Energy required = mass x specific heat x temperature difference
= 0.5 x 4.19x10^3 x 2
= 4190J
Answer:

Explanation:
d = Distance traveled = 40.8 km
s = Speed of jet = 340 m/s
Time is given by




The time taken to complete the journey is
.
This would be a Goal Act Plan, But in translation, Planul Act Gol
The density of the nugget is
and is made of gold
Explanation:
The density of an object can be calculated as

where
d is the density
m is the mass
V is the volume of the object
We have to note that density of an object actually depends on the material the object is made of (therefore, two objects made of the same material can have different mass and different volume, but they have same density).
For the nugget in this problem, we have:
mass: m = 38 g
volume: 
So, its density is

And by looking at the table, we see that this value corresponds approximately to the density of gold, so the nugget is made of gold.
Learn more about density:
brainly.com/question/5055270
brainly.com/question/8441651
#LearnwithBrainly
Before you step on the brakes, the car has kinetic energy, when you step on the brakes, it turns the kinetic energy into heat (thermal energy). When it stops completely, it has potential energy. Hope this helped :)