Answer:
The value is
Explanation:
From the question we are that
The velocity
The time taken is
The total mass of the train is
Generally the average power delivered is mathematically represented as
=>
=>
Answer:
Option (A).
Explanation:
When a hot and a cold objects come in thermal contact with each other,exchange of heat takes place between them until thermal equilibrium is reached.
In this process thermal energy flows from high temperature to low.
Therefore, when a beaker of boiling water comes in touch with a block of ice,
Thermal energy starts flowing from boiling water to block of ice until equilibrium is established.
Option (A) will be the answer.
Answer:
.
Explanation:
The frequency of a wave is equal to the number of wave cycles that go through a point on its path in unit time (where "unit time" is typically equal to one second.)
The wave in this question travels at a speed of . In other words, the wave would have traveled in each second. Consider a point on the path of this wave. If a peak was initially at that point, in one second that peak would be
How many wave cycles can fit into that ? The wavelength of this wave gives the length of one wave cycle. Therefore:
.
That is: there are wave cycles in of this wave.
On the other hand, Because that of this wave goes through that point in each second, that wave cycles will go through that point in the same amount of time. Hence, the frequency of this wave would be
Because one wave cycle per second is equivalent to one Hertz, the frequency of this wave can be written as:
.
The calculations above can be expressed with the formula:
,
where
- represents the speed of this wave, and
- represents the wavelength of this wave.
Answer:
P=1587.18 Pa
Explanation:
Given that
V= 1.77 L =1.77 x 10⁻³ m³
m = 0.226 g
Vrms= 178 m/s
We know that ideal gas equation
P V = n R T
M=Molecular wight of the gas
P M = m R T -----------1
P=Pressure ,V=Volume ,n=Moles,R=Gas constant ,T=temperature
------2
From above two equation we can say that
P=1587.18 Pa
The pressure of the gas is 1587.18 Pa