The letter “j” is never found on the periodic table. As for numbers, there’s an infinite amount
2400joules
Explanation:
P.E
m= 20kg h=8m g=10m
P.E= 20×8×10
=2400joules
Answer:
C because it is in earth's mantle
26.6N
Using Hooke’s law
F = kx
Where F = force
K = spring constant
x = displacement
From the question
F= ?
K = 140 N/m
x = 0.19m
Therefore,
F = 140 x 0.19
= 26.6N
