Answer:
Yes
Explanation:
According to law of conservation of mass, it can neither be created or destroyed. It remains constant. It can change to energy. This can be explained using Einstein's mass energy relation. E= mc^2.
So, the changes such as burning cannot be reversed do obey law of conservation of mass. Suppose wood is burnt. The mass of wood converts into energy and ashes.
yes!!! Everything follows the law of
conservation of mass, no matter what
2. Practice presenting in front of friend or family
3. Practice presenting in front of a mirror
4. time the length of your presentation
Answer;
3. Practice presenting in front of a mirror
Explanation;
Like scientific papers, oral presentations at a conference or internal seminar are for sharing your research work with other scientists. They, too, must convince the audience that the research presented is important, valid, and relevant to them.
Planning a presentation involves a comprehensive assessment of the speaking situation. It is important to know the purpose of the presentation, know the audience and also where the presentation will take place, among other important aspects.
Answer:
The correct answer is option 2. Practice presenting in front of friend or family
Explanation:
Generally while making an oral presentation three things are very vital-
a) Cover all the vital points of the research work presented through oral presentation thus writing all the points on a piece of paper is must.
b) One must use appropriate body gesture while giving the presentation , thus practicing in front of mirror is also a required exercise
c) The presenter must be able to deliver his/her presentation in the stipulated time period thus timing the presentation is also important.
Since mirror practice is sufficient to work on body language, eye contact with the audience and gesture, thus there is no need to practice in-front of friend or family.