How many joules of energy are required to raise thetemperature
of 100 g of gold from 20.0 degrees celcius to 100degree
celcius?

Q=1040 KJ

Explanation:

Given that

mass ,m = 100 g

We know that 1 kg = 1000 g

100 g = 0.1 kg

m = 0.1 kg

T₁=20°C

T₂=100⁰C

Specific capacity for the gold

Cp=130 KJ/kgK

The energy required to raise temperature from T₁ to T₂

Q= m Cp (T₂ -T₁)

Now by putting the values

Q= m Cp (T₂ -T₁)

Q= 0.1 x 130 (100 -20) KJ

Q=1040 KJ

Therefore the energy required is 1040 KJ.

r=rho l/a where a is the area, l is the length and rho is resistivity so the greater the area the lesser the resistance thats why the earth pin is thicker bcos current follow the shortest path, so less resistive .

answer would be letter choice (a),   a ball resting on a shelf. would be another example of potential energy   >   stored energy > not moving.

a ball spinning on a finger   >   kinetic energy > moving energy

a ball rolling on the ground   >   kinetic energy   > moving energy

a   ball flying through the air   > kinetic energy   >   moving energy

hope that                                         : )