Physical changes are when things get changed without altering chemical consistencies, which is melting solid butter into liquid one, or boiling water. Chemical changes are things such as caramelizing sugar when making sweets, or when carbon dioxide is created and released when baking bread.
Composer and performer of Old Occitan lyric poetryduring the High Middle Ages (1100–1350). Since the word troubadour is etymologically masculine, a female troubadour is usually called a trobairitz.
Answer: See explanation
Explanation:
The negative effects of video games include:
1. Social disconnection- One negative effect of video games is that it brings about social disconnection. Video games are typically addictive and this leads to the individual playing the game gradually disconnecting from the social life. Such people tends to play games rather than having conversations with their friends or family members.
2. Addiction - Video games are addictive which can lead to depression or bring about mental health disorder.
3. Wrong values - Some video games instill wrong values in children. Such values include violence, aggression and vengeance.
4. Negative academic achievement - Students who play video games a lot tend to have a negative academic achievement as the time they could have used in reading or studying is used for playing games and thus tends to have an effect on the performance in school.
5. Health hazards- Video games may lead to health hazards- such as nerve compression, obesity, and video-induced seizures.
The positive effect of video games are:
1. Problem solving - Video games train ones brain to be creative and also come up with solution to challenges.
2. Quick thinking - Video games help one to think quickly in order to solve challenges and overcome obstacles.
3. Create positive emotions - Easy games can bring about positive emotions and uplift ones mood, and help in promoting relaxation.
4. Stimulate learning - Playing video games can help an individual to learn new skills.
Ca +2
At -1
In +3
Sr +2
Ra +2
Fr +1
Ba +2
As -3
Answer:
<u>Bond energy of</u> (A) C≡C > (B) C=C
<u>and, </u>(C) C=N > (D) C-N
Explanation:
Bond energy refers to the amount of energy required to break a bond or the energy released when a bond is formed. Bond energy of a covalent bond suggests the bond strength of the chemical bond and depends on the <u>bond length and bond order of the chemical bond. </u>
<u>The bond energy of a chemical bond increases with the bond order and decreases with the bond length</u>. As, length of a bond decreases with increase in the bond order.
First pair: (A) C≡C (B) C=C
The bond order of C≡C - 3, the bond order of C=C - 2
Since the bond order: C≡C > C=C
Bond length: C≡C < C=C
<u>Therefore, bond energy of (A) C≡C > (B) C=C</u>
Second pair: (C) C=N (D) C-N
The bond order of C=N - 2, the bond order of C-N - 1
Since the bond order: C=N > C-N
Bond length: C=N < C-N
<u>Therefore, bond energy of (C) C=N > (D) C-N</u>
