Answer:
It is impossible to detect underground water from the surface. Dowsing practitioners refuse to explain their secrets.
Explanation:
Answer:
3.125J
Explanation:
K.E.= 1/2(mass)(velocity)^2
K.E.=1/2(0.25)(5)^2=3.125
I’m sure “save” is the correct answer, as it is the only grammatically correct answer choice. Also, it is easy to save when you know what you’ll have to pay for in the future.
Answer:
The magnitude of the applied force is 94.74 N
Explanation:
Mass of the block, m = 11 kg
Angle of inclination of the plane,
Friction coefficient,
Now,
Normal force that acts on the block is given by:
(1)
Now, to maintain the equilibrium parallel to ramp the forces must be balanced.
Thus
(2)
From eqn (1) and (2)
F = 94.74 N
Alkali metal
Explanation:
In general, an alkali metal will be more reactive than an alkaline earth metal in the same period.
What determines reactivity of metals?
The electropositivity of metals determines how reactive they are.
- Electropositivity or metallicity is a measure of the tendency of atoms of an element to lose electrons.
- It is closely related to ionization energy and the electronegativity of an element.
- The lower the ionization energy of an element, the more electropositive or metallic it is
- Also, the more reactive it will be because, it can lose electrons more readily.
- Across a period from left to right, electropositivity decreases and from top to down a group, it increases.
- Since alkali metals are more electropositive than alkali earth metals, they are more reactive and readily lose their only electron.
- This is why the most reactive metal is francium found in the lower left corner on the periodic table.
- For non-metals, electronegativity is the most important factor.
Learn more:
Alkali metals brainly.com/question/6324347
Electronegativity brainly.com/question/11932624
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