They're all complete circuits, but 'A' won't DO anything, because it has nothing to make electrons want to flow around it (like a power supply, a solar cell, a battery etc).
Net force = mass x acceleration = 250 x 3 = 750 N
Answer:
when u think about that the answer is gone be d thats my answer D
Explanation:
the mass is 7 kilograms.
mass is constant and does not change in different environments (such as different gravitational fields) as it is "stuff". What changes is weight, or the force felt by gravity on the mass due to the equation: F=MA, were F is the weight of the object being recorded, M is the mass (constant in this case), and A is the acceleration (in this case gravity). A bowling ball would have the same mass on earth as on the moon, but its weight would be different due to the different acceleration due to gravity.
Answer:
the change in entropy is ΔS= 1.278*10^4 J/K
Explanation:
according to the second law of thermodynamics, and assuming a reversible process
ΔS= ∫dQ/T
where
ΔS= change in entropy
Q= heat exchanged
T = absolute temperature
for sensible heat
Q= m*c*(T-To)
c= specific heat , T= final temperature , To= initial temperature
therefore
dQ= m*c*dT
ΔS= ∫dQ/T = m*c*∫dT/T = m*c*ln (T2/T1) = Q* ln (T2/T1)/(T2-T1)
replacing values
ΔS= Q* ln (T2/T1)/(T2-T1) = 4.00 ×10^6 J* ln(318 K/308 K)/(318 K-308 K) =12780.64 J/K
ΔS= 1.278*10^4 J/K