Answer:
The density is 1.3 kg per cubic meter
Explanation:
Density is mass divided by volume, so:
8.5-2 = mass of paint (kg)
5 = volume (L)
P = 6.5/5
Answer:
+ 900 J
Explanation:
Since the total energy change ΔE = internal energy change ΔU since there is no change in kinetic and potential energy,
ΔE = ΔU
ΔE = Q - W where Q = heat absorbed by system and W = work done by system
Now since the system absorbs 500 J of heat, Q = + 500 J and work of 400 J is done on the system, W = -400 J
So, the values of the variables into the equation, we have
ΔE = Q - W
ΔE = + 500 J - (-400 J)
ΔE = + 500 J + 400 J
ΔE = + 900 J
So, the internal energy change, ΔE = + 900 J
Answer:
2.81 ev is the correct answer
Explanation:
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We use only one variable at a time to find the accurate result. We want to see how the result of experiment changes everytime with a single variable.
Answer:
the answer is option B because opposit sides of the magnets attract each other