Answer:
Angle grinders are used mostly for copper, iron, steel, lead, and other metals.
Explanation:
I hope it helps! Have a great day!
Lilac~
Answer:
a)
, b) Yes.
Explanation:
a) The maximum thermal efficiency is given by the Carnot's Cycle, whose formula is:


b) The claim of the inventor is possible since real efficiency is lower than maximum thermal efficiency.
Answer:
The Current will decrease by a factor of 2
Explanation:
Given the conditions, it should be noted that the current in the circuit is determined by the LOAD. In other words, the amount of current generator will be producing depends upon the load connected to it.
Now, as the question says, the load is reduced to half its original value, we can write:


Since, P2 = P1/2,

Dividing equations (1) and (2), we get,
P1 / (P1/2) = I1/ I2

Hence, it is proved that the current in the transmission line will decrease by a factor of 2 when load is reduced to half.
Closest one is A. “The largest Vehicle”
Answer:
4A
Explanation:
From Ohms law ;
R= V/I where R is resistance, V is voltage and I is current
Given that;
R= 3Ω
V= 12
Using the values in the formula as;
R= V/I
3=12/I
I= 12/3
I= 4 A