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PtichkaEL [24]
3 years ago
7

How is a fireplace an example of both convection and radiation?

Physics
1 answer:
slega [8]3 years ago
5 0
A fire spreads by transferring heat in 3 ways, Raditation, convection, and Conduction :)
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What cultular value does this melodic line portray?<br>a.jubilant<br>b.reserved<br>c.rich<br>d.poor​
SOVA2 [1]

<em>What cultular value does this melodic line portray?</em>

<em>answer</em><em> </em><em>:</em><em> </em><em>reserved</em><em>.</em><em>.</em><em>.</em>

6 0
3 years ago
A skateboarder shoots off a ramp with a velocity of 7.3 m/s, directed at an angle of 60° above the horizontal. The end of the ra
erica [24]

Answer:

y maximum   3.54 m, value X  2.35 m

Explanation:

We have a projectile launch problem, let's calculate the maximum height of the projectile, where the vertical speed must be zero

                     

        Vyf² = Vyo² - 2g (Y-Yo)

Where Yo is the initial height of the ramp 1.5 m

        0 = Vyo² -2g (Y-Yo)

        Y-Yo = Voy² / 2g

       Y = Yo + Voy² / 2g

Let's calculate the velocity components using trigonometry

       Voy = vo without T

       Vox = Vo cost

       Voy = 7.3 sin 60

       Vox = 7.3 cos 60

       Voy = 6.32 m / s

       Vox = 3.65 m / s

Let's calculate the maximum height

         Y = 1.5 +6.32²/2 9.8

          Y = 3.54 m

This is the maximum height from the ground

b) They ask us for the position of this point horizontally, we can calculate it looking for the time it took for the skateboarder to reach the highest point

                             

          Vfy = Voy - gt

          0 = Voy - gt

           t = Voy / g

           t = 6.32 / 9.8

           t = 0.645 s

     

Since there is no acceleration on the x-axis, we have a uniform movement, we can calculate the distance for this time

          X = Vox t

          X = 3.65 0.645

          X= 2.35 m

8 0
3 years ago
Anybody know the answer to this ?
Firlakuza [10]

Answer:

4 ampere

Explanation:

I= v/R

=12/3

= 4 amp

5 0
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Which groups on the periodic table contain metalloids?
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Metalloids are in Group 13 to 16
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If i try to fail and succeed which one did I do
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You've failed because you failing becomes a statement rather than it becoming fact or what actually happened. 
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