Answer:
I will answer this in English.
He has 45 years.
a year has 365 days.
a day has 24 hours.
So he has:
45*365*24 hours = 394,200 hours.
His mass is 78 kg,
And we know that 1 slug = 1lbf*ft/s^2
Then, the first step is transform the 78 kg into lbf.
1kg = 2.2 lbf.
then 78kg = 78*2.2 lbf = 171.6lbf.
Now, the weight is m*g, where m is the mass and g is the gravitational acceleration, in this case the gravitational acceleration in ft/s^2 is:
g = 32.2 ft/s^2
Then the weight in slugs is:
W = 32.2ft/s^2*171.6lbf = 5,525.5 slugs
Answer:
The Angle between the vector A and B is 12.32°
Explanation:
Given data
|A×B|=32
|A|=10
|B|=15
To find
Angle α
Solution
From Cross product properties we know that

The Angle between the vector A and B is 12.32°
Answer:
(a)The current passes through the solenoid is 11.7 A.
(b) The new current will be one-fourth of the initial current.
Explanation:
Given that,
The number of turns per meter = 385
Diameter of solenoid = 17.0 cm =
m
Magnetic flux through core of solenoid
=
Tm²
(a)
Magnetic field B= 
T/amp m
Cross section area of the solenoid A= 
m²
The angle between magnetic field and cross section of the solenoid is 
The magnetic flux through a area A with magnetic fie;d B is





=11.7 A
The current of the solenoid is 11.7 A.
(b)

From the above equation it is clear that, the current is inversely proportional to the square of the diameter of a solenoid.
.
Consider d' be the new diameter of the solenoid .
Since the new diameter of the solenoid is double of the initial diameter.
That is d'= 2d.



⇒I=4I'

The new current will be one-fourth of the initial current.
here force between two particles is given by Coulomb's law where two particles will either repel or attract each other
this force of attraction or repulsion is given by the equation

here we know that
= two point charges
r = distance between two charges
so now we will substitute all values in it

so above is the force between two point charges