SHOW ALL WORK USE g=9.8 m/s^2 An unknown tuning fork produces a beat frequency o
ID: 1306885 • Letter: S
Question
SHOW ALL WORK
USE g=9.8 m/s^2
An unknown tuning fork produces a beat frequency of 3Hz when played with a 440Hz fork and 8Hz when played with a 445Hz fork. What is the frequency of the unknown fork?
443 Hz
432 Hz
453 Hz
448 Hz
437 Hz
The image produced by a concave (diverging) lens is always:
smaller, upside down
larger, right-side up
smaller, upside down
smaller, right-side up
When light travels from air to glass, what happens to the wavelength and frequency?
both wavelength and frequency increase
wavelength increases and frequency stays the same
wavelength stays the same and frequency decreases
wavelength decreases and frequency stays the same
both wavelength and frequency decrease
wavelength stays the same and frequency increases
Match the quantity to the correct unit.
frequency
-
radians
seconds
meter
no unit
Watts
Hertz
period
-
radians
seconds
meter
no unit
Watts
Hertz
index of refraction
-
radians
seconds
meter
no unit
Watts
Hertz
wavelength
-
radians
seconds
meter
no unit
Watts
Hertz
Changing which quantity will alter the period of an oscillating spring?
the planet (gravity)
none, the period only depends on the spring constant.
the amplitude
the length
the mass
Waves on a 10 meter rope travel at 20 m/s. You shake the rope back and forth until you get a standing wave with a single antinode. Shaking it faster, you are able to get another standing wave with two antinodes. What is the wavelength and frequency of each standing wave?
1st harmonic:
wavelength =
frequency =
2nd harmonic:
wavelength =
frequency =
You attach a 100 gram mass to a spring and it stretches 5 cm. What is the spring constant? If you set the spring in simple harmonic motion, what will the period and frequency be?
spring constant =
period =
frequency =
A 600nm laser hits glass with an incident angle of 30
frequency
-
radians
seconds
meter
no unit
Watts
Hertz
period
-
radians
seconds
meter
no unit
Watts
Hertz
index of refraction
-
radians
seconds
meter
no unit
Watts
Hertz
wavelength
-
radians
seconds
meter
no unit
Watts
Hertz
Explanation / Answer
1)
437 Hz
-------------
2)
larger, right-side up
----------------
3)
wavelength decreases and frequency stays the same
-----------------
4)
fredq - Hz
peroid - sec
index of refraction - no units
wave lenght - meter
-----------------
5)
the mass
----------------
6)
first hormonic
wavelenght L = 10*2 = 20 m
freq = 20/20 = 1 Hz
second hormic
L = 10 m
freq f =20/10 = 2Hz
-----------------
7)
spring constant K = mg/x = 0.10*9.8/0.05 = 19.6 N/m
peroid = 2pi*sqrt(m/k) = 6.28*sqrt(0.1/19.6) = 0.448 sec
freq f = 1/T = 2.229 Hz
-----------------
8)
1*sin 30 = 1.7 sinr
r = 58.2 degrees
velocity = 3x10^8/1.7 =1.76 x10^8 m/s
wavwlenght L =600*1/1.7 = 353 nm
freq = does not change
-------------------
9)
from
1/15 + 1/v = 1/10
v = 30 cm
-------------------
10)
96= 36*c(100-20)
C =0.0333 cal/g.c
b)
96 = 36*1*(T-20)
T = 22.66 C
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.