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3 years ago

What process is occurring during section "B" of the graph?

Physics

2 answers:

Ghella [55]3 years ago

8 0

Here, substance is absorbing heat but it's temperature is remaining steady at 0 degrees C (Section B). So we know that the substance is changing state. It is melting (solid to liquid).

In short, Your Answer would be Option A

Hope this helps!

trasher [3.6K]3 years ago

7 0

According to the graph the substance is absorbing heat but it's temperature is remaining steady at 100 degrees C. So we know that the substance is changing state. It is evaporating. And most likely the substance is water.

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Light from a laser forms a 1.31-mm diameter spot on a wall. If the light intensity in the spot is what is the power output of th

Wewaii [24]

Answer:

0.04973 W

Explanation:

I = Intensity of laser = $3.69\times 10^4\ W/m^2$ (assumed, as it is not given)

d = Diameter of spot = 1.31 mm

r = Radius = $\dfrac{d}{2}=\dfrac{1.31}{2}\ mm$

A = Area = $\pi r^2$

Power is given by

$P=IA\\\Rightarrow P=3.69\times 10^4\times \pi \dfrac{(1.31\times 10^{-3})^2}{4}\\\Rightarrow P=0.04973\ W$

The power output of the laser is 0.04973 W

5 0

3 years ago

which best describes what happens with the sonar to sound pulses from a ship after they hit the ocean floor?

lakkis [162]

Answer:

With sonar, what happens to sound pulses from a ship after they hit the ocean floor? ... They bounce back to the ship.

Explanation:

3 0

3 years ago

Consider two less-than-desirable options. In the first you are driving 30 mph and crash head-on into an identical car also going

4vir4ik [10]

Answer:

B. The force would be the same in both cases.

Explanation:

According to Newton's 3rd law where impulse was equated to the momentum formula.

F × t = M × V

where,

Force = F

V = velocity

Since, Impulse is force multiplied by time, whereas the time of contact is the same for both, therefore the impulse is the same in magnitude for the two trucks.

Case 1: Hitting the other car

Case 2: Hitting the brick wall

In Case 1, both the cars are identical and have same velocity whereas in the Case 2, the wall is stationary.

The case of hitting the brick wall have the same impact force as hitting the other car, because they have the same change in momentum.

Therefore, The force would be the same in both cases.

6 0

4 years ago

Kabir covers by car a distance 25 km through 4 minutes and then he covers 40km through 12 minutes. Calculate his average speed.

algol13

Answer:

4.1 km/m

Explanation:

The average speed=Total distance/total time

Total distance=25+40=65

Total time=4+12=16

the average speed is 65/76=4.1 km/m

3 0

3 years ago

Scientists earlier believed that the lowest measurable temperature is the freezing point of ice. However, modern scientists beli

djverab [1.8K]

I think the correct answer from the choices listed above is the first option. The statement that best accounts for these different opinions would be that <span>scientists propose contradictory ideas to include all possibilities. Hope this answers the question. Have a nice day.</span>

5 0

3 years ago

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