Answer:
Tension, T = 2038.09 N
Explanation:
Given that,
Frequency of the lowest note on a grand piano, f = 27.5 Hz
Length of the string, l = 2 m
Mass of the string, m = 440 g = 0.44 kg
Length of the vibrating section of the string is, L = 1.75 m
The frequency of the vibrating string in terms of tension is given by :





T = 2038.09 N
So, the tension in the string is 2038.09 N. Hence, this is the required solution.
Answer:
0.2246 meters
Explanation:
.25-0.0254 meters = 0.2246 meters
Answer:
1) The angle of deflection will be less than 45° ( C )
2) The angle of deflection will be greater than 45° but less than 90° ( E )
Explanation:
1) Assuming that the force applied has a direction which is perpendicular to the Earth's magnetic field
∴ Fearth > Fapplied hence the angle of deflection will be < 45°
2) when the Fearth < Fapplied
the angle of deflection will be : > 45° but < 90°
Answer: <em>she will have to increase the factor of current by</em> 11
Explanation: The mathematical relationship between the strength of the magnetic field (B) created by a current carrying conductor with current (I) is given by the Bio-Savart law given below
B=
B=strength of magnetic field
I = current on conductor
r = distance on any point of the conductor from it center
u
= permeability of magnetic field in space
from the question, the investigator is trying to keep a constant magnetic field meaning B has a fixed value such as the constants in the formulae, the only variables here are current (I) and distance (r). We can get this a mathematical function.
by cross multipying, we have
B* 2πr=
<em>I </em>
by dividing through to make <em>I </em>subject of formulae, we have that
<em>I </em>= 
B, 2π and
are all constants, thus
= k(constant)
thus we have that
<em>I </em>=kr<em> (current is proportional to distance assuming magnetic field strength and other parameters are constant) </em>
thus we have that
=
=1cm and
=11cm
=
thus
=11* 
which means the second current is 11 times the first current
Answer:
It should be (A few centimeters per year) About three to five centimeters