Answer:
The tension in the string is 78.73 N.
Explanation:
The tension in the string can be determined from the expression;
v =
where: v is the speed of the wave in the sting, T is the tension in the string and m is the mass per unit length of the sting.
Given that: v = 16.2 m/s, and m = 0.3 kg/m.
Then;
16.2 =
Square both sides to have,
=
T = x 0.3
= 252.44 x 0.3
= 78.732
T = 78.732 N
The tension in the string is 78.73 N.
Answer:
-3.1 m/s²
Explanation:
Given data
- Initial speed (v₀): 20 m/s
- Final speed (vf): 0 m/s (the automobile stops)
- Elapsed time (t): 6.5 seconds
- Acceleration (a): to be determined
We can determine the acceleration of the automobile using the following kinematic expression.
a = Δv / t
a = vf - v₀ / t
a = (0 m/s - 20 m/s) / 6.5 s
a = -3.1 m/s²
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the answer is D. because a topographic map measures the lowest and highest points in a certain place
Hope this helps