What did early experiments and Coulomb’s Law describe? Select all that apply. The further away two charged objects are the stron
1 answer:
Answer:
The closer two charged objects are the stronger the electrical force between them.
Like charges repel and opposite charges attract.
The further away two charged objects are the weaker the electrical force between them.
Explanation:
Coulomb's law tells us about the electric force/electrostatic force/Coulomb force between two charged particles. The force (F) between the particles Q and q, separated by a distance r is given as,
where k = Coulomb constant.
It is evident from the equation that closer the charged particle force will be more. As the distance between the charge increases the force will be weaker. Also the like charges will repel and opposite charges will attract.
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Answer:
0.775
Explanation:
The weight of an object on a planet is equal to the gravitational force exerted by the planet on the object:
where
G is the gravitational constant
M is the mass of the planet
m is the mass of the object
R is the radius of the planet
For planet A, the weight of the object is
For planet B,
We also know that the weight of the object on the two planets is the same, so
So we can write
We also know that the mass of planet A is only sixty percent that of planet B, so
Substituting,
Now we can elimanate G, MB and m from the equation, and we get
So the ratio between the radii of the two planets is
Answer:
v' = 14.76 m/s
Explanation:
given,
frequency of the one truck = 206 Hz
apparent frequency ,f' = 189 Hz
speed of sound, v = 343 m/s
speed of observer (v_o)and source (v_s) = v'
now, using Doppler's effect
314.69 + 0.9174 v' = 343 - v'
1.9174 v' = 28.30
v' = 14.76 m/s
hence, the speed of the truck is equal to 14.76 m/s