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xeze [42]
3 years ago
10

Which is the intensity of the softest sounds that most humans can hear?

Geography
1 answer:
iVinArrow [24]3 years ago
7 0

10 dB is the lowest sound intensity a human can hear..

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A basket has a mass of 5.5 kg. Find the magnitude of the normal force if the basket is at rest on a ramp inclined above the hori
Ivenika [448]
The free body diagram consists of:

1) Weight force, which is a vertical arrow downward

2) A Normal force that is perpendicular to the ramp.

The Normal force can be decomposed in a vertical component and an horizontal component.

The vertical component, Ny,  must equal the weight force, due to equilibrium (rest) condiition =>

Ny = weight = m*g = 5.5kg*9.8m/s^2 = 53.9 N

By geometry the vertical component of the Normal force, Ny is such that

cos (angle) = N / Ny => N = Ny * cos(angle)

=> N = 53.9N * cos(angle)

Now use that equation for each option:

a) 0 ° => N = 53.9N * cos(0) = 53.9N

b) 12° => N = 53.9 * cos(12) = 52.7N

c) 25° => N = 53.9 * cos(25) = 48.9N

d) 45° => N = 53.9 * cos(45) = 38.1N
7 0
4 years ago
Explain how the government of Canada and the United States are different?
Ber [7]

Question:

Explain how the government of Canada and the United States are different?

Answer:

One major difference is that the United States dosent have a official langauage, but Canda has 2.

7 0
3 years ago
Read 2 more answers
Is the prime meridian split in half horizontally or vertically?
DochEvi [55]
ANSWER: The prime meridian is split Vertically
8 0
4 years ago
Identify by name the two tectonic plates labeled on the map above that are located directly on each side of
coldgirl [10]
The Earthquake epicenter is located next to the Japanese islands, as it is seen and labeled on the picture.

The  tectonic plate that is to the right and below the epicenter is the Pacific Plate- this is easy to see on the picture.

The plate to the left is a little more confusing, but if you look closely, it is the Okhotsk plate- you know this because there are no boundaries between the name of the plate and the epicenter.
3 0
3 years ago
Which one of the following is not a layer of the atmosphere
Dominik [7]

Name: Troposphere

Temperature: normal to 0 degrees temperature

air pressure: decreases with increasing altitude

composition: clouds and weather, Oxygen and Nitrogen

altitude:10-15km thick above the Earth’s surface

special attribute: lowest layer

 

Name: Stratosphere

Temperature: 0 degrees Celsius

air pressure: decreases with increasing altitude

composition: Ozone layer

altitude: 11 – 48 km above the Earth’s surface

special attribute: Ozone layer is found which absorbs UV rays from the Sun, second layer

 

Name: Mesosphere

Temperature: -90 degrees Celsius

air pressure: decreases with increasing altitude

composition:atmosphere is rarefied and thick enough to delay the fall of the meteors

altitude: 50-60km Earth’s surface

special attribute: very thin layered

 

Name: Thermosphere

Temperature: Thousand degrees Celsius

air pressure: decreases with increasing altitude

composition: gases are stratified

altitude: 60-80km above the Earth’s surface

special attribute: Auroras and satellites occurs in this layer

 

Name: Ionosphere

Temperature: negative Thousand degrees Celsius

air pressure: decreases with increasing altitude

composition: abundant layers of electrons and ionized atoms and molecules

altitude:80-465km above the Earth’s surface

special attribute: makes radio communication possible

 

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7 0
4 years ago
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