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Katen [24]
3 years ago
14

Consider the following tasks: A. Draw a closed curve around the system. B. Identify "the system" and "the environment." C. Draw

a picture of the situation. Which of these are steps used to identify the forces acting on an object? 1. A only 2. B only 3. C only 4. A, B, and C 5. None of them
Physics
1 answer:
Soloha48 [4]3 years ago
8 0

Answer:

Explanation:

To identify forces acting on an object

1. Draw a closed curve around the system.

2.Identify "the system" and "the environment."

3. Draw a picture of the situation. Which of these are steps used to identify the forces acting on an object?

All of these are correct.

A close loop doesn't allow external forces to act on the system and this only allows the the forces on the object to act alone.

Drawing the free body diagram will show the forces acting on the body.

Also, isolating the system from the environment so that it won't be affected by external forces or resistance

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Looking at the examples below and select the change in matter that is an example of a physical change A Ice Melting B leaves cha
Gnesinka [82]

Answer:

- As an ice cube melts, its shape changes as it acquires the ability to flow. ... A physical change is a change to a sample of matter in which some ... The salt may be regained by boiling off the water, leaving the salt ... The resulting mixture is a solution with a pale green color. ... Answer b: chemical change.

Explanation:

8 0
3 years ago
Are u god tell me u have to tell me are u a god
Allushta [10]

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7 0
3 years ago
Suppose you wanted to use a non-reflecting layer for radar waves to make an aircraft invisible. What would the thickness of the
Xelga [282]

Answer:

the thickness of the film for destructive interference is 1 cm

Explanation:

We can assume that the radar wave penetrates the layer and is reflected in the inner part of it, giving rise to an interference phenomenon of the two reflected rays, we must be careful that the ray has a phase change when

* the wave passes from the air to the film with a higher refractive index

* the wavelength inside the film changes by the refractive index

         λ = λ₀ / n

so the ratio for destructive interference is

            2 n t = m λ

            t = m λ / 2n

indicate that the wavelength λ = 2 cm, suppose that the interference occurs for m = 1, therefore it is thickness

            t = 1 2/2 n

            t = 1 / n

where n is the index of refraction of the anti-reflective layer. As they tell us not to take into account the change in wavelength when penetrating the film n = 1

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3 years ago
The pressure exerted by a column of liquid is equal to the product of the height of the column times the gravitational constant
almond37 [142]

Answer:

The column of methanol is = 12.27 m high

Explanation:

The pressure of mercury  (p) = ghd,................... equation 1

Where g = acceleration due to gravity, h= height, d = density.

d = 13.6 g/ml convert to kg/m³ = 13.6 g/ml(1000 (kg/m³)/(g/ml))

d =13600 kg/m³., h= 713mm = 713/1000 = 0.713 m., g= 9.80 m/s²

Substituting these values into equation 1,

P = 13600 × 0.713 × 9.8 = 95028.64 N/m².

If the pressure of the mercury supports the pressure exerted by the methanol

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making h the subject of formula,

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Where p = 95028.64 N/m², g = 9.8 m/s², d = 0.79 g/ml = (0.79 × 1000) kg/m³

d = 790 kg/m³.

Substituting these values into equation 2

h = 95028.64/(9.8×790)

h = 95028.64/7742

h = 12.27 m.

The column of methanol is = 12.27 m high

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motikmotik

a self contained living thing is called adaptataion is true

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2 years ago
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