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Vlada [557]
3 years ago
7

How many protons are in an atom of copper?

Physics
2 answers:
denis-greek [22]3 years ago
5 0

Answer:

Atomic number of copper is 29. The atomic number of an atom is determined by the number of protons in the nucleus. Therefore, there are 29 protons in an atom of copper. In a neutral atom, there are equal number of protons and electrons. Therefore, there are 29 electrons in a copper atom. Mass number of copper is 64.

Number of protons + Number of neutrons = mass number.

Therefore, number of neutrons = 63 -29 = 35

baherus [9]3 years ago
3 0

Answer: Copper (Cu)

Neutrons‎: ‎35  Electrons‎: ‎29

Protons‎: ‎29 Atomic Number‎: ‎29

Explanation:

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Latent heat of fusion refers to which changes of state?
raketka [301]

The latent heat of fusion refers to the solid to liquid or liquid to solid states.

Answer: Option C

<u>Explanation: </u>

It is known that the inter conversion process from the states of solid to liquid is referred as fusion. So, for these conversions, the external energy in the heat form should be supplied to solid.

This external energy should be greater than the latent heat of solid in order to successfully break the bonds to form liquid. So the change in the enthalpy of the reaction while conversion from solids to liquids are termed as latent heats of fusion.

Even the inter-conversion from liquid to solid state will undergo change in enthalpy where the heat will be released and that is termed as latent heats of solidification. It is found that latent heat of solidification is equal in magnitude but opposite in direction with the latent heats of fusion.

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3 years ago
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Sidana [21]
Are there choices or no??
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3 years ago
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3 0
2 years ago
Starting from rest, a solid sphere rolls without slipping down an incline plane. At the bottom of the incline, what does the ang
Marrrta [24]

Answer:

2/R*sqrt (g*s*sin(θ)) = w

Explanation:

Assume:

- The cylinder with mass m

- The radius of cylinder R

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- The angular speed at bottom of slope w

- The slope of the plane θ

- Frictionless surface.

Solution:

- Using energy principle at top and bottom of the slope. The exchange of gravitational potential energy at height h, and kinetic energy at the bottom of slope.

                                         ΔPE = ΔKE

- The change in gravitational potential energy is given as m*g*h.

- The kinetic energy of the cylinder at the bottom is given as rotational motion: 0.5*I*w^2

- Where I is the moment of inertia of the cylinder I = 0.5*m*R^2

We have:

                              m*g*s*sin(θ) = 0.25*m*R^2*w^2

                              2/R*sqrt (g*s*sin(θ)) = w

- The angular velocity depends on plane geometry θ , distance travelled down slope s, Radius of the cylinder R , and gravitational acceleration g

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3 years ago
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Chemical energy (calories) is converted by your body walking on the surface into mechanical/kinetic energy
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2 years ago
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