The answer is B. metalloids
(boron, silicon, germanium, arsenic, antimony, tellurium, astatine, and polonium)
Answer:
Explanation:
We need 2 different equations for this problem: first the velocity of sound equation, then the frequency of the sound equation.
The velocity of sound is found in:
v = 331.5 + .606T
We need to find that first in order to fill it into the frequency equation which is
where v is the velocity we will find the part a, f is frequency and lambda is the wavelength. Starting with the velocity of the sound:
v = 331.5 + .606(25) and
v = 331.5 + 15 and rounding correctly using the rules for sig fig when adding:
v = 347 m/s
Filling that into the frequency equation:
and
so
Explanation:
u=0, g=9.8m/s², h=1.2m, v= ?.
from the formula => v²-u²=2gh
=> v²=2×9.8×1.2
=> v = √23.52
=> v = 4.84 m/s .
therefore, with 4.84 m/s the ball will hit the ground.
hope this helps you.
D) sepals
other options are ridiculous