Having and drinking hygienic
water is human right and is vital to life. The water should be tested, treated
and filtered to remove any contaminants that can lead do sickness. Some of the
strategies in which local municipality is implementing in <span>addressing the topic of lack of clean water are:
1. </span><span>Good monitoring of the water supplies
2. Desalination – </span>this is removal of mineral components from saline water
especially salt. The procedure is more expensive but is a way to reuse water <span>
<span>3. Campaign for more proficient and more wisely usage of the
water in order to make the people conscious of the fact how important the
natural resource water is.</span></span>
Answer:
a.)
I.) Open system
II.) Closed system
b.)
The total momentum of the object and earth system stay the same as the object fall toward the earth
The kinetic energy of the object increases as the object falls toward the earth.
Explanation:
a.)
I.) The system containing only the object is an open system because of the influence of external forces and presence of matters. External forces in this scenario means gravitational force acting on the object. And air is the matter that has influence on the object.
II.) The system containing only the object and earth is a closed system. Because in a closed system, there are no external dissipative forces acting on it. Universe is a closed system. And the mechanical energy of a close system is conserved. The mechanical energy will remain constant. In other words, it will not change (become more or less). This is called the Law of Conservation of Mechanical Energy.
b.) The total momentum of the object and earth system stay the same as the object fall toward the earth. Because momentum will always be conserved.
The kinetic energy of the object increases as the object falls toward the earth. When the object was initially at rest, kinetic energy equals zero
Answer:
Expression for angular resolution is;
θ = 1.22π/d
a) 0.85 light year
b) 2.15 x 10³ m
Explanation:
See attached images
Its C because the circuit is connected with battery and light bulb.
Explanation:
Given that,
Mass of the rocket, m = 2150 kg
At time t=0 a rocket in outer space fires an engine that exerts an increasing force on it in the +x−direction. The force is given by equation :
Here F = 888.93 N when t = 1.25 s
(c) We can find the value of A first as :
The value of A is 
.
(a) Let J is the impulse does the engine exert on the rocket during the 4.0 s interval starting 2.00 s after the engine is fired. It is given in terms of force as :
Limits will be from 2 s to 2+ 4 = 6 s
It implies :
(b) Impulse is also equal to the change in momentum as :
Hence, this is the required solution.
