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Sergeu [11.5K]
3 years ago
8

A neutron has

Physics
2 answers:
zavuch27 [327]3 years ago
6 0

Answer:

D

Explanation:

a neutron does not have a positive nor negative charge it remains neutral

Bad White [126]3 years ago
6 0
A neutron had neither a positive or negative charge so the answer is D
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A student has a thin copper beaker containing 100 g of a pure metal in the solid state. The metal is at 215°C, its exact melting
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Answer:

The metal will melt but their will be no change in temperature.

Explanation:

The metal is at its melting temperature which means it is still in solid phase but have to cross the enthalpy of its condensation at this same temperature to convert into liquid phase.

<u>On supplying heat, the metal's temperature will not change as the heat will be required as enthalpy of condensation to melt the solid to liquid at the melting temperature.</u>

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Yes this is indeed true
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A straight wire of length 0.53 m carries a conventional current of 0.2 amperes. What is the magnitude of the magnetic field made
olga55 [171]

Explanation:

It is given that,

Length of wire, l = 0.53 m

Current, I = 0.2 A

(1.) Approximate formula:

We need to find the magnitude of the magnetic field made by the current at a location 2.0 cm from the wire, r = 2 cm = 0.02 m

The formula for magnetic field at some distance from the wire is given by :

B=\dfrac{\mu_oI}{2\pi r}

B=\dfrac{4\pi \times 10^{-7}\times 0.2\ A}{2\pi \times 0.02\ m}

B = 0.000002 T

B=10^{-5}\ T

(2) Exact formula:

B=\dfrac{\mu_oI}{2\pi r}\dfrac{l}{\sqrt{l^2+4r^2} }

B=\dfrac{\mu_o\times 0.2\ A}{2\pi \times 0.02\ m}\times \dfrac{0.53\ m}{\sqrt{(0.53\ m)^2+4(0.02\ m)^2} }

B = 0.00000199 T

or

B = 0.000002 T

Hence, this is the required solution.

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3 years ago
In pushing a heavy box across the floor, is the force you need to apply to start the box moving greater than, less than, or the
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Answer:

Explanation:

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Friction force is directly related to the weight of the box as the friction force is

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f_r=\mu N

N=mg

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3 years ago
A block weighing 15N rest on a flat surface and a horizontal force of 3N is exerted on it. Determine the frictional force on the
Ipatiy [6.2K]

The answer you are looking for is 3.0N

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