I think it’s 15cm
Might be 7cm
Answer:
The answer is D.
Explanation:
They vibrate parallel to the wave.
During the propagation of a sound wave in air, the vibrations of the particles are most accurately represented as longitudinal. Longitudinal waves are waves in which the motion of the individual particles of the medium occurs in a direction that is parallel to the direction of energy transmission.
ANSWER: B
EXPLANATION: There are four natural states of matter: Solids, liquids, gases and plasma. The fifth state is the man-made Bose-Einstein condensates. In a solid, particles are packed tightly together so they don't move much.
They cannot be divided and still keep the properties of the element true about all of these atoms. Option D is corect.
<h3>What is an atom?</h3>
The atom consists of matter that may be split without releasing electrical charges.
It's also the smallest unit of matter with chemical element features. As a result, the atom is the fundamental unit of science.
In the nucleus proton and the neutron is exists. The condition of the atom to be electrically neutral is that the number of the proton and electron should be the same.
They cannot be separated while still maintaining the element's characteristics for each and every one of these atoms.
Hence, option D is corect.
To learn more about the atom refer to the link;
brainly.com/question/1566330
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<span>time of flight T = 4 sec
time to reach max height = 2 s
=====================
if (u = 34 m/s) was initial speed and (p) angle of projection
u cos (p) *T = Horizontal Range
R = 4 u cos (p) ---------- (1)
--------------------------------
y = u sin (p) * t - 0.5 gt^2 ------- (2)
vy = speed vertical compo =dy/dt= u sin (p) - gt
vy =0 at max height
t (max) = 2 =given = u sin (p) /g
u sin (p) = 2g ------------------------------------ (3)
sin (p) = 2*9.8/34 = 0.5765
so > cos (p) = 0.8171
Range = R = 4 u cos (p) = 4*34*0.8171
R = 111.13 meter
==================
max height
y (max) = u sin (p) * 2 - 0.5 g*2^2
y (max) = 2g * 2 - 0.5 g*4
y (max) = 4g - 2g = 2g = 2*9.8 = 19.6 meter</span>