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
miss Akunina [59]
3 years ago
15

A submarine sends a signal and receives an echo after 5 seconds. Calculate the speed of sound if distance of object from submari

ne
in 3625m.
Physics
2 answers:
quester [9]3 years ago
8 0
Distance of d object frm submarine = 3625m
time taken = 5/2

then speed = 3625/5/2. (speed = distance /time)
=> 1450m/s


seldon.
Reil [10]3 years ago
3 0

speed = distance \div time
Since the sound travels from the submarine to the object AND back, it actually travelled 3625x2=7250m.

7250 \div 5 = 1450
Speed of sound: 1450m/s
You might be interested in
Three cars, car X, car Y and car Z, begin accelerating from rest,at the same time. Car X is more massive than car Y, which is mo
castortr0y [4]

Answer:

A) They all have the same amount of momentum

Explanation:

Newton's second law of motion gives an operational definition of force as the rate of change in momentum. It states that the rate of change in momentum of a body  is directly proportional to the applied force.

This is expressed as follows mathematically;

F=\frac{m(v-u)}{t}................. (1)

We can further simplify (1) above as follows;

Ft=m(v-u)................(2)

if initial velocity u = 0, then equation (2) becomes

Ft=mv...............(3)

This implies that change in momentum is equal to the impulse experienced by the body.

According to the problem stated, all the cars X, Y and Z are subjected to the same magnitude of force for the same time interval, hence irrespective of their masses they will all experience the same magnitude of change in momentum. Also, since they all began from rest, their velocities may differ as a result of their differences in mass, however their instantaneous momenta at end of the 10s will be the same.

The condition that would have warranted different momenta for them is if they had different initial velocities.

When different masses with a common initial velocity are subjected to the same magnitude of force for the same time interval, they will experience the same momentum at the end of the time interval although with different velocities. The smallest mass will have the highest velocity while the largest will have the lowest velocity at the end of the time interval.

5 0
3 years ago
Which of these is an example of electromagnetic induction? A current passing through a resistor uses power IR2. A current throug
Novosadov [1.4K]
Well as a pretty direct hint, recall that the word "induction" comes from the fact that electric fields are "induced" by (changing) magnetic fields
6 0
3 years ago
Which of the following are examples of radiation? (Choose all that apply)
olchik [2.2K]

Answer:

Explanation:

Visible light.

Infrared light.

Near ultraviolet light.

Microwaves.

Low frequency waves.

Radio waves.

Waves produced by mobile phones.

A campfire's heat.

4 0
3 years ago
A car moves with an average speed of 45 miles/hour. How long does the car take to travel 90 m
STALIN [3.7K]
It would take 2 hours
8 0
3 years ago
Read 2 more answers
Se dispara una bala con una velocidad de v = 300[m/s] contra un cascarón esférico de papel que gira con MCU respecto a un eje ve
Sladkaya [172]

Answer:

 w = 4.712 10⁻³ rad / s

Explanation:

For this exercise, the time it takes for the bullet to travel the distance of 2R must be equal to the time that the hole must travel half a circle.

Let's start by calculating the time it takes for the bullet, which is going at constant speed.

         v = x / t

         t = x / v

         t = 2R / v

         t = 2 0.10 / 300

         t = 6.666 10⁻⁴ s

As they ask that a single hole is formed in this time, it must be rotated half a circle, that is, θ =π rad, for which we use the angular scientific relations, where the shell has constant angular velocity

          w = θ / t

          w = π / 6,666 10⁻⁴

          w = 4.712 10⁻³ rad / s

7 0
3 years ago
Other questions:
  • __________ is best described as the process of transformation of an idea into a new product orprocess, or the modification and r
    5·2 answers
  • Great amounts of heat are found at hotspots. What is the source of this heat?
    14·1 answer
  • In binocular rivalry, you see one image in the left eye and an incompatible image in the right eye. what do you perceive?
    12·1 answer
  • How does a merry go round use potential and kinetic energy
    7·1 answer
  • An object moving with a speed of 21 m/s and has a kinetic energy of 140 J, what is the mass of the object.
    11·2 answers
  • A 3.5 kg book is sitting at rest on a table. what is the value of the normal force being exerted by the table on the book?
    9·1 answer
  • Why is the element carbon-14 important for paleontologist?
    14·2 answers
  • If every action has an equal and opposite reaction, then when you jump, and gravity pulls you back down, it also pulls the Earth
    14·1 answer
  • Sand is made of tiny pieces of rock that have been worn
    7·2 answers
  • A motor is used to pump water from a depth of 5m to fill a volume of 10cubic meter in 5 min . If 50 percent of the power is wast
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!