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3 years ago

PLEASE HELP WILL GIVE BRANLIEST IF CORRECT

Physics

2 answers:

Lerok [7]3 years ago

4 0

Answer:

Explanation:

X would be armature.

Y is the brush because when z moves the circuits, the brush moves with it

the commutator helps turn the circuits, so that would be z.

coldgirl [10]3 years ago

3 0

Answer:

Explanation:

z: commutator
y: brush
x: armature

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1. A 14-cm tall object is placed 26 cm from a converging lens that has a focal length of 13 cm.

AURORKA [14]

Answer:

a) Please find attached the required drawing of light passing through the lens

By the use of similar triangles;

The image distance from the lens = 26 cm

The height of the image = 14 cm

c) The image distance from the lens = 26 cm

The height of the image = 14 cm

Explanation:

Question;

a) Determine the image distance and the height of the image

b) Calculate the image position and height

The given parameters are;

The height of the object, h = 14 cm

The distance of the object from the mirror, u = 26 cm

The focal length of the mirror, f = 13 cm

The location of the object = 2 × The focal length

Therefore, given that the center of curvature ≈ 2 × The focal length, we have;

The location of the object ≈ The center of curvature of the lens

The diagram of the object, lens and image created with MS Visio is attached

From the diagram, it can be observed, using similar triangles, that the image distance from the lens = The object distance from the lens = 26 m

The height of the image = The height of the object - 14 cm

b) The lens equation is used for finding the image distance from the lens as follows;

$\dfrac{1}{u} + \dfrac{1}{v} = \dfrac{1}{f}$

Where;

v = The image distance from the lens

We get;

$v = \dfrac{u \times f}{u - f}$

Therefore;

$v = \dfrac{26 \times 13}{26 - 13} = \dfrac{26 \times 13}{13} = 26$

The distance of the image from the lens, v = 26 cm

The magnification, M =v/u

∴ M = 26/26 = 1, therefore, the object and the image are the same size

Therefore;

The height of the image = The height of the object = 14 cm.

5 0

3 years ago

An acetal polymer block is fixed to the rigid plates at its top and bottom surfaces. If the top plate displaces 2 mm horizontall

Taya2010 [7]

Answer:

The shear modulus of the polymer is 5 MPa

Solution:

As per the question:

displacement of the top plate, d = 2 mm = 0.002 m

Horizontal Force, P = 2 kN = 2000 N

Width of the block, w = 100 mm = 0.1 m

By small angle analysis:

Angle, $\gamma = \frac{2}{200} = 0.01 rad$

Now,

Stress, $\tau$ = $\frac{P}{Area} = \frac{2000}{0.4\times 0.1} = 50000 Pa$

$G = \frac{\tau}{\gamma} = \frac{50000}{0.01} = 5 MPa$

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3 years ago

The unit for acceleration is always

Mazyrski [523]

Explanation:

Because acceleration is velocity in m/s divided by time in s, the SI units for acceleration are m/s2, meters per second squared or meters per second per second, which literally means by how many meters per second the velocity changes every second. ... The quicker you turn, the greater the acceleration.

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Which statement best describes the difference between acceleration and velocity?

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C. is the answer because acceleration is the change in velocity in time while velocity is speed with a direction

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Use free fall in a sentance

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