3 years ago

Which of the following is an example of mechanical waves in nature?

1 answer:

8 0

The correct answer is D. sound

A mechanical wave is one where oscillations of matter occur and energy is transferred through a medium, which is what occurs with sound waves.

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A car accelerates from 10.0 m/s to 30.0 m/s at a rate of 3.00 m/s2. how far does the car travel while accelerating?

Snezhnost [94]

Answer is in attachment.

3 0

3 years ago

A 2018 Tesla Model S has a horsepower of 518. How many watts of power does this car model have?

elena-14-01-66 [18.8K]

Answer:

It depends on the model but these are the watts of each motor

Explanation:

Un motor: 258 HP (262 CV) Dual motor: 154 kW (209 CV) y 197 kW (268 CV). Performance: 154 kW (209 CV) y 225 kW (306 CV).

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3 years ago

If this decay has half-life of 2 years, how many years would it take for 10.8 g Protactinium-231 to remain given an initial mass

sergij07 [2.7K]

Answer:

Time = 6 years

Explanation:

First, we will calculate the no. of half life periods required to reduce the mass of Protactinium to the given value:

$m' = \frac{m}{2^{n} } \\\\2^n = \frac{m}{m'}$

where,

n = no. of half-life periods = ?

m = initial mass = 86.3 g

m' = remaining mass = 10.8 g

Therefore,

$2^n = \frac{86.3\ g}{10.8\ g}\\\\2^n = 8\\2^n = 2^3$

Since the bases are the same. Therefore equating powers:

n = 3

Now we calculate the time:

$Time = (n)(Half-Life)\\Time =(3)(2\ years)$

<u>Time = 6 years</u>

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3 years ago

Help with this physics question please :)

irina [24]

Answer:

is that rm in you profile pic

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3 years ago

________ is the si unit of angular momentum

navik [9.2K]

Answer:

kg m2/s

Explanation:

I think it is :)

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3 years ago