The density of iron is 7.8 g/cm3 and that of aluminum is 2.7 g/cm3. using a balance, you find that a block of iron has the same mass as a block of aluminum. which block has the larger volume? question 15 options: you cannot tell from the information given. the volumes are the same. the iron block the aluminum block 2.) as water in an ice cube tray freezes, question 23 options: it absorbs energy from its surroundings. its surroundings absorb energy from it. it absorbs coldness from and releases energy to its surroundings. it only absorbs the coldness from its surroundings. it neither absorbs nor releases energy, because its temperature stays constant.

1.The Aluminum block

2.its surroundings absorb energy from it.

Explanation:

In this question it is important to remember that density of an object is the mass of that object divided by its volume.

The expression applied here is density=mass/volume

Given that the mass is constant,lets say mass= m=1g

and density of aluminum=2.7g/cm³ and that of iron is 7.8 g/cm³ then volume=?

Volume=mass/density

Volume of aluminum= 1/2.7 =0.3704 cm³

Volume of iron = 1/7.8 =0.1282 cm³

Here we see volume of Aluminum block is the largest.

2.As water in an ice cube tray freezes, its surroundings absorb energy from it.When the water freezes, latent heat of freezing is given out to the surrounding.When water is freezing, it stays at a constant temperature of 0°C, the heat energy released ensures that there is no cooling past 0 °C.

a

air

in a tire you fill a tire with air

then a couple days later you check the air pressure in the tire

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