subtract the first number with the second number
a) 12,-5
b) -12, 8
c) -225, -135
d) 1001,101
Answers
Step-by-step explanation:
euruueururururuurururuhrhrhrhhrhrrhhdududjrjrjrjjrjfhfhfhhfhfhhfhfhfhfhhfhrhfhhfhfhfhrhrhhrhrjrhrhQ.4- What is the principle on which a machine
works?
A.4- The work output of a machine is equal to the
work input. All machines work on the principle that
when the effort is smaller than the load, it has to
move a greater distance in order to achieve the
same work.
Q.5- Define the term efficiency of a machine.
A.5- The efficiency of a machine is the ratio of the
useful work done by the machine to the work put into
the machine by the effort.
Q.6- What is an ideal machine?
A.6- An ideal machine is the one in which no part of
the work done on the machine is wasted. For an
ideal machine, the work output is equal to the work
input. The efficiency of an ideal machine is 1.
Q.7- Can a machine have an efficiency of 100%?
A.7 No, a machine do not have an efficiency of
100%. Efficiency of a machine is always less than
Step-by-step explanation:
the scientific study of the structure of substances and what happens to them in different conditions or when mixed with each other