Answer:
5 Hz
Explanation:
In this case it is not necessary to take into account the frequency of the string for 5 nodes. Because of the superposition principle for waves, the new wave produced by Sally is only the frequency generated by her hand:
f = (20 times)/(4 s) = 5 Hz
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Answer:
Please see below as the answer is self explanatory.
Explanation:
- According to Newton's 2nd law, a net force acting on an object of mass m, causes the object to be accelerated.
- If the forces acting on the object are balanced, which means that the net force on the object is zero, just applying the same law, we find that the object is not accelerated.
- According to Newton's First law, an object that is not accelerated is at rest, or moves along a straight line at constant speed.
- So, if there are balanced forces acting on the object, if the object is at rest, will keep at rest, and if it is moving, it will keep moving at constant speed along a straight line.
Since each light year is approximately 9 trillion kilometres, 4.80 light years is 43.2 trillion kilometres, or 43,200,000,000,000,000 metres
Answer:
For copper, ρ = 8.93 g/cm3 and M = 63.5 g/mol. Assuming one free electron per copper atom, what is the drift velocity of electrons in a copper wire of ...
24 pages
Explanation:
Answer: vf = 51 m/s
d = 112 m
Explanation: Solution attached:
To find vf we use acceleration equation:
a = vf - vi / t
Derive to find vf
vf = at + vi
Substitute the values
vf = 3.5 m/s² ( 8.0 s) + 23 m/s
= 51 m/s
To solve for distance we use
d = (∆v)² / 2a
= (51 m/s - 23 m/s )² / 2 ( 3.5 m/s²)
= (28 m/s)² / 7 m/s²
= 784 m/s / 7 m/s²
= 112 m