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3 years ago

The difference between tension and traction?

1 answer:

3 0

The object may not end up in motion - either if tension is balanced in opposite directions, or if traction is greater than tension.

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Where do you think most of the water

ddd [48]

Probably path of Little Rock’s because the big rocks won’t let water in :)

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3 years ago

It is difficult to observe 1-nanometer, 1 millimeter, and 100 meter radiation with ground-based telescopes. What are the reasons

Paul [167]

Explanation:

1 nano-meter radiations are very difficult to observe from the ground based telescope because most of this range of radiation is absorbed through ozone layer. A very small amount of this range escape out of the ozone layer. This remaining few radiations are very difficult to track from the ground base telescope.

1 millimeter range of radiation comprises of infrared. It has range from 710 nano-meter to 1 millimeter. Infrared radiation can be easily absorbed from water and carbon di oxide molecules present in the atmosphere. So, it is absorbed by water and carbon di oxide molecules in the atmosphere. Thus, it is difficult to observe from the ground based telescope.

100 meter radiations are are radio-waves. The charged particle present in the uppermost layer of atmosphere absorbs these radio waves. So, these waves are absorbed by charged particle in the upper atmosphere. Thus, it is difficult to observe from the ground based telescope.

7 0

4 years ago

17. In which layer does mantle convection occur?

Anarel [89]

Answer:

D. Asthenosphere

Explanation:

The asthenosphere is relatively plastic part of the mantle which underlies the brittle lithosphere. In the asthenosphere, it is generally believed that the rocks are in ductile state and easily moves. It is the site of convection within the earth. In mantle convection, hot and light materials rises and keeps moving into upper crustal levels till they solidify. Here also, cold and denser materials sinks deeper till they turn to melt. This differences in temperature and density sets up a convective cell within the mantle. Several convective cells are in the mantle.

8 0

4 years ago

Tarzan, who weighs 825 N, swings from a cliff at the end of a 19.7 m vine that hangs from a high tree limb and initially makes a

kodGreya [7K]

Answer:

a) T = (281.47 i ^ + 714.56 j ^) N , b) F_net = (281.47 i ^ - 110.44 j ^) N ,

c) F = 281.70 N, d) θ = 338.58º , e) a = 3,588 m / s² , f) θ = 201.45º

Explanation:

For this exercise we will use Newton's second law on each axis

X axis

-Tₓ = m aₓ

Y Axisy

$T_{y}$ –W = m a_{y}

Let's use trigonometry to find the components of force

sin 21.5 = Tₓ / T

cos 21.5 = T_{y} / T

Tₓ = T sin 21.5

T_{y} = T cos 21.5

Tₓ = 768 sin 21.5 = 281.47 N

T_{y} = 768 cos 21.5 = 714.56 N

a) the force of the rope on Tarzan is

T = (281.47 i ^ + 714.56 j ^) N

b) The net force is the subtraction of the tension minus the weight of Tarzan

Y Axis F_net = 714.56 - 825 = -110.44 N

F_net = (281.47 i ^ - 110.44 j ^) N

c) Let's use Pythagoras' theorem

F = √ (Fₓ² + T_{y}²)

F = √ (281.47² + 110.44²)

F = 281.70 N

d) Let's use trigonometry

tan θ = F_{y} / Fₓ

θ = tan⁻¹ F_{y} / Fₓ

θ = tan⁻¹ (-110.44 / 281.47)

θ = -21.42º

This angle is average clockwise, for counterclockwise measurement

θ = 360 - 21.42

θ = 338.58º

Acceleration

X axis

Tₓ = m aₓ

aₓ = Tₓ / m

The mass of Tarzan is

m = W / g

m = 825 / 9.8 = 84.18 kg

aₓ = 281.47 / 84.18

aₓ = -3.34 m / s2

Y Axis

T_{y}-W = m a_{y}

a_{y} = (T_{y} -W) / m

a_{y} = (714.56-825) / 84.18

a_{y} = - 1,312 m / s²

Acceleration Module

a = √ aₓ² + a_{y}²

a = √ (3.34² +1.312²)

a = 3,588 m / s²

The angle

θ = tan⁻¹ a_{y} / aₓ

θ = tan⁻¹ (-1312 / -3.34)

θ = 21.45º

Notice that the two components of the acceleration are negative, so the angle is in the third quadrant, to measure from the x-axis

θ = 180 + 21.45

θ = 201.45º

3 0

3 years ago

Name on contact force and one field force acting on you right now

kati45 [8]

Answer:

Contact forces are forces that require the actual contact (touching) of two pieces of matter. There are a variety of contact forces. A very common one is friction. Anytime that two surfaces are in contact with one another, there is friction between the two surfaces. A field force is a force that works at a distance. No touching is required. Gravity is a good example of a field force, because it works whether or not an object is touching something or touching nothing at all.

8 0

3 years ago