True it was a perfect running technique
A and C, The Color and Texture of the material.
Physical science is the study of matter and energy, and the relationship between matter and energy.
E. The study of matter and energy, and the relationship between matter and energy
<u>Explanation:</u>
The study of issue and vitality and the associations between physicists concentrate such subjects as gravity, light, and time. Albert Einstein, a well known physicist, built up the Theory of Relativity.
Material science is the investigation of issue and vitality at all scales—from the littlest particles of the issue to the whole universe.
A geologist has practical experience throughout the entire existence of Earth. A sea-life scholar contemplates sea plants and creatures. A physicist ponders matter, vitality, and how they are connected.
There are three primary parts of science: physical science, Earth science, and life science. Physical science is the investigation of lifeless common items and the laws that administer them. It incorporates material science, science, and cosmology.
Answer: 9.09 seconds
Explanation:
Given that,
speed of sound = 330 m/s
Distance away = 3 km
(since the SI unit of distance is metres, convert 3km to metres
1km = 1000 metres
3km = (3 x 10000) = 3000 metres
Time it take for the sound to reach you = ?
Now, recall that speed is obtained by dividing distance travelled by the time taken.
i.e speed = distance / time
330 m/s = 3000 m / time
Time = 3000 m / 330 m/s
Time = 9.09 seconds
Thus, it will take 9.09 seconds for the sound to reach you.
Your book has applied the chain rule to produce:
dv/dt = dv/dx * dx/dt
Now, we can get dv/dx by:
1) Differentiate
x = vt, with respect to v.
dx/dv = t
Now, if we take the inverse of this, we can obtain dv/dx
dv/dx = 1/t
This is also proven by the fact that dv/dx is the change in velocity and if you multiply it by dv/dx, which is equivalent to dividing by the change in time, as we just proved, then you obtain acceleration.
