Question

Сверло массой 10 г с начальная температура 15 °C процессе работы получила 40 кДж найти конечную температуру

Answer 1

Дано:

m=10г=0,01кг

t1=15С

с=500Дж/кгС

Найти:

t2=?

Решение:

Q=cm(t2-t1)  

t2-t1=Q/(сm)

t2=Q/(сm)+t1

t2=40/(500*0,01)+15=23C

Answer 2

To find the final temperature of the drill, we can use the specific heat formula:

Q = m * c * ΔT

where: Q = energy transferred in joules (40 kJ in this case, which is 40,000 J) m = mass of the drill in kilograms (10 g = 0.01 kg) c = specific heat capacity of the material (assumed to be constant, typically around 0.46 J/g°C for metal) ΔT = change in temperature (final temperature - initial temperature)

Let's calculate the final temperature:

First, convert the mass to kilograms: m = 10 g = 0.01 kg

Assuming a specific heat capacity of 0.46 J/g°C: c = 0.46 J/g°C

The initial temperature (in °C) is given as 15°C.

Now, let's rearrange the formula to find the change in temperature (ΔT): ΔT = Q / (m * c)

ΔT = 40,000 J / (0.01 kg * 0.46 J/g°C) ΔT = 40,000 J / 0.0046 J/°C ΔT ≈ 8695.65 °C

Now, to find the final temperature (Tf), we add the change in temperature (ΔT) to the initial temperature (Ti):

Tf = Ti + ΔT Tf = 15°C + 8695.65 °C Tf ≈ 8710.65 °C

Therefore, the final temperature of the drill after the work process is approximately 8710.65°C. However, it's important to note that this result seems unusually high, and it's possible that there might be an error in the given information or assumptions made. Please double-check the data and calculation process to ensure accuracy.