Answer:
Explanation:
The torque exerted is given by
where
is the force applied
d = 3.10 cm = 0.031 m is the length of the lever arm
Substituting,
The equivalent of Newton's second law for rotational motion is:
where
is the net torque
I is the moment of inertia
is the angular acceleration
Solving the equation for I, we find
Answer:
speed of running
speed of working
speed of learning
Hope it helps! please mark as brainliest if it helps!
Explanation:
The right answer is
2) NaCl
In fact, from the definition of acid, all acids contain at least one atom of hydrogen. In the options given by the problem, all compounds contain at least one atom of hydrogen H, except for the NaCl: therefore, NaCl is not an acid.
Sodium sulfide formula is Na₂S.
Na is a group 1 element, it has one valence electron therefore it is ready to give that valence electron and form an ionic bond. Once it gives out the electron it becomes a positive ion - Na⁺
sulfur is a group 6 element, has 6 electrons its outer shell and needs to gain 2 more electrons to become stable. Once it gains 2 electrons it becomes a negative ion - S²⁻.
Since Na only gives out 1 electron, S²⁻ ion needs to take in 2 electrons, therefore forms an ionic compound with 2 Na⁺ ions.
decomposition of Na₂S is as follows;
Na₂S(s) --> 2Na⁺(aq) + S²⁻ (aq)