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Rus_ich [418]
3 years ago
9

A train traveled 350km in 2.5h. what was the average speed of the train?

Physics
2 answers:
Salsk061 [2.6K]3 years ago
4 0

Answer:

The answer is 140km/h

Step by step Explanation:

  • Velocity is the variation in the position of an object in a given time, that is, it is the distance traveled by an object in a unit of time.
  • The velocity is expressed by the formula v = \frac{d}{t}
  • If we replace the values given in the velocity formula we will have:

        v = \frac{350km}{2.5h} \\v = 140 km/h

MaRussiya [10]3 years ago
3 0
Speed equals distance divided by time, so 350 divided by 2.5 equals 140 kilometers per hour.
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Which type of mountain is created when rock layers are pushed up by forces inside the Earth?
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Correct answer choice is :


B) Upwarped


Explanation:


An upwarped mountain is a mountain consisting of a large area of the Earth's coat that has led smoothly upward without much visible deformation and normally including sedimentary, igneous, and metamorphic rocks. Sedimentary rocks are set down in layers called beds or layers. A bed is described as a layer of rock that has a similar lithology and character. Beds form by the removal of layers of sand on top of each other.

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Sheila eats an energy bar right before she goes on a run. What energy changes will occur in sheila as she runs after eating?
LiRa [457]
The energy bar eaten by Sheila has chemical energy locked up inside it. This chemical energy is converted to mechanical energy in form of potential and kinetic energy and this in turn is converted to heat energy as the run progresses. Thus, the energy changes are: chemical energy to mechanical energy [kinetic and potential] and finally to heat energy.
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If a car has a mass of 200 kilograms and produces a force of 500 N, how fast will the car accelerate?
Hitman42 [59]

Answer:

2.5m/s²

Explanation:

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Mass of car  = 200kg

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Insert the given parameters and find the acceleration;

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A horizontal spring is attached to a wall at one end and a mass at the other. The mass rests on a frictionless surface. You pull
LenKa [72]

Answer:

54%

Explanation:

So, we have that the "magnitude of its displacement from equilibrium is greater than (0.66)A—''. Thus, the first step to take in answering this question is to write out the equation showing the displacement in simple harmonic motion which is = A cos w×t.

Therefore, we will have two instances t the displacement that is to say at a point 2π/w - a2 and the second point at a = a2.

Let us say that 2π/w = A, then, we have that a = A cos ^-1 (0.66)/2π. Also, we have that a2 = A/2 - A cos^- (0.66) / 2π.

The next thing to do is to calculate or determine the total length of of the required time. Thus, the total length is given as:

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