Answer:
The charge of each sphere is 
Explanation:
The free body diagram of this question is shown on the first uploaded image
From the question we are told that
The mass of the two sphere is 
The length of the connection is 
The angle between the suspended side is 
At Equilibrium the force acting at the horizontal is = 0N and the net force acting at the vertical is zero
This can be represented mathematically as
For 
=> 
For 
=> 
Now 
Where F is the electrical force which is mathematically represented as
Therefore
Where 
is the distance between the two masses and from the diagram it is
So
making q the subject of the formula
Where k is the Coulomb's constant with a value of 
Substituting values
The negative sign is because we are told from the question that they are negatively charged
Answer:
Magnetic field lines form closed loops around current carrying straight wires.
Explanation:
Magnetic field lines is known to form closed loop (which also serves as a bar magnet) around current carrying conductor in a magnetic field. This direction of the loop around the conductor either clockwise or anticlockwise will determine the direction of current in the conductor.
This directions can be determined using the Maxwell cockscrew or clenched fist rule.
According to clenched fist rule which states if the conductor is grasp with the right hand, the curled finger will point in the direction of the magnetic field and the thumb will point in the direction of the current.
Note that the magnetic field lines around the conductor also behaves like a bar magnet.
Answer:
The sun's gravity pulls the planet toward the sun, which changes the straight line of direction into a curve. This keeps the planet moving in an orbit around the sun. Because of the sun's gravitational pull, all the planets in our solar system orbit around it.
Answer:
Proper weighting
Explanation:
Proper weighing involves the condition of a scuba diver that is fully geared having a near empty tank and the BCD emptied with a held breadth is expected to float at eye level
The fundamental of adequate or good buoyancy of a scuba diver is to ensure proper weighting when diving, With proper weighting, there is more control for the diver when a safety stop is required. There is less need to carry excess weight that increases drag and gas consumption.
