3 years ago

What is one way to increase the amplitude of a wave in a medium?

Physics

2 answers:

-BARSIC- [3]3 years ago

8 0

the answer is A for plato users

Viefleur [7K]3 years ago

7 0

By adding a vibration at the natural frequency of the medium-A

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78 grams of a radioactive nuclei X undergoes radioactive decay. The half-life of X is 4.7 minutes. After 16.5 minutes, the remai

kipiarov [429]

Answer: The remaining sample of X is 6.9 grams.

Explanation:

All the radioactive reactions follow first order kinetics.

The equation used to calculate rate constant from given half life for first order kinetics:

$t_{1/2}=\frac{0.693}{k}$

We are given:

$t_{1/2}=4.7min$

Putting values in above equation, we get:

$k=\frac{0.693}{4.7min}=0.147min^{-1}$

The equation used to calculate time period follows:

$N=N_o\times e^{-k\times t}$

where,

$N_o$ = initial mass of sample X = 78 g

N = remaining mass of sample X = ? g

t = time = 16.5 min

k = rate constant = $0.147min^{-1}$

Putting values in above equation, we get:

$N=78\times e^{-(0.147min^{-1}\times 16.5min)}\\\\N=6.9g$

Hence, the remaining amount of sample X is 6.9 g

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4 years ago

The higher the amplitude of the wave, the greater its intensity and the greater its loudness.

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Very True om 1000 percent sure.

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A car speeds up from 18.54 m/s to 29.52 m/s in 13.84 s. The acceleration of the car is:

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Answer:

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Explanation:

Acceleration = change in velocity / change in time

A = 10.98 $m/s$ / 13.84 $s$

A = .7934 $m/s^{2}$

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