Answer:
a. 5.360m/s
b. -1.1m/s
c. 3.38m/s
Explanation:
V1 = 3.20j
V2 = 4.30i
Vp = 5.4(-i)
= -5.40i
a. Speed of boat 2 relative to shore
= v1 + v2
= 3.2j + 4.3i
Magnitude = √3 2²+4.3²
= √28.73
= 5.360m/s
b. Speed of passenger relative to boat 1
V(p,1) = vp + v2
= -5.40i + 4.3i
= -1.1m/s
c. Speed of passenger relative to share
V(p,s) = vp + v(2,s)
= -5.4i + 4.30i +3.2j
= -1.1i + 3.2j
Take magnitude
= √-1.1²+3.2²
= √ 1.21 +10.24
= √11.45
= 3.38m/s
When a rock is pick up and thrown it's showing potential energy
Answer:
258 Hz or 266 Hz
Explanation:
When two sounds of similar frequency occur at the same time, a phenomenon called "beat" occurs. The beat is an interference patter between the two sounds; the frequency of this beats (called beat frequency) is given by the difference between the frequencies of the two sounds:
where
is the beat frequency
is the frequency of the 1st sound
is the frequency of the 2nd sound
In this problem,
is the beat frequency
is the frequency of the middle C tuning fork
is the frequency of the middle C piano string
Solving for f2, we find two solutions: