Which of the following best describes why a white dwarf cannot have a mass greater than the 1.4 solar mass limit? A. White dwarf
1 answer:
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No force contributes to density, the density is a physical quantity that is defined as being 
the raport between the mass of the object and its volume. However if you want to measure the density of an object you might want to determine its gravity force (weight) 
from which knowing the gravitational acceleratin you can find its mass 
where
is given in Newtons and 
is given in 
where
Answer with Explanation:
We are given that
Resistance of solenoid,R=4.3 ohm
Magnetic field,B=
Current,I=4.6 A
Diameter of wire,d=0.5 mm=
Radius of wire,r=
Radius of solenoid,r'=1 cm=
Resistivity of copper,
We know that
Where
Using the formula
Number of turns of wire=
Number of turns of wire=
Hence, the number of turns of the solenoid,N=799
Magnetic field in solenoid,B=
Length of solenoid=12.5 cm
1m=100 cm