Answer:
a) 
, b) 
, c) 
Explanation:
a) The initial potential energy is:
b) The efficiency of the bounce is:
c) The final speed of Danielle right before reaching the bottom of the hill is determined from the Principle of Energy Conservation:
Answer:
Work done on the box = 32 J
Explanation:
Work done = Force x Displacement.
Force applied on the box = 16 N
Displacement of box = 2 meter.
Work done on the box = Force applied on the box x Displacement of box
= 16 x 2 = 32 Nm = 32 J
Work done on the box = 32 J
We want a sound wave with a wavelength of 0.52 meters or a natural fraction thereof. We'll work in MKS.
w = 0.52/n
That's length. We have speed 344 meters/second so w corresponds to a frequency of
f = 344 / w = n (344/.52)
f = 661.5 n Hertz
I don't really agree with how they're saying it, but all the fundamental talk is probably trying to tell us n=1,
Answer: 661.5 Hertz
Any multiple of that will also produce constructive interference; we can go to about n=30 before we're out of the audio range.
Answer:
3. you need to ask your available lab instructors what to do.
4. You immediately have to drop down your cloth and roll it to extinguish the fire or move to the emergency shower if available
5. You have too keep calm and report to the lab instructor but do no shout.
6. Move immediately to the eye rinse basin if available and wash your eyes gently and thoroughly
