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
ladessa [460]
3 years ago
12

An ocean fishing boat is drifting just above a school of tuna on a foggy day. Without warning, an engine backfire occurs on anot

her boat 1.0 km away. How much time elapses before the backfire is heard by the fish (a)
Physics
1 answer:
otez555 [7]3 years ago
3 0

Answer:

0.641 seconds

Explanation:

Distance (d) = 1.0 km

Using the relation :

Speed = distance / time

Time = distance / speed

Speed of sound in seawater is about 1560 m/s

Distance = 1.0km =

1km = 1000m

Time = 1000 / 1560

Time = 0.6410256

Time = 0.641 s

You might be interested in
I meed help with these 2 questions plz
ludmilkaskok [199]

-- 30N

-- the sum of all the forces

4 0
3 years ago
An electric pump rated 1.5 KW lifts 200kg of water through a vertical height of 6m in 10 secs: way is the efficiency of the pump
ruslelena [56]

Answer:

80%

Explanation:

Efficiency = Power output / Power input × 100 %

To calculate efficiency we need to find power output of electric pump.

We can use,

Work done = Energy change

Work done per second = Energy change per second

Work done per second = Power

Therefore, Power = Energy change per second

                              = Change in potential energy of water per second

                              =mgh / t

                              = 200× 10×6 / 10

                              = 1200 W = 1.2 kW

Now use the first equation to find efficiency,

Efficiency = \frac{1.2}{1.5} × 100%

                = 80 %

8 0
3 years ago
1.How far is Object Z from the origin at t = 3 seconds?
GenaCL600 [577]

Answer:

Please find the answer in the explanation

Explanation:

1.) How far is Object Z from the origin at t = 3 seconds

The distance of the object Z from the origin will be the slope of the graph.

Slope = 4/2 = 2m

2.) Which object takes the least time to reach a position 4 meters from the origin ?

According to the graph given to the question above, object Z has the list time which is 2 seconds since object X does not start from the origin.

3.) Which object is farthest from the origin at t = 2 seconds?

The correct answer is still object Z because it has the highest slope.

4 0
3 years ago
Describe the motion of a swing that requires 6 seconds to complete one cycle. What is its period and the frequency? Round to the
shutvik [7]

Period = 6 seconds and frequency = 0.167Hz .

<u>Explanation:</u>

We have , the motion of a swing that requires 6 seconds to complete one cycle. Period is the amount of time needed to complete one oscillation . And in question it's given that 6 seconds is needed to complete one cycle. Hence ,Period of the motion of a swing is 6 seconds . Frequency is the number of vibrations produced per second and is calculated with the formula of  \frac{1}{t} . SI unit of frequency is Hertz or Hz. We know that time period is 6 seconds so frequency =   \frac{1}{t}

⇒ frequency = \frac{1}{time}

⇒ frequency = \frac{1}{6}

⇒ frequency = 0.167Hz

Therefore , Period = 6 seconds and frequency = 0.167Hz .

7 0
3 years ago
Which of the following is example of convection check all that apply
sladkih [1.3K]

Answer air circulating in a hot air balloon

Explanation:

6 0
3 years ago
Other questions:
  • 20. Threshold braking in the vehicle's braking system
    9·1 answer
  • Which of these pieces of evidence did NOT help in the development of the theory of plate tectonics?
    9·1 answer
  • Potential energy matter has a result of its ____ or ____.
    5·2 answers
  • Which of the following statements is true about hydrothermal vents?
    8·2 answers
  • Transistor heating up in tesla coil !!!! please help me.
    7·1 answer
  • Fill in the blank.
    5·1 answer
  • Which property of sound leads to the formation of sound?​
    15·1 answer
  • If a load of snow contains 3 tons it will weigh how many pounds
    9·1 answer
  • What is a major division between gravity and the electromagnetic force on one hand and the nuclear forces on the other?
    11·1 answer
  • An object is moving with a force 30N then hits a wall to a stop in 0.5s.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!