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3 years ago

Does the air pressure change more quickly at higher altitudes or at lower altitudes

1 answer:

3 0

Pressure decreases with increasing altitude. At higher elevations, there are fewer air molecules above a given surface than a similar surface at lower levels.

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If the volume of a substance is measured with a graduated cylinder, the unit of measure for volume will be:

nirvana33 [79]

Answer:Today they will practice measuring different liquids. They will use a container called a graduated cylinder to measure liquids. Graduated cylinders have numbers on the side that help you determine the volume. Volume is measured in units called liters or fractions of liters called milliliters (ml).

Explanation:

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3 years ago

Can you please tell me the steps to figure how the answers to number 2?

Evgesh-ka [11]

Answer:

its a trick yo have to add it all

Explanation:

7 0

3 years ago

An infrared wave traveling through a vacuum has a frequency of 4.0 × 1014 Hz. What is the wave’s wavelength?

mote1985 [20]

Answer: The wavelength of the wave travelling through vaccum is $7.5\times 10^{-7}m$

Explanation:

To calculate the wavelength of the wave, we use the formula:

$\nu=\frac{c}{\lambda}$

Rearranging the terms,

$\lambda=\frac{c}{\nu}$

Where, $\lambda$ = wavelength of the wave = ?

$\nu$ = Frequency of the wave = $4.0\times 10^{14}s^{-1}$

c = Speed of light in vacuum = $3.0\times 10^8m/s$

Putting values in above equation, we get:

$\lambda=\frac{3.0\times 10^8m/s}{4.0\times 10^{14}s^{-1}}\\\\\lambda=0.75\times 10^{-6}m=7.5\times 10^{-7}m$

Hence, wavelength of the wave in vacuum will be $7.5\times 10^{-7}m$

8 0

4 years ago

Read 2 more answers

Two separate pure samples of carbon dioxide were analyzed. Both samples were found to contain 27.29% carbon by mass. Justify the

Wittaler [7]

Answer:

Atoms of the same element are exactly alike in all respects and are different from atoms of other elements.

Explanation:

One of the postulates of the Dalton's atomic theory is that 'Atoms of the same element are exactly alike in all respects and are different from atoms of other elements.'

Hence, if carbon dioxide from two sources are obtained and analysed, the mass percentage of carbon in both samples should be exactly the same since they both contain atoms of carbon. The atoms of carbon in the both samples are exactly the same in all respects in accordance with the Dalton's atomic theory, hence the observation.

3 0

3 years ago

How can volcanoes impact people?

inn [45]

Explanation:

1/ Fast-moving lava can kill citizens nearby the active volcanoes. (They can also die from famine, fires and earthquakes which can caused by volcanoes)

2/ Volcanic ash can cause breathing problems and damage the lungs.

3/ They can lose their possessions as volcanoes can destroy their houses, roads and fields.

4/ Volcanoes can change the weather. They can cause rain, thunder and lightning which can cause damage to people.

5/ When volcanoes erupt, they emit a mixture of gases and particles into the air which can cause global warming by adding to the greenhouse effect (such as CO2) or a significant dip in global temperatures in the following year or two (ash and Sulfur dioxide).

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6 0

3 years ago