Answer:
The K.E of the pendulum is, K.E = 200 J
Explanation:
Given data,
The kinetic energy of the bob of the pendulum at the bottom, K.E = 600 J
The potential energy at the height 4 m, P.E = 400 J
According to the conservation of energy, the total energy of the mechanical system should be conserved.
At the bottom of the swing, the entire mechanical energy of the pendulum is purely kinetic. Therefore the total energy
E = P.E + K.E
= 0 + 600 J
= 600 J
Therefore, the total energy of the system, E = 600 J
At height 4 m, the total energy of the system remains the same.
Therefore,
600 J = 400 J + K.E
K. E = 600 J - 400 J
= 200 J
Hence, the K.E of the pendulum is, K.E = 200 J
Answer;
A barrier, a surface or a boundary
Explanation;
Reflection is the property waves that occurs due to the bouncing back of a wave after it strikes a barrier.
Reflection involves change in direction of a wavefront at an interface between two different media such that the wavefront returns into the medium from which it originated. In other words, the direction of the wave changes when they bounce of a barrier or a surface.
Answer:
-5 m/s
Explanation:
vo = 10 m/s
a = -1 m/s²
t = 15 s
v = vo + at
= 10 + (-1)(15)
= -5 m/s
(actually the train has come to a stop at t = 10s)
plate tectonics
Earth's tilt and orbit
sunspots
I had a different quiz, different question, same answer:
Which of these contributes to the creation of Milankovitch cycles?
B:Changes in Earth's axial tilt
b. medium.
c. vibration.
d. compression.
The term 'wave' is used to refer to a disturbance that transfers energy from one place to another. Waves move energy, not matter, over distances.
The correct option is A.
In groundwater, a "wave" refers to the movement of water through porous subsurface materials, such as soil or rock. These waves can be influenced by various factors, including hydraulic gradients, geological properties, and recharge rates. Groundwater waves can propagate both vertically and horizontally, affecting the flow and distribution of groundwater in underground aquifers. Understanding these waves is crucial for managing and sustaining groundwater resources, as they impact water availability, quality, and the overall behavior of aquifer systems, influencing vital aspects of groundwater management and environmental conservation.
A disturbance that transfers energy from place to place is called a wave. Waves move energy, not matter, across distances. An easy example to visualize this concept is if you throw a pebble into a pond. The energy created by the pebble's impact causes ripples, or waves, to move out from the point of impact. In this case, the water itself doesn't travel across the pond - only the energy does. The other terms - medium, vibration, and compression, all play roles in the transmission of waves, but they are not the name for the energy transfer itself. A medium is what a wave moves through (like air or water), a vibration is a type of movement that can create waves, and a compression is a part of a certain kind of wave. However, the correct term for the energy transfer you're describing is 'wave'.
Hence The correct option is A.
Learn more about Wave here:
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Answer: Option (a) is the correct answer:
Explanation:
A wave is defined as the transfer of energy from one place to another and no exchange of matter.
Whereas medium is a substance through which wave or energy can be transported from one point to another.
On the other hand, vibration is the back and froth motion of particles of a substance or matter.
And compression means to bring the particles of a substance together by increasing the pressure.
Thus, we can conclude that a disturbance that transfers energy from place to place is called a wave.