Answer:
4 Because Hypothesis sentence always have to be "If" and Then a "then"
Answer:
Series equivalent resistance: 
Parallel equivalent resistance: 
Explanation:
The equivalent resistance in series circuit is calculated as
The equivalent resistance in parallel circuit is calculated as
Which can be simplified to
The parallel circuit has the higher equivalent resistance as compared to series circuit.
Answer:
Answer in Explanation
Explanation:
Whenever we talk about the gravitational potential energy, it means the energy stored in a body due to its position in the gravitational field. Now, we know that in the gravitational field the work is only done when the body moves vertically. If the body moves horizontally on the same surface in the Earth's Gravitational Field, then the work done on the body is considered to be zero. Hence, the work done or the energy stored in the object while in the gravitational field is only possible if it moves vertically. This vertical distance is referred to as height. <u>This is the main reason why we require height in the P.E formula and calculations.</u>
The derivation of this formula is as follows:
Work = Force * Displacement
For gravitational potential energy:
Work = P.E
Force = Weight = mg
Displacement = Vertical Displacement = Height = h
Therefore,
P.E = mgh
Answer:
There are three types of magnets: permanent magnets, temporary magnets, and electromagnets. Permanent magnets emit a magnetic field without the need for any external source of magnetism or electrical power.
The Earth's magnetic field is believed to be generated by electric currents in the conductive iron alloys of its core, created by convection currents due to heat escaping from the core.
Explanation:
Answer:
The skier’s speed on the two level stretches are 22.13 m/s and 27.29 m/s.
Explanation:
Given that,
Slope down = 32°
Height = 25 m
Before leveling,
Slope down = 20°
Height = 38 m
We need to calculate the skier’s speed on the two level stretches
Using formula of energy
For first stretch,
Height = 25 m
Put the value into the formula
For second stretch,
Height = 38 m
Put the value into the formula
Hence, The skier’s speed on the two level stretches are 22.13 m/s and 27.29 m/s.
