6 Type the correct answer in each box.
Scientists often have to deal with numbers that are either very large or very small. For example, the radius of the Sun is approximately 696,000
kilometers, while bacterial cells are as small as 1.9 x 10-4 millimeters. Express each number in an alternate form.
In scientific notation, the radius of the Sun is $6,050 x 10
kilometers.
In expanded notation, each bacterial cell is
millimeters wide.
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first let us lay out the formula for potential

and kinetic energy:

pe = mgh

ke = (mv^2)/2

where: m=mass, v=velocity, g=gravitational

acceleration, h=height

calculating for mass using the known values of

pe:

340j = m (9.81 m/s^2) (50ft) (1m/3.28ft)

m = 2.27 kg

the law of conservation of energy states that

energy is neither created nor destroyed. therefore, the change in kinetic

energy from 50 ft to 35 ft would be equal to the change in potential energy

from 50 ft to 35 ft. however it would be opposite in signs since one is losing

while other is gaining.

ke(35ft) – ke(50ft) = - [ pe(35ft) – pe(50ft]

ke(50ft) = 0 since the brick is initially at rest

ke(35ft) = 340j - 2.27kg (9.81 m/s^2) (35ft)

(1m/3.28 ft)

ke(35ft)

= 102.38 j

1 is the answer to this problem