Yes they transfer waves in order to get energy of mechanical
1st-B
2nd-A
3rd-C variation in frequency
Answer:
72.53 mi/hr
Explanation:
From the question given above, the following data were obtained:
Vertical distance i.e Height (h) = 8.26 m
Horizontal distance (s) = 42.1 m
Horizontal velocity (u) =?
Next, we shall determine the time taken for the car to get to the ground.
This can be obtained as follow:
Height (h) = 8.26 m
Acceleration due to gravity (g) = 9.8 m/s²
Time (t) =?
h = ½gt²
8.26 = ½ × 9.8 × t²
8.26 = 4.9 × t²
Divide both side by 4.9
t² = 8.26 / 4.9
Take the square root of both side by
t = √(8.26 / 4.9)
t = 1.3 s
Next, we shall determine the horizontal velocity of the car. This can be obtained as follow:
Horizontal distance (s) = 42.1 m
Time (t) = 1.3 s
Horizontal velocity (u) =?
s = ut
42.1 = u × 1.3
Divide both side by 1.3
u = 42.1 / 1.3
u = 32.38 m/s
Finally, we shall convert 32.38 m/s to miles per hour (mi/hr). This can be obtained as follow:
1 m/s = 2.24 mi/hr
Therefore,
32.38 m/s = 32.38 m/s × 2.24 mi/hr / 1 m/s
32.38 m/s = 72.53 mi/hr
Thus, the car was moving at a speed of
72.53 mi/hr.
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Answer:
mass of other block is 0.7142 kg
Explanation:
given data
mass = 5.0 kg
accelerates downward =
to find out
mass of other block
solution
we will apply here Newton 2nd law that is
force ∑Fy = mass × acceleration
so
t - mg = ma .............1
t = 5 ( 9.8 + )
t = 12.25 N
so other block mass is from equation 1
t - mg = ma
t = m ( g+a)
12.25 = m ( g + )
12.25 = m ( 9.8
m = 0.7142 kg
mass of other block is 0.7142 kg