Answer:
Electromagnetic cranes are used to separate copper from iron in a scrap yard. The current is switched on to energies the electromagnet and pick up the iron pieces from the scrap. Then these iron pieces are moved to another position, the electromagnet in switched off and the iron pieces are released.
Explanation:
Answer:
245°C
Explanation:
Properties of steam at 90°C
to find dryness fraction
v is the specific volume,
0.0546=0.001035+x(2.39-0.001035)
x=0.0224
When all water will covert in vapor steam then
volume
Now from steal table we can say that temperature corresponding to vapor volume is 245°C.
Answer:
Explanation:
1500 m (100cm/m) / 3 cm/yr = 50 000 yrs.
The rotational speed of the two children is the same.
In fact, it is defined as
where
is the angle covered in the time
. As it can be seen, this quantity does not depend on the distance from the centre, so the rotational speed is 4.0 revolutions per minute for both children.