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maw [93]
3 years ago
15

Which one of the following is an example of an indicator?

Physics
1 answer:
pshichka [43]3 years ago
5 0
C: Litmus Paper. Red litmus paper turns blue in acids; blue litmus paper turns red in bases
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On your first trip to Planet X you happen to take along a 290 g mass, a 40-cm-long spring, a meter stick, and a stopwatch. You'r
Fynjy0 [20]

Answer:

The new value of g = 1.19 m/s^2

Explanation:

Mass  =290 g

Spring size  = 40 cm

The size of spring after streches = 23 cm

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The stopwatch shows the number of oscillations in 17.7 s = 9 osscillations.

The oscillation frequency is independent to g.

So, w = \sqrt{\frac{k}{m}} \\T = \frac{17.7}{9} = 1.966 \\W = \frac{2\pi}{T} = 3.197 \\w = \sqrt{\frac{k}{m}} \\k = w^{2}m \\k = (3.197)^{2} \times 0.29 = 2.96 N/M \\

The amount of spring stretch due to the hanging mass, x, is dependent on g.

Now, \ mg = kx \\g = \frac{kx}{m} \\g = \frac{2.96 \times 0.117}{0.29} = 1.19 m/s^{2}

Therefore, the new value of g = 1.19 m/s^2

6 0
3 years ago
A 25kg object moves from left to right at a speed of 30km/h. What net force is required to keep this object moving in a straight
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