Answer:
The correct answer is a rarefaction.
Explanation:
Sound waves are longitudinal waves that propagate in a medium, such as air. As the vibration continues, a series of successive condensations and rarefactions form and propagate from it. The pattern created in the air is something like a sinusoidal curve to represent a sound wave.
There are peaks in the sine wave at the points where the sound wave has condensations and valleys where it has rarefactions.
Have a nice day!
The ideal mechanical advantage (IMA) of an inclined plane is given by:
where L is the length of the inclined plane while h is the height.
In our problem, L=120 m and h=40 m. Therefore, the IMA of the ski lift is
Answer:
Explanation:
18 km/hr(1000 m/km) / (3600 s/hr) = 5 m/s
36 km/hr = 10 m/s
v² = u² + 2as
a = (v² - u²)/2s
a = (10² - 5²)/2(1000) = 0.0375 m/s²
v² = 10² + 2(0.0375)(1000)
v² = 175
v = 13.22875... ≈ 13 m/s ≈ 48 km/hr
v = u + at
t = (v - u) / a
t = (10 - 5)/0.0375 = 133.333... 133 s
t = (13.22875 - 10) / 0.0375 = 86.1 s
Answer:
the velocity is zero, the acceleration is directed downward, and the force of gravity acting on the ball is directed downward
Explanation:
Is this exercise in kinematics
v = v₀ - g t
where g is the acceleration of the ball, which is created by the attraction of the ball to the Earth.
At the highest point
velocity must be zero.
The acceleration depends on the Earth therefore it is constant at this point and with a downward direction.
The force of the earth on the ball is towards the center of the Earth, that is, down
all other alternatives are wrong
Answer:
They have no freedom to move
Explanation:
Particles can be solids, liquids and gases.
Solids are the substances in which the atoms are very close to each other. It is very difficult to separate the molecules. The atoms cannot move from one place to another. The inter molecular forces between them is very strong.
Hence, the correct option that describes the movement of atoms in a solid is (c) "They have no freedom to move".
