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4 years ago

How many wolves are in the Southeast US

Physics

2 answers:

charle [14.2K]4 years ago

7 0

Approximately 100-120 wolves

gavmur [86]4 years ago

3 0

I researched this, it is approximately 100-120

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A rod of length 20 cm has two beads attached to its ends. The rod with beads starts rotating from rest. If the beads are to have

exis [7]

Answer:

$\alpha=28.57\frac{rad}{s^2}$

Explanation:

We use the following rotational kinematic equation to calculate the angular acceleration of the rod:

$\omega_f=\omega_0+\alpha t$

Here $\omega_f$ is the final angular speed, $\omega_0\\$ is the initial angular speed and $\alpha$ is the angular acceleration. The rod starts rotating from rest ( $\omega_0=0$ ):

$\alpha=\frac{\omega_f}{t}(1)$

Recall that the angular speed is defined in function of the tangential speed (v) and the radius (r) of the circular motion:

$w_f=\frac{v_f}{r}(2)$

In this case the radius is given by $r=\frac{20*10^{-2}m}{2}=0.1m$ . Replacing (2) in (1):

$\alpha=\frac{v_f}{rt}\\\alpha=\frac{20\frac{m}{s}}{(0.1m)7s}\\\alpha=28.57\frac{rad}{s^2}$

5 0

3 years ago

Suppose an elephant has a mass of 2800 kg. show answer No Attempt How fast, in meters per second, does the elephant need to move

Mumz [18]

Answer:

The speed of elephant must be 1.4 m/s.

Explanation:

Mass of the elephant, M = 2800 kg

Mass of sprinter, m = 77 kg

Speed of sprinter, v = 8.5 m/s

It is required to find the speed of elephant to have the same kinetic energy as that of sprinter. So,

$K_e=K_s\\\\\dfrac{1}{2}MV^2=\dfrac{1}{2}mv^2\\\\MV^2=mv^2\\\\V=\sqrt{\dfrac{mv^2}{M}} \\\\V=\sqrt{\dfrac{77\times 8.5^2}{2800}} \\\\V=1.40\ m/s$

So, the speed of elephant must be 1.4 m/s.

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3 years ago

Write a hypothesis about the use of an object’s physical characteristics to determine its density. Use the format "if . . . then

Ad libitum [116K]

Answer:

If an object has a high density then the molicules making up that object are closly packed togeather. Because of this, objects with a higher density will have more mass than objects of the same size that have a lesser density.

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3 years ago

Which of the following statements is true about isotopes? Question options: The number of protons always equals the number of ne

arlik [135]

The number of protons always equals the number of neutrons in all isotopes: false

Different isotopes for the same element always have the same number of protons: True

The number of protons never equals the number of neutrons in an isotope: False (example: He)

Different isotopes for the same element will always have the same numbers of neutrons: false

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4 years ago

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A Describe and explain what

melomori [17]

Answer:

The extension is directly proportional to the force applied.

ex: if the force is doubled, the extension doubles. This works until the limit of proportionality is exceeded.

Hope this helped~

Explanation:

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2 years ago

Read 2 more answers