Which one of the following is legal variable names, type yes or no in front of each variable name? if not, state the reason.

a) computebudget
b) five+six
c) illegalname
d) legal name
e) 4u

Explanation:

A) computebudget - YES  is legal variable name.

B) five+six- NO.

A legal variable name cannot contain mathematical operator or in fact any operator + is used so not a legal variable

C)illegalname - YES

is legal variable name.

D) Legal Name: NO

A legal variable does not contain any space between it's name although it can have underscore sign

E) 4U - NO

A legal variable name cannot start with a digit.

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

the answer to your question is c