I personally think the answer is B.
<span>"Non-
horizontal rock layers were tilted or folded after they were originally
deposited; this makes the law of superposition challenging to use."</span>
Hoped I helped!
You put your 5 fingers up then you put 4 fingers up on the same hand
Answer:
θ = 53.7°
Explanation:
Given:
- The mass of ball = M
- The mass of object = 3M
- The wire length L = 0.5 m
- The velocity of ball vi = 4.0 m/s
- The velocity of ball vf
- The velocity of object Vf
Find:
Find the maximum angle through which the block swings after it is hit.
Solution:
- When two objects collide with no external force acting on the system the linear momentum of the system is conserved. The initial (Pi) and final (Pf) linear momentum are equal:
Pi = Pf
M*vi = M*vf + 3M*Vf
vi = vf + 3*Vf
4 = vf + 3*Vf
- For elastic collision between two particles the relative velocities before and after collision have the same magnitude but opposite sign; so,
vi - 0 = Vf - vf
4 = Vf - vf
- Solve the above two equation simultaneously.
8 = 4*Vf
Vf = 2 m/s
vf = -2 m/s
- When the ball hits the object it swing under the influence of gravity only. Hence, no external force acts on the object so we can apply the conservation of energy as the object attains a height h.
ΔK.E = ΔP.E
0.5*(3M)*Vf^2 = (3M)*(g)*(h)
h = Vf^2 / 2*g
- Plug in the values:
h = 2^2 / 2*9.81
h = 0.2039 m
- We can see that the maximum angle can be given as θ according trigonometric relation as follows:
θ = arccos [ ( L - h ) / L ]
θ = arccos [ ( 0.5 - 0.2039 ) / 0.5 ]
θ = 53.7°
Answer:
5.90 ft/s^2
Explanation:
There are mixed units in this question....convert everything to miles or feet
and hr to s
28 mi / hr = 41.066 ft/s
Displacement = vo t + 1/2 at^2
599 = 41.066 (8.9) + 1/2 a (8.9^2)
solve for a = ~ 5.90 ft/s^2
Answer:
1.The main advantage of an electromagnet over a permanent magnet is that the magnetic field can be quickly changed by controlling the amount of electric current in the winding. However, unlike a permanent magnet that needs no power, an electromagnet requires a continuous supply of current to maintain the magnetic field.
