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antiseptic1488 [7]
3 years ago
10

A heated iron is pressed against a shirt, warming it. This is an

Physics
1 answer:
Nady [450]3 years ago
6 0

Answer:

Convection? I'm pretty sure that's it

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An object moves from point A to B to C to D and finally to A
Nataly [62]

here's the solution,

The <em>radius</em> of the circle =<u> 3 km</u>

distance covered = <em>circumference</em> of the circle,

So, Circumference :

=》

2\pi r

=》

2 \times 3.14 \times 3

=》

18.84

(a). Distance covered by moving object is 18.84 km

(b). 0 km

now, Displacement of the object is 0 km, because displacement is the shortest distance from stating point to the destination, but the object returns back to the starting point, hence magnitude of displacement is 0.

5 0
3 years ago
What is the economical application of change of state of matter
kogti [31]

Answer:

Changes of state are physical changes in matter. They are reversible changes that do not change matter's chemical makeup or chemical properties. For example, when fog changes to water vapor, it is still water and can change back to liquid water again.

4 0
3 years ago
A surfer on top of a wave takes 10 seconds to travel a distance of 40 meters. What is the speed of the wave the surfer is riding
daser333 [38]

Answer:

<h3> B. 4 m/s</h3>

Explanation:

The formula for Speed is distance per time.

<h3>Therefore Speed = Distance / Time</h3>

<u>Data</u>

D = 40 m

T = 10 sec

S = ?

<h3> Speed = 40m /10sec</h3>

To find the speed , divide the distance by the time.

Note : the unit for Speed is meter /second

<h3> Speed = 4 m/s</h3>

Therefore the speed of the wave, the surfer is riding on is 4 m/s.

7 0
1 year ago
A wooden block of dimensions of 6 cm ⨯ 6 cm ⨯ 15 cm floats with the long axis oriented horizontally and the of the square faces
schepotkina [342]

Explanation:

(a)  Formula to calculate volume of the submerged wooden block is as follows.

            V_{sub} = l \times w \times d

It is given data of the wooden block is as follows.

          depth = 7.96 cm,       length (l) = 6 cm

         width (w) = 4 cm,      

So, we will calculate the volume of the submerged wooden block as follows.

           V_{sub} = l \times w \times d

                       = 6 \times 6 \times 7.96

                       = 286.56  cm^{3}

Hence,  the submerged volume of the block is 286.56  cm^{3}.

(b)   Expression for the buoyant force acting on the wooden block is as follows.

            F_{B} = \rho_{w} g V_{sub}

And, expression for the force of gravity of the wooden block is as follows.

            F_{g} = m_{b}g

As the wooden block is floating on the water hence, buoyant force is balanced by the weight of the block.

                 F_{g} = F_{B}

Hence, mass of the wooden block will be calculated as follows.

         F_{g} = F_{B}

       m_{b}g = \rho_{w}gV_{sub}

          m_{b} = \rho_{w}V_{sub}

                      = 997 kg/m^{3} \times 286.56 cm^{3}

                      = 997 kg/m^{3} \times 286.56 \times 10^{-6} m^{3}

                      = 0.02857 kg

Therefore, mass of the given block is 0.02857 kg

(c)   Expression for the density of the block is as follows.

             \rho_{b} = \frac{m_{b}}{V_{b}}

Now, expression for the total volume of the wooden block is as follows.

             V_{b} = l \times w \times h

Hence, density of the given block is as follows.

              \rho_{b} = \frac{m_{b}}{V_{b}}

                         = \frac{m_{b}}{lwh}

                         = \frac{0.02857 kg}{4 \times 4 \times 15}

                         = 1.19 \times 10^{-4} kg/cm^{3}

Therefore, density of the given block is 1.19 \times 10^{-4} kg/cm^{3}.

3 0
3 years ago
Measure the distance from the drop point in Brazil to the drop point in Angola. Use that number in your calculation. Given that
klemol [59]

To develop this point we will start by finding the approximate coordinates of the points that were connected at the time of the Pangaea between Brazil and Angola. These coordinates are presented below.

1 . Brazil - Latitude: 18 0 07’ 55.56” S Longitude: 39 0 35’ 14.50” W 2.

Angola - Latitude: 9 0 08’ 50.02” S Longitude: 13 0 02’ 32.11” E

Using a tool for calculating distances between these two points we will notice that its distance is 576,155,570.12 cm

Applying the equation given in the statement we will have to,

v = \frac{x}{t} \rightarrow v = Velocity, x = Distance, t = Time

200,000,000 years have passed and the movement was previously found, so the speed of travel is,

v = \frac{576,155,570.12cm}{200.000.000 years}

v = 2.88 cm/year

Therefore the velocity is 2.88 cm per year.

6 0
3 years ago
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