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
podryga [215]
3 years ago
8

An airplane flies 1350km in 2 1/4 hours. What is its average speed in kilometers per hour?

Physics
1 answer:
Brut [27]3 years ago
8 0
600km since it would be 1350 divided by 2.25
You might be interested in
How do we find work from a force-displacement graph when the force exerted<br> is not constant?
Artemon [7]

Answer:

Explanation:

Read forces directly from the graph.

Read displacements directly from the graph.

Use the area under the graph to find the work done by the force. This is equal to the kinetic or potential energy the object gains due to the application of the force.

6 0
3 years ago
A fire engine is moving south at 35 m/s while blowing its siren at a frequency of 400 Hz.
vodomira [7]

To solve this problem we will apply the concepts related to the Doppler effect. The Doppler effect is the change in the perceived frequency of any wave movement when the emitter, or focus of waves, and the receiver, or observer, move relative to each other. Mathematically it can be described as

f_d= f_s \frac{(v+v_d)}{(v-v_s)}

Here,

f_d=frequency received by detector

f_s=frequency of wave emitted by source

v_d=velocity of detector

v_s=velocity of source

v=velocity of sound wave

Replacing we have that,

f_d = 400(\frac{(343+18)}{(343-35)})

f_d=422 Hz

Therefore the frequencty that will hear the passengers is 422Hz

8 0
3 years ago
3.
abruzzese [7]

Answer:

I think they use it at night because they want to avoid involving themselves in road accident while crossing the street. When there are reflective strips on their clothes, drivers do notice them even at far ends of the street since the strips will reflect the rays from the car lights to the driver,hence, the driver notifies that there is a pedestrian crossing and therefore slows down.

3 0
3 years ago
Using one or more of your senses to gather information is
valentinak56 [21]
It is called observation because you observe with your nose by semlling things your eyes by looking at things your ears by hearing things your tongue by tasting things and your hands by feeling things
3 0
3 years ago
Read 2 more answers
Identify five common business uses for electronic spreadsheets
Sloan [31]


For the answer to the question above
Forecasting how a business might do in the future. 
Calculating tax. 
Doing basic payrolls. 
Calculating Revenues. 
Producing charts. 

--Going past 5-- 

Inventory tracking 
Very (VERY) basic CRM for small businesses 
I hope my answer helped you. 
4 0
3 years ago
Read 2 more answers
Other questions:
  • Help fast please thsnks
    10·2 answers
  • A Honda Civic travels in a straight line along a road. The car’s distance x from a stop sign is given as a function of time t by
    7·1 answer
  • How much work (in J) is required to expand the volume of a pump from 0.0 L to 2.7 L against an external pressure of 1.0 atm?
    7·1 answer
  • What is determined by motion and the spacing of particles?
    9·1 answer
  • Explain why the speed of a sled is increases as it moves down a snow -covered hill, even though no one is pushing the sled
    10·1 answer
  • What must the condition of the alveoli be in order for gas exchange to occur
    10·1 answer
  • As a tennis ball is struck, it departs from the racket horizontally with a speed of 28.0 m/s. The ball hits the court at a horiz
    14·1 answer
  • How do objects at rest and in motion respond in the presence of an external, unbalanced force?
    13·1 answer
  • a force 4000 n accelerates a car of mass 800 kg from rest to 20 ms how far does the car travel while the force is acting?​
    7·1 answer
  • Help me with the following problem
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!