<span>In mantle convection currents, hotter rock moves __upward_____, while cooler rock moves __downward_____.</span>
Answer:
Explanation:
Initial angular speed of the player is given as
here we know that
now we know that
now its speed comes to zero in 0.2 s
so angular acceleration is given as
Answer:
a) 264.74 N
b) 91.15 N
c) 20.12°
Explanation:
Given:
Angle between the rope and the vertical, θ = 19°
Tension in the rope, T = 280 N
For the system to be in equilibrium,
The net force in vertical as well as in horizontal direction, should be zero
Therefore,
a) For Vertical direction
Weight of the child = vertical component of the tension
W = T cosθ ..............(1)
or
W = 280 cos19° = 264.74 N ............(a)
b) For horizontal
force on the child, F = T sinθ .............(2)
or
F = 280 sin19° = 91.15 N
c) Now, on dividing (1) and (2), we have
W/F = Tcosθ/Tsinθ
or
tanθ = F/W
now, for F = 97 N
tanθ = 97/264.74 = 0.3663 (W from (a))
or
θ = tan⁻¹(0.3663)
or
θ = 20.12°
The answer for the structures that are responsible for connecting bones is B
Answer:
the average kinetic energy of the 10 molecules is 10 J.
Explanation:
Given;
energy on one molecule in motion, E = 100 J
number of molecules, n = 10
(A) The average kinetic energy of the 10 molecules
since the remaining 9 molecules are at rest, their kinetic energy = 0
Therefore, the average kinetic energy of the 10 molecules is 10 J.
