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lys-0071 [83]
3 years ago
9

List any four uses of electricity in our daily life​

Physics
2 answers:
Travka [436]3 years ago
7 0

Answer:

Heating.

Cooling.

Water Heater.

Lights.

Explanation:

TEA [102]3 years ago
7 0
Lights
Heating
Fans
Electronics
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By what factor must we increase the amplitude of vibration of an object at the end of a spring in order to double its maximum sp
strojnjashka [21]

Answer:

A'=2A

Explanation:

According to the law of conservation of energy, the total energy of the system can be expresed as the sum of the potential energy and kinetic energy:

E=U+K=\frac{kA^2}{2}\\E=\frac{kx^2}{2}+\frac{mv^2}{2}=\frac{kA^2}{2}

When the spring is in its equilibrium position, that is x=0, the object speed its maximum. So, we have:

\frac{k(0)^2}{2}+\frac{mv_{max}^2}{2}=\frac{kA^2}{2}\\A^2=\frac{mv_{max}^2}{k}\\A=\sqrt{\frac{mv_{max}^2}{k}}

In order to double its maximum speed, that is v'{max}=2v_{max}. We have:

A'=\sqrt{\frac{m(v'_{max})^2}{k}}\\A'=\sqrt{\frac{m(2v_{max})^2}{k}}\\A'=\sqrt{\frac{4mv_{max}^2}{k}}\\A'=2\sqrt{\frac{mv_{max}^2}{k}}\\A'=2A

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3 years ago
The transfer of thermal energy is a major aspect of which branch of physics?
scZoUnD [109]
Mechanics is dealing with forces that are effecting some body, electrostatics is about electrical fields of not moving bodies, and quantum mechanics is dealing with quantum states of atoms. 

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Answer:

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Why is information about comets, asteroids, and meteoroids important for understanding the development of the solar system?
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The density of gold is 19.3 g/cm^3. what is the mass of 24 cm^3 of gold?
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Density = 19.3 g/cm³

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3 years ago
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