Answer:
b. depends upon the medium in which it occurs
Explanation:
When source of sound and observer moves relative to each other then in that case the relative motion between them will change the frequency that is observed by the observer.
It is known as Doppler's effect. In that case the velocity of wave depends on the medium in which wave travels.
As we know that wave speed is given as
so here as the medium of the wave changes the speed of wave also be different so here correct answer will be
b. depends upon the medium in which it occurs
The acceleration due to gravity of the planet X is 1 m/s².
The given parameters;
The acceleration due to gravity is calculated as follows;
Thus, the acceleration due to gravity of the planet X is 1 m/s²
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Answer:
v = 134.06 m/s
Explanation:
Given that,
Radius of a circular track is 1,835 m
Time required to complete one lap around a perfectly circular track is 86 seconds
We need to find the car's velocity. Velocity is equal to,
v=d/t
On circular path,
So, car's velocity is 134.06 m/s.
Answer: a)
b)
Explanation:
A nuclear fission reaction is defined as the reaction in which a heavy nucleus splits into small nuclei along with release of energy.
a) The given reaction is
Now, as the mass on both reactant and product side must be equal:
Thus three neutrons are produced and nuclear equation will be:
b) For the another fission reaction:
To calculate A:
Total mass on reactant side = total mass on product side
235 + 1 = A + 94 + 2
A = 140
To calculate Z:
Total atomic number on reactant side = total atomic number on product side
92 + 0 = 56 + Z + 0
Z = 36
As Krypton has atomic number of 36,Thus the nuclear equation will be :