A wire that is cold has less resistance than a wire that is hot<br> True<br> False

Eric is creating a timeline of the formation of the solar system. Which sequence best describes the formation of the solar syste

vlada-n [284]

The answer is C. nebular are star nurseries. When the massive gas being collapsing in its own weight. Local areas of gas begin to coalesce under gravity. Due to enormous pressure, nuclear fusion begins and a protostar is formed. The protostar grows into the sun as more hydrogen fuses at the core. The planetesimal materials at the edges of the protostellar discs coalesce to form planets that orbit the star.

3 0

3 years ago

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. A horizontal steel spring has a spring constant of 40.0 N/m. What force must be applied to the spring in order to compress it

ANEK [815]

Ans 4 more to be exact

Explanation:

7 0

3 years ago

A beach ball with a volume of 5,000 cm3 is pushed underwater. What is the magnitude of the buoyant force pushing upwards? The de

Kobotan [32]

<h2>Hello!</h2>

The answer is:

The buoyant force is equal to 49N.

The buoyant force is the force that pushes upwards and object when it's submerged in water, this force is always trying to move the object to the surface of the liquid or water. We must consider that the volume of water or liquid displaced is equal to the volume of the submerged object.

We can calculate the buoyant force using the following formula:

$F_{B}=Density*VolumeDisplaced*GravityAcceleration$

Where,

Density is the density of the water or liquid.

Volume displaced is equal to the volume of the submerged object.

Gravity acceleration is the acceleration due to gravity.

So, from the statement we know that:

$VolumeDisplaced=BeachBallVolume=5000cm^{3}\\\\Density=1\frac{gram}{cm^{3} }=\frac{0.001kg}{cm^{3} }\\\\g=9.8\frac{m}{s^{2} }$

Now, substituting and calculating we have:

$F_{B}=Density*VolumeDisplaced*GravityAcceleration$

$F_{B}=0.001\frac{kg}{cm^{3}*} *5000cm^{3}*9.8\frac{m}{s^{2} }$

$F_{B}=49\frac{Kg.m}{s^{2}}=49N$

Hence, we have that the correct answer is:

The buoyant force is equal to 49N.

Have a nice day!

7 0

4 years ago

An astronaut circles the earth in a satellite at an altitude of 150 km. If the diameter of his pupils is 2.0 mm and the average

Fiesta28 [93]

Answer:

d = 49.5 m

hence we can say it is conceivable that he can distinguish sports stadiums on earth's surface but in Private houses? Cars? it can not becayuse they are are very small

Explanation:

Given data

altitude = 150 km

diameter = 2.0 mm

wavelength = 550 nm

to find out

is it conceivable that he can distinguish sports stadiums

solution

we will apply here formula that is

∅ = 1.2 λ / D

put here λ = 550 × $10^{-9}$ m and D = 2 × $10^{-3}$ m

∅ = (1.2 ) 550 × $10^{-9}$ / 2 × $10^{-3}$

∅ = 3.30 × $10^{-4}$ rad

so

d = 150 × $10^{3}$ × 3.30 × $10^{-4}$

d = 49.5 m

hence we can say it is conceivable that he can distinguish sports stadiums on earth's surface but in Private houses? Cars? it can not becayuse they are are very small

5 0

3 years ago

Im board lolololololololololol

inysia [295]

Answer:

same bru

Explanation:

5 0

3 years ago

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A wire that is cold has less resistance than a wire that is hot True False