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vagabundo [1.1K]
3 years ago
5

The city of San Francisco reported more missing dogs the week before a massive earthquake than any other week of the year. There

fore, this is factual evidence that dogs can sense impending danger.
Physics
2 answers:
navik [9.2K]3 years ago
5 0

Answer:

An earthquake constitutes the motion of seismic waves underneath the earth's surface, which humans can not sense. But, these waves generate infrasonic noise–a sound with a frequency lower than 20 Hertz and Dogs sense that something strange is happening, so they begin to be peculiar.

Explanation:

There are many observations on how dogs often begin to behave unusually right before an earthquake. An earthquake constitutes the motion of seismic waves underneath the earth's surface, which humans can not sense. But, these waves generate infrasonic noise–a sound with a frequency lower than 20 Hertz and Dogs sense that something strange is happening, so they begin to be peculiar.

Ghella [55]3 years ago
3 0
This is an example of the logic fallacy called " post hoc ergo propter hoc", meaning roughly "after that, therefore caused by that". Another example: 99.99% of the people arrested for public drunkenness in the US last month had ice in their last three mixed drinks. Therefore, this is factual evidence that ice makes people drunk.
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Answer:

the law of motion

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What is being transferred as you do work?<br> A. Energy<br> B. Power<br> C. Heat<br> D. Strength
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\huge\bold{\purple{\bold{⚡A. Energy⚡}}}

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When a force causes a body to move, work is done on the object by the force. Work is the measure of the energy transfer when a force 'F' moves an object through a distance 'd'. So we say that energy is transferred from one energy store to another when work is done, and therefore, energy transferred = work done.

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3 years ago
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7. A 50 kg pole vaulter running at 10 m/s vaults over the bar. Her speed when she is over the bar is 1.0 m/s. Neglect air resist
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PLEASE PROVIDE AN EXPLANATION.<br><br> THANKS!!!
ziro4ka [17]

Answer:

(a) A = 0.0800 m, λ = 20.9 m, f = 11.9 Hz

(b) 250 m/s

(c) 1250 N

(d) Positive x-direction

(e) 6.00 m/s

(f) 0.0365 m

Explanation:

(a) The standard form of the wave is:

y = A cos ((2πf) t ± (2π/λ) x)

where A is the amplitude, f is the frequency, and λ is the wavelength.

If the x term has a positive coefficient, the wave moves to the left.

If the x term has a negative coefficient, the wave moves to the right.

Therefore:

A = 0.0800 m

2π/λ = 0.300 m⁻¹

λ = 20.9 m

2πf = 75.0 rad/s

f = 11.9 Hz

(b) Velocity is wavelength times frequency.

v = λf

v = (20.9 m) (11.9 Hz)

v = 250 m/s

(c) The tension is:

T = v²ρ

where ρ is the mass per unit length.

T = (250 m/s)² (0.0200 kg/m)

T = 1250 N

(d) The x term has a negative coefficient, so the wave moves to the right (positive x-direction).

(e) The maximum transverse speed is Aω.

(0.0800 m) (75.0 rad/s)

6.00 m/s

(f) Plug in the values and find y.

y = (0.0800 m) cos((75.0 rad/s) (2.00 s) − (0.300 m⁻¹) (1.00 m))

y = 0.0365 m

8 0
2 years ago
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