Average speed = distance traveled / time
average speed = (126.5 m * 3.5 laps) / (4.17 min)
= 106.2 m/min
The answer is a matter of opinion, and you're going to get different answers
from different people. Here's <u>my</u> take on it:
The writers, producers and advertising sponsors of these shows certainly
don't think they're boring. And <em><u>definitely</u></em> neither do the TV networks that
decide which ones to broadcast.
I'm not trying to say "The experts don't think they're boring, so you must
be wrong". I'm trying to say that different people have different opinions
about the same shows, and in <em>your</em> case,<em> you</em> find them boring.
My conclusion is this:
I think you're finding TV shows boring nowadays because you're growing
as a person. You've grown, developed, and matured to the point where
you're above the level of audience that the shows are pitched for. That's
a very good thing !
You're sad because you used to get pleasure and entertainment from TV,
and now it doesn't give you those things. That's like losing an old friend,
that you used to have such fun playing with, but he just doesn't do it for
you any more.
Now that you've grown up, you've made new friends. With them, you do
things that you wouldn't even understand with your younger friends. And
you develop new interests, like ... I don't know ... books, movies, hobbies,
your church, your profession, learning new things, developing new skills,
exercising your brain, writing, volunteer work, ham radio, building fine
furniture, singing, learning to write music, raising tropical plants, sculpture,
politics ... whatever turns you on. Some people never grow past the stage
where staring at the tube is all they need in life, because they don't have
what it takes to be interested in anything else. Those are the people that
TV is aimed at. But you have more, and that's why TV isn't enough for you.
There are other possible reasons why TV bores you. But until I know more
about you, I think it's a very, very good sign.
1. The time for a radioactive sample to reduce to half of its original mass.
4. 10% of 232 is 23.2 times 6 equals 139.2
68.9 x6 equals 413.4
5. 0.37kg
6. 2000 years
7. 6.84 seconds
The velocity is 60 because you divide your distance by your time (240÷4=60)
Answer: 2.75 1/sec
Explanation:
The only external force (neglecting gravity) acting on the puck, is the centripetal force, which. in this case, is represented by the tension in the string, so we can say:
T = mv² / r (1)
Our unknown, is the frequency at which the puck can go around the circle, which is the inverse of the period Tp.
By definition, a period is the time needed by the puck to complete one entire circle.
By definition also , angular velocity is the rate of change of the angle advanced, so we can express this way:
ω = ∆θ / ∆t
The angle advanced during one period, is exactly (by angle definition) 2 π radians.
So, we can always write the angular velocity, ω, as follows:
ω = 2π / Tp = 2πf
Now, there is a relationship between linear and angular velocity, that can be found applying simply the definition of velocity and of an angle too, as follows:
v = ∆s / ∆t = r ∆θ/∆t = ω r
Replacing in (1), we have:
T = mω2 r2 / r = m ω2r (2)
We have just found that ω= 2πf, so, replacing in (2) :
T = m (2π)2 f2 r
Solving for f:
f = 1/2π√(T/mr) = 1/2π 17.28 1/sec = 2.75 1/sec
