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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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HELP!!! I MIGHT FAIL THE 6th GRADE IF I DON'T GET HELP!!!! The southern United States experiences periodic occurrences of severe
VikaD [51]

Answer:

La Niña, because the jet stream is displaced northwards

Explanation:

La Nina is known to be a cool phase that affects the average ocean temperature. During this period the surface wind becomes stronger and there is lesser rainfall over the areas of the central tropical Pacific to which the Southern United States belongs.

Hence, when the southern United States experiences periodic occurrences of severe cold and drought conditions, the weather phenomenon most likely causes this and why is "La Niña, because the jet stream is displaced northwards."

3 0
3 years ago
An aluminum calorimeter with a mass of 100 g contains 250 g of water. The calorimeter and water are in thermal equilibrium at 10
Nadya [2.5K]

Answer:

1822.14 J/kg C

Explanation:

Mass of aluminum  = 0.100 kg

Mass of Water = 0.250 kg

Mass of copper = 0.300 kg

Mass of unknown object = 0.70 kg

Initial temperature of Aluminum = 10 C

Initial  temperature  of water = 10 C

Initial temperature of copper = 30 C

Initial temperature of = 100 C

Final temperature of all substances = 20 C

Change in temperature of each  of them Aluminum, water , copper and unknown material  respectively = 10 C , 10 C , -10 C, -80 C respectively

Specific heat of  each  of them Aluminum, water , copper and unknown material  respectively = 900,4186,387 and c respectively.

Heat gained by aluminum and water = (0.1)(900)(10) + (0.250)(4186)(10) = 11365 j

heat lost by copper and unknown  material  =(0.3)(387)(-10) = -1161

heat lost by unknown  material  =  (0.070)(c)(-80) = -5.6 c

Now solve for c using the calorimetry principle.

Heat lost + Heat gained = 0

⇒ -5.6 c = -11365 - (-1161) = -10204 j

Specific heat of unknown material = - 10204 / -5.6

                                                         = 1822.14  j/kg C  

b) Material having a specific heat of 1800 j /kg C is

Polyurethane elastomer.

4 0
3 years ago
A fiber-optic cable (n = 1.53) is submerged in water (n = 1.33). Predict whether light will be refracted or whether it will unde
Aleks [24]
Total internal refraction occurs when a ray of light meets the following conditions. 
1. light falls from an optically dense material to a less dense material. 
2. The angle of incident in the denser media must be greater than the critical angle. 

In the case above the fiber-optic is optically denser than water. Since the light is incident to fiber-optic-water interface, then one condition is fulfilled.
Checking the other condition we carry out the calculation below;

n1sinФ1=n2sinФ2
where c ⇒critical angle  
1.53 sinc = 1.33 sin 90
sinc =0.86928
   c = 60.37° 

The angle of incident is (65°-70°) is greater than critical angle. 
With certainty, there would be no refraction. Total internal reflection would occur. 

7 0
4 years ago
A 10,000kg space ship is orbiting the moon with a radius of 25km from the ship to the center of the moon. It's tangential speed
galina1969 [7]

Answer:

False

Explanation:

ac = v^2/r

acceleration is not dependent on the mass of the orbiting object.

3 0
3 years ago
Cloudy nights are usually warm because​
almond37 [142]

Answer:

When you have a cloudy night, the clouds prevent heat from escaping through the atmosphere and into space.

The clouds act like a blanket and trap the heat it, and that is why every time you have a cloudy night, it is always warmer than a clear night.

5 0
3 years ago
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