Answer:
True
Explanation:
There are 9 carbon atoms, 8 hydrogen atoms and 4 oxygen atoms, therefore the subscript 9 belongs.
B.
look at you shoelaces they are not hard, don't move like a liquid, or have a high density.<span />
Answer: (A) a back-and-forth motion on the surface of the earth
Explanation:
Earthquake generates seismic waves which are longitudinal waves.Longitudinal waves travel parallel in the direction of transfer of energy. Meaning that they travel in back and forth motion.
Longitudinal waves consist of compressions and rarefactions. When compressions occur when particles are close together and are regions of high pressure. Whereas, rarefactions occur when particles are further apart and regions of low pressure.
Answer:
Force exerted = 25.41 kN
Explanation:
We have equation of motion
v² = u²+2as
u = 345 m/s, s = 8.9 cm = 0.089 m, v = 0 m/s
0² = 345²+2 x a x 0.089
a = -668679.78 m/s²
Force exerted = Mass x Acceleration
Mass of bullet = 38 g = 0.038 kg
Acceleration = 668679.78 m/s²
Force exerted = 25409.83 N = 25.41 kN