Answer:
Explanation:
On the rod , three forces are acting .
1 ) its weight from the middle point .
2 ) Tension in the wire in the horizontal direction
3 ) reaction force by the hinge which balances the other two forces
Now taking moment of forces acting on the rod about the hinge
and equating opposite moment
3.7 x 9.8 x .6 x cos 25 = T x .51 ( T is tension in the horizontal wire)
T = 38.6 N
a )
The horizontal component of the force exerted on the rod by the hinge
will balance the tension in the wire acting in horizontal direction so it will be equal to
38.6 N
b ) The vertical component of the force exerted on the rod by the hinge
will balance the weight of rod so it will be equal to
3.7 x 9.8 N
= 36.26. N
=
False because anti-lock brake system will activate automatically.
The power in watts is the energy in Joules used per second. This is:
P [W] = E[J] / t[s]
Solving for Energy:
E = P*t
We must convert the time to seconds knowing that 1 min = 60 s:
t = 6 min × 60 = 360 s
Finally:
E = P*t
E = 133 W * 360 s
E = 47880 J
<h2>The work of the runner is 47880 J</h2>
Answer:
34g
(second option listed)
Explanation:
half life is the number of days it takes to decrease by half,
after 8 days you are left with half of the original portion
in a period of 32 days, we experience 4 repeats of 8 days
(it gets cut in half four times):
544 / 2 = 272 {<em>day 8</em>}
272 / 2 = 136 {<em>day 16</em>}
136 / 2 = 68 {<em>day 24</em>}
68 / 2 = 34 {<em>day 32</em>}
so, after 32 days, 34g of ooblek are left un-decayed
hope this helps!! have a lovely day :)
