17 is the atomic mass of chlorine
Answer:
true
Explanation:
this is because potienal energy is energy that is stored, and kinetic is energy being used, as kinetic is used, potential is also being used.
(89000/102000)×100
=87.25%
(92000/104000)×100
=88.46%
efficiency is (output/input)×100
if u get confused which way input and output should go, remember the smaller value is always output and it's above in the fraction, then only it's possible to get a efficiency lower than 100.
Answer:

Explanation:
The impulse-momentum theorem states the impulse on an object is equal to the change in momentum of that object. Momentum is given by
. Since mass is constant, the train's change in momentum is:
(two significant figures).
Impulse is also given as
, where
is the average force applied and
is change in time. Since
is given as
, we have the following equation:
(two significant figures).
Answer:
A compound
Explanation:
2 or more elements mean its a compound