Answer:
712.5 J/g
5130000 J
618.421052632 cm³
Explanation:
= Specific heat = 0.46 J/g°C
= Change in temperature = (1300-25)°C
= Heat of fusion = 126 J/g
= Density =
Unit energy for melting and pouring is given by
The unit energy for melting and pouring is 712.5 J/g
Total energy is given by
The total energy of the process is 5130000 J
Volume is given by
The volume of the casting is 618.421052632 cm³
Answer: The chemical energy is converted to heat, light ,sound and kinematic movements.
Explanation:
An exploding firework is essentially a number of chemical reactions happening simultaneously or in rapid sequence. When you add some heat, you provide enough activation energy (the energy that kick-starts a chemical reaction) to make solid chemical compounds packed inside the firework combust (burn) with oxygen in the air and convert themselves into other chemicals, releasing smoke and exhaust gases such as carbon dioxide, carbon monoxide, and nitrogen in the process. For example, this is an example of one of the chemical reactions that might happen when the main gunpowder charge burn.
some of the chemical energylocked inside them is converted into four other kinds of energy (heat, light, sound, and the kinetic energy of movement). According to a basic law of physics called the conservation of energy.
Answer:
The electric flux remains unchanged
Explanation:
From Gauss law the Electric flux is directly proportional to the number of electric field lines passing through a surface. The number of field lines passing through a surface become if the radius is doubled becomes 1/4th that is when radius of the Gaussian surface is doubled, but at the same time, the surface area has increased 4 times , so the electric flux remains unchanged
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