I think its Lithium maybe
Answer:
Graphs are pictorial representations of relationships.
Answer: I have not learned this yet in class.
I am in 8th grade, I have not learned this stuff yet.
Answer:
A) 0.
Explanation:
beats is the periodic variation in the loudness of a sound which is heard when two notes of almost the same frequency are played simultaneously.
Beats are used in tuning of musical instrument, e.g. a piano. To tune a piano, a piano tuner listens for beats produced between the sound from a standard tuning fork and that from a particular string on the piano when the piano key is struck. The tension in the piano string is adjusted until the beats disappear, i.e. when the frequencies are the same
Two tuning forks of frequency 256Hz and 254Hz are sounded simultaneously. Calculate the frequency of the resultant beat.
f == 2Hz
But in cases where beat is zero, it means the two notes are perfectly the same. This technique is used by a piano tuner to know that a key on the piano is tuned to the frequency of his tuning fork when he strikes them at the same time
NOTE : Hz means per second
Fluid mechanics deals with pressure and internal forces in the fluid. So the correct answer should be a) how fluids do work.
If you put two solids in contact, there will be a contact force created between them. Since Pressure = Force / Area, the correct answer should be b) exert pressure on each other.