An ellipse has two focal points. One of the focal points is the <u><em>Sun</em></u>.
Because they planets move faster when they are around the sun.
Cathode rays are negatively charged
Explanation:
Thomson's cathode ray beam bent towards the positively charged plate. With this information, he was able to conclude that the rays were negatively charged.
Cathode rays were discovered by J.J. Thomson based on his experiment on the gas discharge tube. He was able to discover some of the properties of the wave.
One notable one was that he observed that the rays deflected towards the positively charged plate.
Since unlike poles attract then he concluded that the cathode rays were negatively charged.
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Answer:
t=0.58s
Explanation:
We can consider only the horizontal component since the horizontal component of the velocity is constant (
), and we want to know how much time it takes for the balloon to travel a horizontal distance 
at that speed. The definition of (horizontal) velocity is 
, so we have:
Answer:
About 34.18kg
Explanation:
Using F=ma, you know that the force that an object exerts can be found by multiplying the mass and the acceleration. Therefore, you can find the mass with the formula 
. Plugging in the values you were given, 
. Hope this helps!
