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rjkz [21]
3 years ago
15

Which molecule has charges that are free to move around?

Physics
1 answer:
borishaifa [10]3 years ago
6 0
A polar molecules have charges that are free to move around
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Which statement describes the interaction between the north and south poles of two magnets?(1 point)
miskamm [114]

Answer:

The south pole of one magnet attracts the north pole of the other magnet.

Explanation:

Opposites attract; likes repel :)

5 0
2 years ago
A copper wire has a radius of 3.5 mm. When forces of a certain equal magnitude but opposite directions are applied to the ends o
denpristay [2]

Answer:

The tensile stress on the wire is 550 MPa.

Explanation:

Given;

Radius of copper wire, R = 3.5 mm

extension of the copper wire, e =  5.0×10⁻³ L

L is the original length of the copper wire,

Young's modulus for copper, Y =  11×10¹⁰Pa.

Young's modulus, Y is given as the ratio of tensile stress to tensile strain, measured in the same unit as Young's modulus.

Y =\frac{Tensile \ stress}{Tensile \ strain} \\\\Tensile \ stress = Y*Tensile \ strain\\\\But, Tensile \ strain = \frac{extension}{original \ Length} = \frac{5.0*10^{-3} L}{L} = 5.0*10^{-3}\\\\Tensile \ stress = 11*10^{10} *5.0*10^{-3} \ = 550*10^6 \ Pa

Therefore, the tensile stress on the wire is 550 MPa.

8 0
3 years ago
A sign is hung between two cables. If the sign weighs 350 N, what is the tension (in N) in each cable?
Gre4nikov [31]

Answer:

Tension in each cable = 175 N

Explanation:

Given:

Number of cables = 2

Weight of sign board(T) = 350 N

Find:

Tension in each cable

Computation:

We know that,

T1 = T2

So,

T1 + T2 = T

T1 + T2 = 350

T1 + T1 = 350

T1 = 175

Tension in each cable = 175 N

3 0
3 years ago
This strand of evidence helped to provide a link in the evolution of whales from land mammals on 4 legs to a sea mammal with fin
Vitek1552 [10]

Answer:

D. DNA

Explanation:

Genetics can be defined as the scientific study of hereditary in living organisms such as humans, animals and plants.

Heredity refers to the transfer of traits (specific characteristics) from the parent of a living organism to her offspring through sexual reproduction or asexual production. Some examples of hereditary traits are dimples, tongue rolling, baldness, handedness, freckles, curly hair, color blindness, height, etc.

Deoxyribonucleic acid (DNA) is a strand of evidence which helped to provide a link in the evolution of whales from land mammals on 4 legs to a sea mammal with fins.

Basically, deoxyribonucleic acid (DNA) is an organic complex-molecular structure found in all living organisms. It comprises of genes and is essentially the foundation block of all living organisms such as humans, animals and plants.

4 0
2 years ago
Reverse faults are fractures that occur from compression forces that push the Earth's crust together. The movement, indicated by
kolezko [41]
C) for every action there is an equal and opposite reaction. 
8 0
3 years ago
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