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Eddi Din [679]
3 years ago
14

object is placed 15cm in front of a plane mirror. If the mirror is moved further 5cm away from the object and the image is​

Physics
2 answers:
4vir4ik [10]3 years ago
6 0
The object will be 20cm away because it was placed a further 5cm away from the mirror and 15 + 5 equals 20cm
solong [7]3 years ago
4 0

Answer:

The image will most likely be 20cm in front the mirror since the mirror was placed further 5cm.

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Resistance and resistivity are related by a:
kondor19780726 [428]

Answer: D

Explanation: Resistance of current in a wire is directly proportional to the length of the wire and inversely proportional to the cross - sectional area of the wire. That is,

R = (rho × L)/A

Where

L = length of the wire

A = cross sectional Area of the wire

rho = resistivity = proportionality constant which depends on the quality of the wire.

Therefore, Resistance and resistivity are related by a:

proportionality constant dependent on the identity of the material.

4 0
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What units would be used to describe the surface gravity of Mars?
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AU- astronautical units
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A sailor in a small sailboat encounters shifting winds. She sails 2.00 km east, then 3.50 km southeast, and then an additional d
Law Incorporation [45]

Answer:

Third displacement = 2.81 m which is 61.70° north of east.

Explanation:

   Let east represents positive x- axis and north represent positive y - axis. Horizontal component is i and vertical component is j.

  She sails 2 km east, displacement = 2 i

  Then 3.50 km southeast, means 3.5 km 315⁰ to + ve X axis

  Displacement = 3.5 cos 315 i + 3.5 sin 315 = 2.47 i - 2.47 j

  Let third displacement be x i + y j

  We have final displacement = 5.80 km east = 5.80 i

  From summation we have total displacement = 2 i + 2.47 i - 2.47 j + x i + y j

                                                                           = (4.47+x) i + (y - 2.47) j

  Comparing both , we have 4.47+x = 5.80

                                                        x = 1.33

                                                 y-2.47=0

                                                         y = 2.47 j

  So third displacement = 1.33 i + 2.47 j

  Magnitude of third displacement = \sqrt{1.33^2+2.47^2} =2.81m

  θ = tan⁻¹(2.47/1.33) = 61.70°

  So third displacement = 2.81 m which is 61.70° north of east.


7 0
3 years ago
What evidence would you observe if the law of conservation of mass is obeyed when mixing two solutions?​
Marianna [84]

Answer:

You should have noticed that the number of atoms in the reactants is the same as the number of atoms in the product. The number of atoms is conserved during the reaction. However, you will also see that the number of molecules in the reactants and products are not the same.

3 0
2 years ago
Sound waves are : a) Transverse and longitudinal b) Transverse c) Longitudinal
Olegator [25]

Answer:

a) Transverse and longitudinal

Explanation:

Depending on the medium in which the sound is traveling the wave can be longitudinal or transverse.

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When traveling in solids the wave takes the form of a transverse wave. Transverse waves leads to the formation of shear stresses in the solid.

8 0
3 years ago
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