In a ballistic pendulum experiment, projectile 1 results in a maximum height h of the pendulum equal to 2.6 cm. A second projectile (of the same mass) causes the the pendulum to swing twice as high, 5.2 cm. The second projectile was how many times faster than the first?

The second projectile is times faster than the first projectile.

Explanation:

Mass of first projectile = m

height = 2.6 cm

Height = 5.2 cm

Let velocity of first projectile = V

Velocity of first projectile = V'

From conservation of momentum principal

m V = (m + m) V'

V' =

Therefore velocity is directly proportional to the height.

Since

Therefore the second projectile is times faster than the first projectile.

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.

according to jean piaget, in what stage of cognitive development are children able to understand conservation task?

b. preoperational

just took it