How much work is done to lift a 8.0 kg box from a height of 5.0 m to 12.0 m?

Work

⇒

W

=

98.1

J

Explanation:

It is assumed that the potential energy of objects located at

ground level is zero.

If the object is higher than the ground level, it gains potential energy

.

We can calculate the potential energy of objects above ground

level using the equation given below.

E

p

=

m

g

h

Where m:mass of object , h:height from ground level

E

p

=

5

⋅

9.81

⋅

2

E

p

=

98.1

J

A change in potential energy means that there is work done.

Work=change in potential energy

Work

⇒

W

=

98.1

J

Explanation:

hello, i am papaguy.

i have found an answer to your question but use it as information.

information: because weak acids/bases have low concentration of hydrogen ions, the addition of water has a large impact on the ph. 2. a difference in 1 unit is a 10x difference in concentration for example; a liquid with ph of 3 is 10x more acidic than a liquid with a ph of 4. therefore, a liquid with a ph of 3 is stronger.

best of luck!

96.77 amp

explanation:

rl = 250/100 = 2.5 ohms.

egl = 250 + (100 × 0.1) + 2 = 262 v.

at 700 r.p.m., eg2 = 262 × 700/1000 = 183.4 v.

if ia is the new current, then eg2 - 2 - (ia × 0.1) = 2.5 ia

which means this will give ia = 96.77 amp.