A. Is very attractive. If it's sublimation directly from water vapor in the air to ice on the glass, then yes. But from liquid water mist to water ice, no. Ice is less dense than water. That's why cubes float in your soda. Better leave 'A' alone. . . . D. Ice pellets turn to liquid. That one's good.
Answer:
Magnetic flux,
Explanation:
Given that,
Number of turns in the solenoid, N = 250
Current in the solenoid is, I = 9 A
Radius of the solenoid, r = 0.075 m
Length of the solenoid, l = 0.14 m
The magnetic flux is given by :
B is the magnetic field
A is the area of cross section
So, the magnetic flux through the circular cross-sectional area at the center of the solenoid is . Hence, this is the required solution.
False the strength off the magnet lessens the farther you get from it
Answer:
Explanation:
Given length is
Circumference of a circle is given as:
a.But the circumference is equal to length of the wire. Therefore circumference as a function of is:
b.Area as function of
Area is calculated as
Rewrite the circumference equation to make r the subject of the formula.
To express area as a function of :-
Therefore area of circle as a function of is
Answer:
The force of static friction acting on the luggage is, Fₓ = 180.32 N
Explanation:
Given data,
The mass of the luggage, m = 23 kg
You pulled the luggage with a force of, F = 77 N
The coefficient of static friction of luggage and floor, μₓ = 0.8
The formula for static frictional force is,
Fₓ = μₓ · η
Where,
η - normal force acting on the luggage 'mg'
Substituting the values in the above equation,
Fₓ = 0.8 x 23 x 9.8
= 180.32 N
Hence, the minimum force require to pull the luggage is, Fₓ = 180.32 N