A dolphin has a mass of 125 kg and is moving along with 775 J of kinetic energy. How fast is it moving? (Hint: use the formula to solve for KE) Question 43 options:

12.4 m/s

3.52 m/s

0 m/s

6.2 m/s

3.52m/s

Explanation:

Kinetic energy is calculated as:

= 1/2mv²

where,

m = mass

v = velocity

Therefore,

775 = 1/2 × 125 × v²

775 = 62.5v²

v² = 775/62.5

v² = 12.4

v = ✓12.4

v = 3.52m/s

e) none of the above answers are correct

there is no correct list among the choices you've provided.

the list might look something like this:

-- baby human

-- piccolo

-- flute

-- soprano singer

-- trumpet

-- tenor singer

-- trombone

-- baritone singer

-- baritone horn

-- bass singer

-- tuba

since i had to make up the list myself, i made it easy on myself, and i didn't try to shuffle the string instruments and woodwinds into it too.