<span>Physicists use certain units to measure heat energy and electrical energy:
- Joule (Watt sec )
- Watt - hour
- Kilowatt- hour
- Calorie
Hope this helps!
</span>
Answer:
the amount of energy needed to raise the temperature of the iron is 90 J.
Explanation:
Given;
mass of the iron, m = 2 g
initial temperature, t₁ = 20⁰ C
final temperature, t₂ = 120⁰ C
specific heat capacity of iron, c = 0.45 J/g⁰C
The amount of energy needed to raise the temperature of the iron is calculated as follows;
H = mcΔt
H = mc(t₂ - t₁)
H = 2 x 0.45 x (120 - 20)
H = 90 J
Therefore, the amount of energy needed to raise the temperature of the iron is 90 J.
Answer:
10
Explanation:
F=m.a
(Force= mass.acceleration)
F = 2.5 = 10 N
Its just Calcium Flouride because as you can see it is an Ionic bond (Ca is metal and fl is a gas usually)
In order to catch up with the cockroach, the time it took for it to reach just before under the counter must be the same time for me to travel its covered distance. Thus,
time of cockroach = time of my motion
Time of cockroach = Distance/Constant Speed = 1.30 m/1.50 m/s = 0.867 seconds
We use this for the equation below:
x = v₀t + 0.5at²
0.75 m = (0.7 m/s)(0.867 s) + 0.5(a)(0.867 s)²
Solving for a,
a = 0.381 m/s²