What is different between an ionic bond and a covalent bond?

a: an ionic bond is a bond between charged atoms, while a covalent bond is a bond between neutral atoms.

b: an covalent bond is a bond between charged atoms, while an ionic bond is a bond between neutral atoms.

c: an ionic bond shares electrons, while a covalent bond is an attraction between opposite charges.

d: an ionic bond is a bond between charged atoms, while a covalent bond is a bond between opposite charges.

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An alligator swims to the left with a constant velocity of 5 \,\dfrac{\text{m}}{\text s}5 s m ? 5, space, start fraction, m, divided by, s, end fraction. when the alligator sees a bird straight ahead, the alligator speeds up with a constant acceleration of 3 \,\dfrac{\text {m}}{\text s^2}3 s 2 m ? 3, space, start fraction, m, divided by, s, start superscript, 2, end superscript, end fraction leftward until it reaches a final velocity of 35 \,\dfrac{\text {m}}{\text s}35 s m ? 35, space, start fraction, m, divided by, s, end fraction leftward. how many seconds does it take the alligator to speed up from 5 \,\dfrac{\text {m}}{\text s}5 s m ? 5, space, start fraction, m, divided by, s, end fraction to 35 \,\dfrac{\text {m}}{\text s}35 s m ? 35, space, start fraction, m, divided by, s, end fraction?

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We put a force of 50n on an object and the acceleration is 100 m/s². what is the mass of the object?