Let us first concentrate and write down all the information's already given in the question. Based on the information's the answer to the question can be easily deduced.
Distance traveled by the train = 225 km
Time taken to travel the distance of 225 km = 2.5 hours
Then
Average speed = Distance traveled/Time taken
= 225/2.5 km/hour
= 90 km/hour
So the average speed of the train is 90 kilometers per hour. The procedure for doing this kind of problem is described and it is the simplest way of solving such problems. I hope you have understood the process and got the answer you were looking for.
First you need to calculate the velocity of the stone when it reaches the ground level. This is easy to find from energy conservation, since the potential energy it had at the top of the tower has been totally converted into kinetic energy.
We don't know the mass of the stone, but it cancels from both equations. This gives
so v=44.27 m/s.
Now, the time it took the stone to fall from the top of the tower to the ground is calculated easily from
.
The initial velocity is 0, the initial height is 100 meters and the final height is 0 since we are taking the ground floor as height 0.
This gives
So the time it took the stone to fall from the ground level to the bottom of the well is 5-4.52=0.48 s.
We can now use
where v is the velocity we calculated before v=44.27 m/s, time is t=0.48 s and xf is the depth of the well.
So the solution is 22.5 m
Answer:
The shortest possible distance is
Explanation:
From the question we are told that
The mass of the car is
The speed along the horizontal road is
The static friction coefficient is
The kinetic friction coefficient is
Generally the static frictional force acting on the car is mathematically represented as
Generally the force propelling the car is mathematically represented as
Here a is the maximum acceleration
at the point which the car stops ,
=>
=>
=>
=>
Generally from kinematic equation
Here v is the final velocity of the car and the value is zero given that the car comes to rest
So
=>
=>
Fractional distillation is the most efficient technique to separate solid benzoic acid mixed with a volatile alkyl halide liquid components.
<h3>Fractional distillation :</h3>
Separating a mixture into its constituent parts, or fractions, is known as fractional distillation. Chemical compounds are separated by heating chemical mixtures to a temperature at which one or more fractions of the mixture evaporate. Distillation is used to fractionate.
Boiling a mixture of liquids results in vapors rising up a glass tube known as a "fractionating column," which is followed by separation. The fractionating column, which is placed between the flask holding the mixture and the "Y" adaptor, improves the separation of the liquids being distilled.
<h3>Uses of fractional distillation :</h3>
Alcohol purification, desalination, crude oil refinement, and the creation of liquefied gases from air are all applications of distillation.
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