C is the answer because contact force, is the only force mentioned that opposes the motion of the rock
<span>C) Most earthquakes and volcanoes occur along distinct lines around the world.
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u = 5.83
Explanation:
The magnitude of a vector is
Reactions between atoms occur whenan atom seeks to fill its outer shell of electrons
<h3>
Answer:</h3>
15 ohms
<h3>
Explanation:</h3>
- The effective resistance of resistors is calculated depending on whether the resistors are arranged in series or parallel.
- The effective resistances of resistors in parallel is calculated using the formula;
In this case we are given,
Effective resistance, Rt as 5.0 Ω
First resistor has 10 Ω
second resistor has 30 Ω
We are required to calculate the resistance of the third resistor;
But, effective resistance for parallel arrangement is given by;
Then;
Thus;
Therefore;
Thus, the resistance of the third resistor is 15 ohms