Answer:
Chadwick-he discovered the neutron. He discovered this by demonstrating a neutral particle with a mass the same as a proton through a reaction between gramma Ray's and a wax sample.
Rutherford-he discovered the concept of radioactive half-life, the radioactive element radon, and named alpha and beta radiation.
j.j.Thompson discovered that atoms where made up of smaller components. This had major effects for the field of physics.
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When describing the velocity of an object, you must specify the both the speed and the direction.
That’s because <em>velocity is a vector</em>: it has both magnitude (speed) and direction.
If you say that a object is travelling southwest at 70 km/s, you are giving its velocity.
If you say that it is travelling at 70 km/s, you are giving its speed.
Answer:
To eliminate waste. Think of Excrete being another word for remove!
The iron filings<span> can be separated with a magnet. The </span>wood chips<span> can be separated by adding water to the water and picking the floating </span>wood chips<span>from the top. The </span>sand<span> can be separated by pouring the water/</span>sand/salt<span>mixture through a coffee filter or a paper towel</span>
