Answer:
b. K = U
Explanation:
In this case you have that there are no non-conservative forces over the pendulum. Hence, the total mechanical energy if the pendulum must conserve. You take into account that the potential and kinetic energy of a pendulum are given by:
m: mass of the pendulum
h: height of the pendulum
v: speed
In each moment of the trajectory of the pendulum ET does not change.
You have that, at the lowest point U=0J and for the highest point K=0J. For that point K=ET and U=ET respectively.
Hence, for a mid-way between those points it is necessary that:
b. K = U
This sounds like thermal expansion.
CFCs, carbon dioxide, green house gases and it's effects are responsible for the hole in ozone layer.
Answer:
Sound wave can be described by five characteristics: Wavelength, Amplitude, Time-Period, Frequency and Velocity or Speed.
Answer:
It simply means that, the pencil is long enough to attain a length of six (6) centimeters when measured with a measuring tool such as a ruler, tape, etc.
Explanation:
A scientific method can be defined as a research method that typically involves the use of experimental and mathematical techniques which comprises of a series of steps such as systematic observation, measurement, and analysis to formulate, test and modify a hypothesis.
Measurements refers to a process which typically involves identifying and determining the dimensions of a physical object. The dimensions include important parameters such as width, height, length, area, volume, circumference etc.
Hence, a pencil whose length is measured as 6 centimeters has a physical dimension that covers a distance of six (6) centimeters in terms of size.
In conclusion, the pencil would cover a length of six (6) centimeters when measured vertically and a corresponding height of six (6) centimeters when measured horizontally.
