Answer:
the answer is= NUCLEAR FISSION, NUCLEAR FUSSION, RADIOACTIVE DECAY.
Answer:
Explanation:
Volume of metal = volume of water displaced = (30.0 - 25.0) ml = 5.0 ml
Density of metal = 5.50 g/ml
Mass of metal =
Volume of water = 25.0 ml
Density of metal = 1.0 g/ml
Mass of metal =
As we know that,
.................(1)
where,
q = heat absorbed or released
= mass of metal = 27.5 g
= mass of water = 25.0 g
= final temperature = ?
= temperature of metal =
= temperature of water =
= specific heat of lead = ?
= specific heat of water=
Now put all the given values in equation (1), we get
Thus the specific heat of the unknown metal sample is
Answer:
The answer is B
Explanation:
3+ means there is 3 more protons than electrons.
So electron need 3 more (-ve) charge in order to have the same charge as proton to become neutral atom (no charge).
e + 3 = 8
e = 8 - 3
= 5
Answer: The correct option is A.
Explanation: Chemical reaction is defined as the reaction when there is a formation of new substance. Indicators that help in determining the chemical reaction are:
- Change in Temperature
- Appearance or disappearance of color
- Formation of bubbles
- Formation of a precipitate
- Characteristic odor
Option A: As seen from the image, there is a color change happening in the event. So, it can be considered as a chemical reaction.
Option B: In Event 1, release of heat and light is not visible. Hence, this is not the indicator for detection of chemical reaction.
Option C: In Event 2, we cannot judge the dropping of temperature just by seeing the image. Hence, this cannot be considered as a chemical reaction.
Option D: In this, the color is not mixed throughout the liquid, which means they are not reacting and hence, is not the indicator for chemical reaction.
Therefore, option A is the correct answer.
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