Help me please it’s due right now review question help
2 answers:
Answer: E = 113 J
Explanation:
Mechanical energy is the sum of kinetic and potential energy
If we assume that ground level is the origin of the reference frame.
E = ½mv² + mgh
E = m(v²/2 + gh)
E = 0.400(23.0²/2 + 9.81(1.75))
E = 112.667 ≈ 113 J
Answer:
M.E = mgh
given, m=400g = 400/1000=0.4kg
h=1.75m
g=9.81m/s²
M.E =0.4×9.81×1.75
=6.867J
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An isotope is one of the forms of an element that has the same number of protons, but a different number of neutrons.
Answer:
m is expressed in kilograms and r in metres, with I (moment of inertia) having the dimension kilogram-metre square.
Average velocity = (x( 2.08 ) - x ( 0 )) / ( 2.08 s - 0 s )
x ( 2.08 ) = 1.42 * 2.08² - 0.05 * 2.08³ =
= 1.42 * 4.3264 - 0.443456 = 6.143484 - 0.443456 ≈ 5.7 m
v = ( 5.7 m - 0 m) / (2.08 s - 0 s ) = 5.7 / 2.08 m/s = 27.4 m/s
the electric conductivity of gold is very high
