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4 years ago

6

the fabric of the hot air balloon can stretch, but it does not allow air to pass through it. think about the change in air densi

ty you expect as the pilot adds hear to the air in the balloon. what change would you expect to see in the fabric of the hot air balloon. explain

1 answer:

Karolina [17]4 years ago

3 0

It would definitely stretch and wouldn't do anything as long as there is no holes in it.

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A colorless liquid is located in a graduated cylinder that measures 35 mL. If the graduated cylinder has a mass o

Alchen [17]

Density of liquid is 1 g/mL.

<h3>What is density of a substance?</h3>

Density is the ratio of the mass and the volume of a substance

Mathematically density of a substance is given as follows:

Density = mass/volume

The density of the substance is:

mass of liquid = 172 - 137 = 35 g

volume of liquid = 35 mL

Density of liquid = 35 g/35 mL

Density of liquid = 1 g/mL

In conclusion, density is obtained as a ratio of mass and volume.

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2 years ago

Which was an idea use to distribute the theory of plate tectonics

xxMikexx [17]

Answer:

continental drift

Explanation:

Wegener proposed that the continents plowed through crust of ocean basins, which would explain why the outlines of many coastlines look like they fit together like a puzzle

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4 years ago

A circular loop of wire 75 mm in radius carries a current of 113 A. Find the (a) magnetic field strength and (b) energy density

Roman55 [17]

The magnetic field strength is 9.47 ×10⁻⁴ T

The energy density at the center of the loop is 0.36 J/m³

<h3>Calculating Magnetic field strength & Energy density </h3>

From the question, we are to find the magnetic field strength

The magnetic field strength of a loop can be calculated by using the formula,

$B = \frac{\mu_{0} I}{2R}$

Where B is the magnetic field strength

$\mu_{0}$ is the permeability of free space $(\mu_{0}=4\pi \times 10^{-7} \ N/A^{2})$

$I$ is the current

and R is the radius

From the give information,

$R = 75 \ mm= 75 \times 10^{-3} \ m$

and $I = 113 \ A$

Putting the parameters into the formula, we get

$B = \frac{4\pi \times 10^{-7} \times 113}{2 \times 75 \times 10^{-3} }$

$B = 9.47 \times 10^{-4} \ T$

Hence, the magnetic field strength is 9.47 ×10⁻⁴ T

Now, for the energy density

Energy density can be calculated by using the formula,

$u_{B} = \frac{B^{2} }{2\mu_{0} }$

Where $u_{B}$ is the energy density

Then,

$u_{B}= \frac{(9.47\times 10^{-4} )^{2} }{2 \times 4\pi \times 10^{-7} }$

$u_{B} = 0.36 \ J/m^{3}$

Hence, the energy density at the center of the loop is 0.36 J/m³

Learn more on Magnetic field stregth & Energy density here: brainly.com/question/13035557

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2 years ago

Water flows along a streamline down a river of constant width. Over a short distance, the water slows from speed v to v/3. Which

kvasek [131]

Answer:

a. It became deeper by a factor of 3.

Explanation:

What we have is water flowing down a river with constant width. The water slows from speed v to v3 over a shirt distance

Using the equation of continuity

A1V1 = A2V2 ----1

A1 is the area of rectangle

V1 is the velocity of water

Area of rectangle = length x width

We rewrite equation 1 as

λ1w1v1 = λ2w2v2

We have w1 = w2

λ1v1 = λ2v2

λ1*v1 = λ2*v/3

λ1 = λ2/3

So it becomes deeper by a factor of 3

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3 years ago

How much weight is generated by an 80 kg person on planet earth? On the moon?

otez555 [7]

It will be 133 on the moon

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3 years ago