# 3.5 Addition of velocities  (Page 10/12)

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relativity

the study of how different observers moving relative to each other measure the same phenomenon

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what is nuclear reaction?
In a chemical reaction, you have atoms being rearranged in different patterns, so you end up with the same atoms but different molecules. In a nuclear reaction, you go one step deeper: you rearrange protons and neutrons, do you end up with different atoms.
So, for example, stars fuse 2 Hydrogen atoms into 1 Helium atom (that's called nuclear fusion). Nuclear reactors break down heavy unstable atoms into smaller ones (that's nuclear fission)
whats drag force?
who can explain me about the connecting between energy and work? I don't understand about the equation of the formula
Energy can be defined as the ability an object has to do work. so lets say if u want to move something from one place to another you would need energy to do it. a table a certain distance, but if u dont have energy that means you will not be able to move it. Work=Force×distance.
Mario
from work-kinetic energy theorem we get that work=change in kinetic energy
Mario
what is thermo electric thermometer
Who can help me with dynamics?
can someone enumerate the First and second law of thermodynamics
radiation of phones kept amazing me
f=m(v-u)/t
why acceleration due to gravity varies from place to place
I understand light is a range of wavelenghts from em spectrum, but Where do photons come from in particular, how it is emitted from the sun?
please what is the formula for calculating Newton second law of motion?
F=ma
pierre
what is emotion
properties of transverse waves
is visible light electromagnetic wave?
Visible light is a range of wavelengths within the electro magnetic spectrum.
Robert
It is electro magnetic radiation from the sun.
Robert
please what is the formula for coefficient of kinetic friction
What is work

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