You would divide 6 into 1000 so your answer is B. 166
Answer:
The current through the tube is 73.39A.
Explanation:
The relationship between the resistivity
, the electric field
, and the current density
is given by

This equation can be solved for
to get:

Since the current is 

Now, for the tube of mercury
,
, and the area is
; therefore,


Hence, the current through the mercury tube is 73.39A.
When force is applied on an object the object will not slide
So here object will remain in equilibrium after applying the force
So in this case the condition of equilibrium is maintained due to friction force that is applied on the object.
So here for equilibrium be can say

also we know that

we are given that
( applied force on the box)


So here this friction force on the cart is known as static friction

I posted this because I got it correct. The answer is 28J.
Answer : The correct option is, (B) 279.2 Kpa
Solution : Given,
Initial pressure of gas = 475 Kpa
Initial volume of gas =
Final volume of gas =
Initial temperature of gas = 290 K
Final temperature of gas = 277 K
Using ideal gas equation :
Formula used :

where,
= initial pressure of gas
= final pressure of gas
= initial volume of gas
= final volume of gas
= initial temperature of gas
= final temperature of gas
Now put all the given values in the above formula, we get the final pressure of the gas.


Therefore, the absolute pressure of the gas after expansion is, 279.2 Kpa