I think, it must be a chemical. Because the fire is a chemical reaction. So, the chemical energy converted to heat energy.
Never are fully correct but b would be most right
Answer:
750 kN
Explanation:
Pressure = force / area
P = F / A
1,150,000 Pa = F / 0.65 m²
F = 747,500 N
Rounded to two significant figures, the force is 750,000 N, or 750 kN.
Answer:
The answer is letter C, The energy of the supersaturated liquid is converted to heat as the compound crystallizes.
Explanation:
"Hand warmers" are very essential when the cold season comes. It provides warmth to the hands, especially when going outdoors. There are different kinds of hand warmers, such as the<em> "reusable hand warmer." </em>In contrast to air-activated hand warmers, the reusable hand warmers contain sodium acetate (not iron).
Sodium acetate is a "supersaturated liquid." This means that is has more substances dissolved in it. So, when this crystallizes, heat is released. Remember that crystallization is considered an "exothermic process." This means that the process releases energy (in this case, through "heat").
Thus, this explains the answer, letter C.
F=ma
=> 20=10m so m=2
Then the force is doubled 20.2=40
F'=ma'
m does not change so 40=2.a'
a'=20 which is option b.
Give a brainliest please:-)