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
Marat540 [252]
3 years ago
5

a train travels 81 kilometers in 2 hours and then 88 kilometers in 2 hours what is its average speed​

Physics
1 answer:
Blababa [14]3 years ago
4 0

Average speed = total distance / total time

= (81 + 88) / (2 + 2)

= 169/4

= 42.25 kilometers/hour

Let me know if you have any questions.

You might be interested in
How does energy move through the atmosphere hydrosphere and biosphere
Anna11 [10]
<span>When the Sun’s energy moves through space, it reaches Earth’s atmosphere and finally the surface.  This radiant solar energy warms the atmosphere and becomes heat energy. This heat energy is transferred throughout the planet’s systems in three ways: by radiation, conduction, and convection</span>
5 0
3 years ago
Which of these is a chemical property of a substance?
My name is Ann [436]
Reactivity is a chemical property of substance
5 0
3 years ago
The moment of water from ocean through the atmosphere and back
melisa1 [442]

The water cycle is all about storing water and moving water on, in, and above the Earth. Although the atmosphere may not be a great storehouse of water, it is the superhighway used to move water around the globe. Evaporation and transpiration change liquid water into vapor, which ascends into the atmosphere due to rising air currents. Cooler temperatures aloft allow the vapor to condense into clouds and strong winds move the clouds around the world until the water falls as precipitation to replenish the earthbound parts of the water cycle. About 90 percent of water in the atmosphere is produced by evaporation from water bodies, while the other 10 percent comes from transpiration from plants.

There is always water in the atmosphere. Clouds are, of course, the most visible manifestation of atmospheric water, but even clear air contains water—water in particles that are too small to be seen. One estimate of the volume of water in the atmosphere at any one time is about 3,100 cubic miles (mi3) or 12,900 cubic kilometers (km3). That may sound like a lot, but it is only about 0.001 percent of the total Earth's water volume of about 332,500,000 mi3 (1,385,000,000 km3), If all of the water in the atmosphere rained down at once, it would only cover the globe to a depth of 2.5 centimeters, about 1 inch.

6 0
3 years ago
Read 2 more answers
Acceleration that causes objects to move in a circle is called .
murzikaleks [220]
Centripetal Acceleration
5 0
3 years ago
Which of the following statements about a metal wire in equilibrium are true? Select all that apply. There cannot be excess char
olga_2 [115]

Answer:

There may be excess charges in the interior of the wire

The net electric field everywhere inside the wire is zero

The interior of the metal wire is neutral.

There may be excess charges on the surface of the wire.

There is no net flow of mobile electrons inside the wire.

Explanation:

For any metal wire in equilibrium position, there may be excess charges in the interior of the wire and the net electric field everywhere inside the wire is zero. Additionally, the interior of the metal wire is always neutral and there is likely to be excess charges on the surface of the wire. Moreover, it's important to note that for a metal wire in equilibrium, there is no net flow of mobile electrons inside the wire.

3 0
3 years ago
Other questions:
  • A bag of cement weighing 325 N hangs in equilibrium from three wires. Two of the wires make angles of theta1=60.0 degrees and th
    6·1 answer
  • When you push a 1.90-kg book resting on a tabletop, you have to exert a force of 2.10 N to start the book sliding. Once it is sl
    5·1 answer
  • yesenia wants to bake cookies in her electric oven. the oven will transform electrical energy into ________ energy?
    9·2 answers
  • You stand on a straight desert road at night and observe a vehicle approaching. This vehicle is equipped with two small headligh
    11·1 answer
  • 2 decaliters + 800 deciliters = __________ liters?
    14·2 answers
  • A car is moving at high speed along a highway when the driver makes an emergency braking. The wheels become locked (stop rolling
    8·1 answer
  • A ball is falling from the second floor balcony to the floor below
    14·2 answers
  • 4. A cinder block is sitting on a platform 20 m high. It has a mass of 4 kg. The block has energy. Calculate it.
    8·1 answer
  • The photo shows a system that consists of a person on a diving board. What change could you make to the system that would decrea
    13·2 answers
  • Which term names the part of a sound wave by which frequency or pitch is measured?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!