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victus00 [196]
3 years ago
10

A bumblebee buzzes past you at 3 m/s. The frequency of the hum made by its wings is 152 Hz. Assume the speed of sound to be 342

m/s. What is the observed frequency of the hum as the bumblebee approaches you?
Physics
1 answer:
dsp733 years ago
6 0
As the bumblebee approaches me, the frequency of sound becomes higher than the 152 Hz because of the velocity with which the bee approaches at 3 m/s.

The speed of the bee causes me to detect an increase of frequency higher than 152 Hz.

This phenomenon is called Doppler Effect.

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What are some methods that astronomers use to study interstellar dust?
larisa [96]

Answer:

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6 0
3 years ago
A driver brings a car to a full stop in 2.0 s. If the car was initially
vagabundo [1.1K]

Answer:

\boxed {\boxed {\sf D. \  -11 \ m/s^2}}

Explanation:

Acceleration can be found by dividing the change in velocity by the time.

a=\frac{v_f-v_i}{t}

where Vf is the final velocity, Vi is the initial velocity, and t is the time.

Since the car came to a complete stop, it's final velocity was 0 meters per second.

The initial velocity was 22 meters per second.

The time was 2.0 seconds.

v_f=0 \ m/s\\v_i=22 \ m/s\\t= 2.0 \ s

Substitute the values into the formula.

a=\frac{0 \ m/s-22 \ m/s}{ 2.0 \s }

Subtract in the numerator first.

  • 0 m/s- 22 m/s = -22 m/s

a=\frac{-22 \ m/s}{2.0 \ s}

Divide.

a= -11 \ m/s^2

The acceleration of the car was -11 meters per square second. The negative acceleration indicates slowing down/stopping.

8 0
3 years ago
What happens if you jump on a shock absorbent mattress?
kkurt [141]

A shock absorbent mattress is built such that the boxspring of the bed absorbs pressure that is exerted to the bed. Hence, if you jump on the mattress, you would not bounce up and down as much as a normal mattress because the springs do not oscillate much. This is done to endure wear and tear. 

7 0
3 years ago
based on the creation of natural elements, what is most likely to be important to the modern iroquois culture?
Monica [59]

The Iroquois depended on the natural resources around them to meet all of their basic needs. Because they lived in the Eastern Woodlands of North America, their food, clothing, and shelter, as well as the materials for making their tools and weapons.Hunting tools were a bow and arrow, tomahawks and clubs. They ate corn, moose, beans and deer and many other foods. Beaver skin was used for capes.

They used reeds to make baskets and they used animal hides as clothing.

The Iroquois made weapons out of bones, wood, stones, and feathers. The Iroquois used wood, stone and feathers to make arrows.Hunting tools were a bow and arrow, tomahawks and clubs.

5 0
3 years ago
A proton is confined within an atomic nucleus of diameter 3.60 fm. part a estimate the smallest range of speeds you might find f
Cerrena [4.2K]
The answer for this problem would be:
Assuming non-relativistic momentum, then you have: 
ΔxΔp = mΔxΔv = h / (4) 
Δv = h / (4πmΔx) 
m ~ 1.67e-27 h ~ 6.62e-34,Δx = 4e-15 --> 
Δv ~ 6.62e-34 / (4π * 1.67e-27 * 4e-15) ~ 7,886,270 m/s ~ 7.89e6 m/s 
That's about 1% of the speed of light, the assumption that it's non-relativistic.
3 0
3 years ago
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