The correct choice is
The piano key is out of tune and has a frequency of either 325 or 333 Hz
Beat frequency has been given as 4 Hz. hence the frequency must be above or below the given frequency of 329 Hz by 4 Hz. To get the upper level of frequency we add the beat frequency to the given frequency. To get the lower level, we subtract the beat frequency from the given frequency
f' = 329 + 4 = 333 Hz
and
f'' = 329 - 4 = 325 Hz
Answer
The force on the left across the lab table.
Explanation
The Newton's third law of motion states that; action and reaction are equal but a ct in opposite direction.
When the block of is pulled on the right with a force of X Newtons then there is a force -X Newtons applying and equal force on the left. For every action there must be a reaction with is equal and applying in the opposite direction.
So, if the block is pulled on the right by a force of 8 N there is another equal force applying on the left.
B. electrons.
C. neutrons.
D. protons.
According to the octet rule, an atom with two electron shells is most stable when it contains eight electrons. The answer is letter B. All atoms wanted to attain a stable energy level equal to that of the noble gases. A noble gas is where all valence electrons in the valence shell is completely filled.
Answer:
Measures a slower course of time
Explanation:
According to the theory of relativity, there is a difference in the time measured by two observers, due to a relative speed difference between them. In other words, you observe that a clock that moves with respect to you will measure a slower course of time than a clock that is at rest in your frame of reference.