Answer:
1.10m/s
2.0.1m
3.5Hz
Explanation:
v=velocity, f=frequency and T=wavelength
1.v=ft
v=2x5
=10m
2.v=ft
100=1000T
divide both sides by 1000
T=0.1m
3.v=fT
25=5f
divide both sides by 5
f=5Hz
The correct answer to the question is : D) Be moving at a constant velocity.
EXPLANATION:
As per Newton's first laws of motion, every body continues to be at state of rest or of uniform motion in a straight line unless and until it is compelled by some external unbalanced forces acting on it.
Hence, it is the unbalanced force which changes the state of rest or motion of a body. Balanced force is responsible for keeping the body to be either in static equilibrium or in dynamic equilibrium.
As per the options given in the question, the last one is true for an object under balanced forces.
Answer: Executive Order on Protecting American Monuments, Memorials, and Statues against our country are public monuments, memorials, and statues.
Explanation: learned it last week
Answer:
Explanation:
A reference point is a place or object used for comparison to determine if something is in motion. An object is in motion if it changes position relative to a reference point. Objects that are fixed relative to Earth – such as a building, a tree, or a sign - make good reference points.
Answer: The boiling point of solution is
Explanation:
Elevation in boiling point:
where,
= boiling point of solution = ?
= boiling point of toluene =
= boiling point constant of toluene =
m = molality
i = Van't Hoff factor = 1 (for non-electrolyte)
= mass of solute = 7.94 g
= mass of solvent (toluene) = 69.2 g
= molar mass of solute = 254g/mol
Now put all the given values in the above formula, we get:
Therefore, the boiling point (in °C) of a solution is 112.16