Question

масса алюмин. чайника 0.4 кг . Определить массу такого же медного чайника.

Answer 1

0.4кг=400гр

V=m1/p1

V=400/2,7=148cm3

m2=p2*v

m2=8,9*148=1317uh=1,3кг

Answer 2

если считать, что в условии про одинаковый чайники имеется в виду объем чайников одинаков, то решение след:

 

дано:

m1=0,4 кг

$p_a=2700 \ \frac {kg}{m^3} = 2,7 \ \frac {g}{cm^3} \\ \\ p_m= 8900 \ \frac {kg}{m^3} = 8,9 \ \frac {g}{cm^3}$

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m2 - ?

 

решение:

V=m1/p_a=0,4 кг / 2700 кг/м3=400 г / 2,7 г/см3=148,5 см3

m2=V*pm=148,5 см3 * 8,9 г/см3=1318,5г=1, 3185кг $\approx$1,3 кг

Answer 3

Calculating the Mass of a Copper Kettle

To determine the mass of a copper kettle equivalent to an aluminum kettle with a mass of 0.4 kg, we can use the density of aluminum and copper to find the mass of the copper kettle.

Density of Aluminum: The density of aluminum is approximately 2.70 g/cm³.

Density of Copper: The density of copper is approximately 8.96 g/cm³.

Calculation

Using the formula:

\[ \text{Density} = \frac{\text{Mass}}{\text{Volume}} \]

We can rearrange the formula to solve for mass:

\[ \text{Mass} = \text{Density} \times \text{Volume} \]

Given that the mass of the aluminum kettle is 0.4 kg, we can convert this to grams (1 kg = 1000 g) and then use the density of aluminum to find the volume of the aluminum kettle.

Step 1: Convert Mass to Grams

0.4 kg = 400 g

Step 2: Calculate Volume of Aluminum Kettle

Using the density of aluminum (2.70 g/cm³):

\[ \text{Volume of Aluminum Kettle} = \frac{\text{Mass of Aluminum Kettle}}{\text{Density of Aluminum}} \]

\[ \text{Volume of Aluminum Kettle} = \frac{400 g}{2.70 g/cm³} \approx 148.15 cm³ \]

Step 3: Calculate Mass of Copper Kettle

Now, using the density of copper (8.96 g/cm³) and the volume of the aluminum kettle, we can find the mass of the copper kettle.

\[ \text{Mass of Copper Kettle} = \text{Density of Copper} \times \text{Volume of Aluminum Kettle} \]

\[ \text{Mass of Copper Kettle} = 8.96 g/cm³ \times 148.15 cm³ \approx 1327.74 g \]

Answer

The mass of a copper kettle equivalent to an aluminum kettle with a mass of 0.4 kg is approximately 1327.74 grams.