1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
mr_godi [17]
3 years ago
5

If a tree falls in the middle of the woods and nobody is around to hear it, does it make a sound?

Physics
2 answers:
solong [7]3 years ago
7 0
Yes, everything falling will make a sound unless it is air.
Pavlova-9 [17]3 years ago
6 0
Yes because even if WE couldn't hear it, the tree still makes a sound itself since its hitting the ground with its weight, it makes a dropping noise, animals could still hear it as well, but if nothing is around it, it still makes noise, its just the sound doesn't travel fast/big enough for us to hear it from long distance.
You might be interested in
A physicist's right eye is presbyopic (i.e., farsighted). This eye can see clearly only beyond a distance of 97 cm, which makes
Ivan

Answer:

f = 19,877 cm   and  P = 5D

Explanation:

This is a lens focal length exercise, which must be solved with the optical constructor equation

        1 / f = 1 / p + 1 / q

where f is the focal length, p is the distance to the object and q is the distance to the image.

In this case the object is placed p = 25 cm from the eye, to be able to see it clearly the image must be at q = 97 cm from the eye

let's calculate

        1 / f = 1/97 + 1/25

        1 / f = 0.05

        f = 19,877 cm

the power of a lens is defined by the inverse of the focal length in meters

         P = 1 / f

         P = 1 / 19,877 10-2

         P = 5D

5 0
3 years ago
If you traveled 90 km in 0.50 hours, what <br><br> was your average speed
Alinara [238K]

Average speed = distance / time

Average speed = 90 km / 0.5 hrs

Average speed = 180 km per hour

8 0
3 years ago
You are operating a pwc in an area where swimmers are in the water. When must you slow your pwc to "slow, no wake speed"?.
Lostsunrise [7]

You should slow your pwc to "slow, no wake speed" when within 100 feet of anchored vessels or non-motorized craft.

<h3>What is Slow-no-wake?</h3>

This is the process of operating a personal watercraft at the slowest possible speed.

This helps to maintain steerage which prevents different forms of accident or risks when in motion in the water.

Read more about Slow-no-wake here brainly.com/question/10410716

#SPJ1

4 0
2 years ago
If you wanted the pitch of a horn to drop relative to an observer, which way would you move the horn, relative to where that obs
Vladimir [108]
We assume that horn releases sound of constant frequency. In order for observer to observe different frequency either horn or observer or both must move.

This happens due to Doppler effect. It states that when position of source of sound and observer relative to each other changes, the observed frequency also changes. If the source emits sound of constant frequency than observed frequency will be either higher or lower than original.

When distance between source and observer increases the observed frequency will be lower. This is because same number of sound waves must cover greater distance so they have greater wavelength.
When distance between source and observer decreases the observed frequency will be higher. This is because same number of sound waves must cover smaller distance so they have smaller wavelength. 

Wavelength and frequency are inversely proportional meaning when one increases the other drecreases.

From this explanation we can find answer for our question. <span>If we wanted the pitch of a horn to drop relative to an observer we need to move horn away from an observer.</span>
3 0
3 years ago
You are investigating an elevator accident which happened in a tall building. An elevator in this building is attached to a stro
Advocard [28]

Answer:

a) F = 2250 Ib

b) F = 550 Ib

c) new max force ( F newmax ) = 2850 Ib

Explanation:

A) The force the wall of the elevator shaft exert on the motor if the elevator starts from rest and goes up

max capacity  of elevator = 24000 Ibs

counterweight = 1000 Ibs

To calculate the force (F) :

we first calculate the Tension using this relationship

Counterweight (1000) - T =  ( 1000 / g ) ( g/4 )

Hence T = 750 Ib

next determine F

750 + F - 2400 = 2400 / 4

hence F = 2250 Ib

B ) calculate Tension first

T - 1000 = ( 1000/g ) ( g/4)

T = 1250 Ib

F = 2400 -1250 - 2400/ 4

F = 550 Ib

C ) determine design limit

Max = 2400 * 1.2 = 2880 Ib

750 + new force - 2880 = 2880 / 4

new max force ( F newmax ) = 2850 Ib

8 0
3 years ago
Other questions:
  • The earth is made mostly of metals and rocks. Where did this material come from? It was made by nuclear fission of uranium and o
    5·1 answer
  • A power source of 6.0 V is attached to the ends of a capacitor. The charge is 12 C.
    8·2 answers
  • I have a question to whoever can tell me (10 points)
    8·1 answer
  • Suppose you found a mineral crystal that looked like topaz. what two minerals could you use in a scratch test to help determine
    7·1 answer
  • Which statement best describes how waves carry energy?
    11·2 answers
  • Your friend clams that objects do not have to be thouching for a magnetic force to cause motion. How would you support your frie
    10·1 answer
  • A kind of variable that a researcher purposely changes in investigation is
    7·1 answer
  • 3.
    8·1 answer
  • Which way will the object accelerate if the forces given are the following
    9·1 answer
  • According to Newton's third law of motion, if you push against a wall, the wall will __________.
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!