two boxes sit on a frictionless surface and are in contact with one another. the first box has a mass of 7 kg and the second box
1 answer:
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Answer:
600 km
6 hours
Explanation:
El tiempo que viaja el automóvil de 6 a 10 de la mañana es
La velocidad del coche es 150 km/hr
La distancia está dada por
A distancia recorrida a las 10 de la mañana es de 600 km.
Ahora el tiempo que se toma está dado por
El tiempo que se tarda en recorrer 900 km es de 6 horas.
Explanation:
According to Newton's law of cooling,
T(t) is the temperature at time t
is temperature of surrounding
At the time of discovery, the temperature of the dead body was,
Temperature of the surrounding,
Temperature after 4 hours,
So,
On solving the above equation,
k = 0.1735
Now, put the value of k in equation (1) at T = 36 degrees C
We know that, the temperature of body before death is T(t) = 37 degrees C
On solving above equation,
t = -0.46 hour
As time can't be negative and we have taken 7:00 pm as reference time.
So, t = 27.67 minutes
So, the death of the person is at 6 : 32 pm. Hence, this is the required solution.