Answer:
21 Hz, 43 Hz and 22 Hz
Explanation:
The computation of the beat frequencies that are generated by this discordant combination is as follows:
As we know that
beat frequencies = |f_1 - f_2|
So
For the first one
= |349 Hz - 370 Hz|
= 21 Hz
For the second one
= |349 Hz - 392 Hz|
= 43 Hz
And, for the third one
= |370 Hz - 392 Hz|
= 22 Hz
Answer:
Time period, T = 1.98 seconds
Explanation:
It is given that,
Mass of the block, m = 300 g = 0.3 kg
Force constant of the spring, k = 3 N/m
Displacement in the block, x = 3 cm
Let T is the period of the motion of the block. The time period of the block is given by :

T = 1.98 seconds
So, the period of the motion of the block is 1.98 seconds. Hence, this is the required solution.
Answer:
Option D: 4 mm⁴
Explanation:
Formula for area moment of inertia for a circular cross-section is;
I = πd⁴/64
We are given diameter;
d = 3 mm
Thus;
I = π × 3⁴/64
I = 3.98 mm⁴
Approximating to a whole number gives;
I = 4 mm⁴
Acceleration vs time graph would show C. A horizontal line (at zero)
Explanation:
The acceleration of an object is the rate of change of velocity of the object:

where
is the change in velocity
is the time interval
For an object moving at constant velocity,

This means that also the acceleration is zero:

And therefore, if we plot the graph of the acceleration vs time, we would see a horizontal line (cosntant acceleration) at zero (because the acceleration is zero).
Learn more about acceleration:
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Gravitational Potential energy is given as

here we know that
m = 16.6 kg
h = 1.3 m
now we will have

now we have

so the potential energy will be 211.5 J with respect to ground