Answer:
A. Step-up voltage transformers have fewer turns in the primary than in the secondary winding.
Explanation:
A step-up transformer is a transformer that transform a lower voltage in input into a higher voltage in output.
The transformer equation states that:
where
Vp is the voltage in the primary winding
Vs is the voltage in the secondary winding
Np is the number of turns in the primary winding
Ns is the number of turns in the secondary winding
we can re-arrange the equation as
For a step-up voltage,
so
which implies also
so, the primary winding has fewer turns than the secondary coil.
Answer:
By velocity, they mean speed. The formula for speed is Frequency * wavelength= Speed. So your answer is l225.
Answer:
Kinetic energy cannot be negative
potential energy is a reference dependent quantity and it can be positive as well as negative both
Since potential energy is defined only for conservative force so it can not be found for friction force
Explanation:
Kinetic energy of an object is given by the formula
here we know that
m = mass of object that can not be negative
v = speed of the object and since its square is given here so it can not be negative
so Kinetic energy is always positive
potential energy is given as the energy due to the virtue of the position of object
so it is
so potential energy is a reference dependent quantity and it can be positive as well as negative both
Since potential energy is defined only for conservative force so it can not be found for friction force
Answer:
3.7 km
62.7175453187 seconds
Explanation:
t = Time taken
u = Initial velocity
v = Final velocity
s = Displacement
a = Acceleration
g = Acceleration due to gravity = 9.81 m/s²
The maximum altitude of the rocket is 750+875+2038.73598369 = 3663.73598369 m = 3.7 km
Time taken to reach the ground from max height 27.3301854818 seconds
Time to reach max height during free fall after stage 2 ends is 20.3873598369 s
Total time of flight is 10+5+20.3873598369+27.3301854818 = 62.7175453187 seconds
F=ma so a=F/m
ax=180/270=0.67m/s^2
ay=390/270=1.44m/s^2
Magnitude = sqrt((0.67^2)+(1.44^2))=1.59m/s^2
Direction- Tan(x)=0.67/1.44=0.47 Tan^-1(x)=25 degrees