Answer:
2 revolutions.
Explanation:
We need to obtain the angular velocity when he is in the air.
The angular momentum is given by:
Because of angular momentum conservation L1=L2, so the final angular velocity is given by:
We need to calculate the time the skater is in the air, so we need to use the formula of parabolic motion:
so the time taken is 1.26s
the angular displacement is given by:
the number of revolutions is given by:
the skater execute two complete revolutions in the air.
Answer:
Explanation:
3.5 cycles/s(1.3 m/cycle) = 4.55 m/s
Answer:
A variable (often denoted by x ) whose variation does not depend on that of another.
Explanation:
Answer:
Hello your question is poorly written below is the complete question
Suppose the battery in a clock wears out after moving Ten thousand coulombs of charge through the clock at a rate of 0.5 Ma how long did the clock run on does battery and how many electrons per second slowed?
answer :
a) 231.48 days
b) n = 3.125 * 10^15
Explanation:
Battery moved 10,000 coulombs
current rate = 0.5 mA
<u>A) Determine how long the clock run on the battery. use the relation below</u>
q = i * t ----- ( 1 )
q = charge , i = current , t = time
10000 = 0.5 * 10^-3 * t
hence t = 2 * 10^7 secs
hence the time = 231.48 days
<u>B) Determine how many electrons per second flowed </u>
q = n*e ------ ( 2 )
n = number of electrons
e = 1.6 * 10^-19
q = 0.5 * 10^-3 coulomb ( charge flowing per electron )
back to equation 2
n ( number of electrons ) = q / e = ( 0.5 * 10^-3 ) / ( 1.6 * 10^-19 )
hence : n = 3.125 * 10^15