Answer:This is the part of the scientific method that tests your hypothesis. An experiment is a tool that you design to find out if your ideas about your topic are right or wrong.
Explanation:
The work done by the gravitational force = 0
Given the mass of the box = 40 kg
The box is initially at rest.
Distance moved by the applied force = 5m
Force applied = 130 N
Co-efficient of friction between the box and floor = 0.3
The box is moved only in the horizontal direction by the applied force.
Gravitational force is applied in a direction perpendicular to the applied force. hence it doesn't do any work on the box.
Therefore, the work done by the gravitational force is zero.
Learn more about the gravitational force at brainly.com/question/862529
#SPJ4
In optics, chromatic aberration (CA, also called achromatism, chromatic distortion, and spherochromatism) is an effect resulting from dispersion in which there is a failure of a lens to focus all colors to the same convergence point. It occurs because lenses have different refractive indices for different wavelengths of light.
The correct answer is non-conservative
This is bewildering to people, however, since it shows that it has many aspects of a conservative fields, but is technically not one.
Answer:
A) 0.
Explanation:
beats is the periodic variation in the loudness of a sound which is heard when two notes of almost the same frequency are played simultaneously.
Beats are used in tuning of musical instrument, e.g. a piano. To tune a piano, a piano tuner listens for beats produced between the sound from a standard tuning fork and that from a particular string on the piano when the piano key is struck. The tension in the piano string is adjusted until the beats disappear, i.e. when the frequencies are the same
Two tuning forks of frequency 256Hz and 254Hz are sounded simultaneously. Calculate the frequency of the resultant beat.
f == 2Hz
But in cases where beat is zero, it means the two notes are perfectly the same. This technique is used by a piano tuner to know that a key on the piano is tuned to the frequency of his tuning fork when he strikes them at the same time
NOTE : Hz means per second