Answer:
C. The compass detects the magnetic field produced by the electric current.
Explanation:
In 1820, Hans Christian Ørsted discovered that a magnetized needle placed in a direction parallel to an electric conductor was deflected when an electric current circulated through the conductor, evidencing the existence of a magnetic field around any conductor crossed by an electric current.
Answer:

Given:
Initial velocity (u) = 20 m/s
Final velocity (v) = 10 m/s
Time taken (t) = 5 seconds
To Find:
Acceleration (a) of the car
Explanation:
From equation of motion we have:

By substituting value of v, u & t in the equation we get:


Acceleration (a) of the car = -2 m/s²
Physical properties are associated with physical changes.
For example: The physical properties of substances are as follows;
1. Melting
2. Freezing
3. Vaporization
Answer:
probably a
Explanation:
I think that's what it is