A 10,000-watt radio station transmits at 535 kHz.
1 answer:
You might be interested in
Answer:
a) v = 16.57 m / s, b) a = 19.6 m / s², d) N = 1.76 10³ N, N / W = 3
Explanation:
This exercise looks interesting, but I think you have some problem with the writing, the questions seem a bit disconnected from the initial text.
Let's answer the questions.
a) For this part we can use energy considerations.
Starting point. The upper part of the trajectory indicates that the arm is horizontally
Em₀ = U = m g h
in this case h = r
Final point. For lower of the trajectory
Em_f = K = ½ m v²
as they indicate that there is no friction
Em₀ = em_f
mgh = ½ m v²
v =
let's calculate
v =
v = 16.57 m / s
b) the centripetal acceleration has the formula
a = v² / r
a = 16.57² / 14.0
a = 19.6 m / s²
c) see attached where the diagram is
where N is the normal and w the weight
d) let's use Newton's second law
N-W = m a
N - mg = m ar
N = m (g + a)
let's calculate
N = 60.0 (9.8 + 19.6)
N = 1.76 10³ N
the relationship with weight is
N / W = 1.76 10³/( 60 9.8)
N / W = 3
normal is three times greater than body weight
e) the answer is reasonable since by Newton's first law the body must continue in a straight line, therefore to change its trajectory a force must be applied to deflect it
I added a screenshot with the complete question
<span><u><em>Answer:</em></u>
D. Ask her instructor questions about it the next day
<u><em>Explanation:</em></u>
We are given that Lana doesn't understand everything she's supposed to learn from the homework.
<u>Let's check the options:</u>
<u>1- start working on it eve earlier</u>
We know that she works on the homework as soon as she can. Working on it even earlier will not help her understand the difficult parts
<u>2- put it off until she's ready to work on it</u>
This is not the best option as it wont help her understand difficult parts. On the contrary, she might lose the time she has to practice the parts she understands and gain as much knowledge as possible
<u>3- Only work on it directly before going to class.</u>
this is the same as option 2. She might not even be able to finish it before the class
<u>4- Ask her instructor questions about it the next day</u>
This is the best solution as it will help her recap what she needs to learn and understand any difficult concepts as soon as possible which will help optimize her benefits
Hope this helps :)</span>
<span><u><em>Answer:</em></u>
D. Ask her instructor questions about it the next day
<u><em>Explanation:</em></u>
We are given that Lana doesn't understand everything she's supposed to learn from the homework.
<u>Let's check the options:</u>
<u>1- start working on it eve earlier</u>
We know that she works on the homework as soon as she can. Working on it even earlier will not help her understand the difficult parts
<u>2- put it off until she's ready to work on it</u>
This is not the best option as it wont help her understand difficult parts. On the contrary, she might lose the time she has to practice the parts she understands and gain as much knowledge as possible
<u>3- Only work on it directly before going to class.</u>
this is the same as option 2. She might not even be able to finish it before the class
<u>4- Ask her instructor questions about it the next day</u>
This is the best solution as it will help her recap what she needs to learn and understand any difficult concepts as soon as possible which will help optimize her benefits
Hope this helps :)</span>