Answer:
Explanation:
given,
diameter of string A = 0.5 mm
tension in string A = 440 N
diameter of string B = 1 mm
tension in string B = 820 N
wave speed =
M is the linear density that is mass per unit length =mass / length
mass = density x volume
from the above equation
now,
ratio of the wave speed Va/Vb is 1.47
Answer:
Actions
Explanation:
if u mean what are these called then it's actions
F=ma
f= 66 x 2
The answer is f = 132 N
You get it by
F=ma
F=66 X 2
Suppose earth is a soid sphere which will attract the body towards its centre.So, acc. to law of gravitation force on the body will be,
F=G*m1m2/R^2
but we now that F=ma
and here accleration(a)=accleration due to gravity(g),so
force applied by earth on will also be mg
replace above F in formula by mg and solve,
F=G*mE*m/R^2 ( here mE is mass of earth and m is mass of body)
mg=G*mEm/R^2
so,
g =G*mE/R^2