Answer:
the mass of water is 0.3 Kg
Explanation:
since the container is well-insulated, the heat released by the copper is absorbed by the water , therefore:
Q water + Q copper = Q surroundings =0 (insulated)
Q water = - Q copper
since Q = m * c * ( T eq - Ti ) , where m = mass, c = specific heat, T eq = equilibrium temperature and Ti = initial temperature
and denoting w as water and co as copper :
m w * c w * (T eq - Tiw) = - m co * c co * (T eq - Ti co) = m co * c co * (T co - Ti eq)
m w = m co * c co * (T co - Ti eq) / [ c w * (T eq - Tiw) ]
We take the specific heat of water as c= 1 cal/g °C = 4.186 J/g °C . Also the specific heat of copper can be found in tables → at 25°C c co = 0.385 J/g°C
if we assume that both specific heats do not change during the process (or the change is insignificant)
m w = m co * c co * (T eq - Ti co) / [ c w * (T eq - Tiw) ]
m w= 1.80 kg * 0.385 J/g°C ( 150°C - 70°C) /( 4.186 J/g°C ( 70°C- 27°C))
m w= 0.3 kg
No, gravity pulls every object with the same force irrespective of its shape, size place etc.
Therefore the force of gravity on the iron and wooden piece of same mass is same. Also the force of gravity is same on the crumpled piece of paper as that of plain paper.
Force of gravity is always same.
Answer:
I think the answer is the last one, but I don´t really know much about science. But I REALLY need to be marked brainlist, PPPPPPPLLLLLLEEEEAAAASSSSEEE!!!!!!
Explanation:
Hey There!
The law of conservation of momentum is "For a collision between object 1 and object 2 in an isolated system, the total momentum of the two objects before the collision is equal to the total momentum of the two objects after the collision"
Have A Brainly Day!
Answer by, Kkmmll44 :P
Converting the measured force into a resultant displacement requires an accurate spring constant. This spring constant may change as the temperature rises due to microstructural effects. As the temperature increases, the spring constant decreases. A linear fit was made to the data to determine the spring constant
Equations!
F = kx. F is the force applied to the spring in newtons (N) k is the spring constant measured in newtons per meter (N/m) x is the distance the spring is stretched from its equilibrium position in meters (m) The Hooke's Law Apparatus.
Effects!
The heat treatment process alters the microstructure and strength of material, which will directly influence fatigue life [2]. Spring manufacturing requires materials
Brainliest please :)
Hope this helps!
