When resistance force on a lever increases, nothing happens automatically.
But if you want to keep lifting the load, then YOU must increase the force of
your effort in order to make it happen.
Answer:
D. all atoms with an atomic number over 83
Answer:
PART A)
L = 97.4 dB
PART B)

PART C)
L = 67.9 dB
Explanation:
PART A)
level of sound is given as

now we have


PART B)
Since source is a spherical source
so here the intensity of sound is inversely depends on the square of the distance from the source



PART C)
level of sound is given as

now we have


<span>As the marble leaves the table at two different speeds, its
horizontal velocity changes, but its vertical velocity does not.</span>