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3 years ago

Do all of them please and explain

Physics

2 answers:

kondaur [170]3 years ago

5 0

At 305 and 309 it was negative because it is going down

at 300 and 301 and 305 it was positive because its going up

at 302/303/304/306/309 she wasn't accelerating at all because it is staying the same

k0ka [10]3 years ago

5 0

Okay, so for 11: She is negatively accelerating between 3:05 and 3:06 and between 3:08 and 3:09

When you have a speed vs distance graph, the slope of the graph represents the acceleration, since there is a negative slope there we can say she was negatively accelerating

12. So now all we have to do it look for a line going up or a positive slope:

So: 3:00 to 3:02 , 3:07 to 3:08

13. So, when we are looking for no acceleration we are looking for a straight line, or a line with no slope at all which is between the intervals of:

3:02 to 3:05 , 3:06 to 3:07 and 3:09 to 3:10

Hope this helped, let me know if any of it doesnt make sense.

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At what temperature will water begin to boil and turn to steam?

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Answer:

100 degrees Celsius

Explanation:

Water starts to boil at 100 degrees celcius or 212 degrees fahrenheit.

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3 years ago

Read 2 more answers

When hiking at altitude, the air pressure drops to 825,000Pa. Solve the force that site exerts against the side of a rectangular

OLga [1]

Answer:

The force is $1237500N$

Explanation:

We can apply the following expression

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To find the area of rectangular tent wall:

$Area=length *width\\Area=2.00m*0.750m\\Area=1.5m^{2}$

Now to find the force:

$pressure=825,000pa$

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2 years ago

6 Fig. 6.1 is a full-scale diagram that represents a sound wave travelling in air

Oxana [17]

From the measured wavelength from diagram, the frequency of the sound is 6660 Hz.

<h3>What is the frequency of a wave?</h3>

The frequency of a wave is the number of complete oscillation per second completed by a wave.

Frequency is related to wavelength and speed by the following formula:

Frequency = velocity/wavelength

Velocity of sound in air = 330 m/s

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1 year ago

12. An organ pipe that is 1.75 m long and open at both ends produces sound of

podryga [215]

Answer:

354 m/s

Explanation:

For the second overtune (Third harmonic) of an open pipe,

λ = 2L/3................................ Equation 1

Where L = Length of the open pipe, λ = Wave length.

Given: L = 1.75 m.

Substitute into equation 1

λ = 2(1.75)/3

λ = 1.17 m.

From the question,

V = λf.......................... Equation 2

V = speed of sound in the room, f = frequency

Given: f = 303 Hz.

Substitute into equation 2

V = 1.17(303)

V = 353.5

V ≈ 354 m/s

Hence the right answer is 354 m/s

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2 years ago

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drek231 [11]

<u>Answer:</u>

In addition to average weather conditions, climatological data also describes annual variations and fluctuations of temperature, precipitation, wind speed and other variables.

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A lot many observations are made all around the world regarding the weather each day. These observations and analysis are done by humans as well as automated instruments. The weather data is collected each day all year and any inaccuracies and discrepancies are checked and rectified. The results are later then presented as the climate data. There are various factors that are taken into consideration while determining the climate of a region. Apart from the factors that are already mentioned, wind speed is also one of the other variables.

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2 years ago