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Elina [12.6K]
3 years ago
8

2a Define Radioactivity?​

Chemistry
2 answers:
Luda [366]3 years ago
8 0

Answer:

The emmision of ionizing radiation or particles caused by the spontaneous disintegration of atomic nuclei

or

the giving off of rays of energy or particles by the breaking apart of atoms of certain elements

Gwar [14]3 years ago
7 0
Jekskowkqoanwknwkwnwownsksnsk
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Solid added to liquid and the solid floats down to bottom of container physical or chemical change?
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Answer:

Physical change

Explanation:

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When you transferred the hot metal from the boiling water and into the calorimeter (coffee cup), if the thermometer touched the
sergey [27]

When you transferred the hot metal from the boiling water and into the calorimeter,  The effect will be

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This is further explained below.

<h3>What is the Specific heat of the metal?</h3>

a )Since the metal of the cup is hot and the water inside is cold, the water's temperature will rise as heat is transferred from the metal to the liquid.

Change in temp is positive

b)

Due to (a), heat is lost from the food to the water in the cup, lowering the metal's temperature.

Temp of metal V, dT=-ve

c)

No change occurs in the specific heat of metal because of its constant property.

Read more about Temperature

brainly.com/question/13439286

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7 0
2 years ago
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How much energy (in Joules) is needed to increase the temperature of 25 grams of glass by 5.0C. Aluminum Iron Glass Copper Water
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25 grams of glass by 5.oc aluminium iron glass copper water

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3 years ago
Yo what is the moon phases​
Fynjy0 [20]

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Where did the molecules of carbon dioxide come from while the tortilla chip was burning
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The answer can be explained when you burn something cleanly (with a very hot item) or not. With a candle lots of Carbon dioxide is producted but when using a bunson burner hardly any CO2 is produced. 
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