U^2+19.6H}

For more information on this visit

brainly.com/question/12319416?referrer=searchResults

7 0
2 years ago
What is primary sex organs called
Ostrovityanka [42]
The primary sex organs for men are called testes and ovaries for the women. They produce sex cells called gametes and they secrete sex hormones.
6 0
3 years ago
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A 4.0 kg bird has 8.0 J of kinetic energy. How fast is it flying?
Lady_Fox [76]

Explanation:

formula is k.e 1/2mv^2

4 0
3 years ago
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