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makkiz [27]
3 years ago
11

How fast is a plane that traveled 400 km in 30 minutes? Give the speed in km/hr.

Physics
1 answer:
Jobisdone [24]3 years ago
7 0

Answer:

13.33 km/hr i think...

Explanation:

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A microwave works by focusing microwave light on the food inside of it. Which type of energy transformation takes place in a mic
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Electrical energy is transformed into light energy.

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The physical quantity represented as rate of change of change in position in a
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B

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Create a hypothesis for this testable question: How does price affect the amount of chocolate people buy?
Wittaler [7]

Answer:

IF the price of chocolate increases, THEN the amount of chocolate people buy decreases

Explanation:

In a scientific investigation, an observation is first made. Based on this observation, a scientific question is then asked. However, a HYPOTHESIS is given next to explain the question asked. A hyothesis is a testable explanation given to solve an observed problem or provide a possible answer to a question.

The hypothesis must be subject to testing via EXPERIMENTATION. A hypothesis usually goes in an IF, THEN format. In this case with the testable question: How does price affect the amount of chocolate people buy?

A hypothesis that can explain this question is: IF the price of chocolate increases, THEN the amount of chocolate people buy decreases.

5 0
3 years ago
At a country music festival, a band is playing at the end of a crowded
Dominik [7]

Answer:

2270 full wavelengths.

Explanation:

The wavelength \lambda of the sound wave (assuming sound speed of  v= 343m/s) is

\lambda = \dfrac{v}{f} = \dfrac{343m/s}{400hz}

\lambda = 0.8575m.

Now, assuming the distance to the last row is 1947m, the number n of wavelengths that fit into this distance are

n = \dfrac{1947m}{0.8575m}

n= 2270.55

which is 2270 full wavelengths.

Hence, there are 2270 full wavelengths between the stage and the last row of the crowd.

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3 years ago
Use the SI prefixes in Table 3 of this chapter to convert these hypothetical units of measure into appropriate quantities: a. 10
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4 years ago
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