The turn and voltage ratio of a transformer can be simply expressed by the equation:
Ns/Np = Vs/Vp; where N is the number of turns and V is the voltage.
Plugging in the given values, we have:
25 turns / 100 turns = Vs / 40 volts
Vs = 40 volts (25 turns/100 turns)
Vs = 10 volts
The answer is D.
Answer:
Graph D
Explanation:
The speed of sound in steel or any solid is faster than the speed of sound through air. This means the steel bar on the graph graph should be the larger of the two.
Answer:
Explanation:
The radial acceleration (also called centripetal acceleration) of an object in circular motion is given by
where
v is the speed of the object
r is the radius of the circular path
For the car in this problem,
v = 50 m/s
we know that the diameter of the track is d = 500 m, so the radius is
And so, the radial acceleration is
Answer:
The water releases energy which causes the water molecules to have less kinetic and potential energy, changing their configuration from liquid to solid.
Explanation:
The conversion of water to ice is a phase change from liquid to solid. There is no chemical action taking place in this process just the state of matter taking up a new form.
- This phase change is called freezing.
- In freezing, the liquid water loses energy to the surroundings.
- By so doing, the water molecules have lesser energy
- The then take up fixed position within the lattice.
- This changes the state to solid with a well - ordered arrangement.