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4 years ago

Which statement accurately describes what happens when water turns to ice in terms of energy

Physics

1 answer:

Deffense [45]4 years ago

7 0

Answer:

The water releases energy which causes the water molecules to have less kinetic and potential energy, changing their configuration from liquid to solid.

Explanation:

Confirmed through test.

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helicopter flies an average velocity of 70 m/s2 for 10.0 seconds. What ios ther magnitude of the helicopter's displacement? answ

Inessa [10]

The uniform movement allows finding the results for the helicopter displacement during the 10 s is: 700 m

Kinematics studies the motion of bodies, finding relationships between the position, velocity and acceleration of the body, in the special case that the acceleration is zero, it is called uniform motion and is described by the equation

$v = \frac{\Delta s}{t}$

Where v is the average velocity, Ds is the displacement and t is the time

Δs = v t

They indicate that the average speed is 70 m / s and the travel time is t=10.0s

Let's calculate

Δs = 70 10.0

Δs = 700 m / s

In conclusion using the uniform movement we can find the results for the helicopter displacement is: 700 m

Learn more here: brainly.com/question/14355103

7 0

3 years ago

Read 2 more answers

jet is flying at 500 mph east relative to the ground. A Cessna is flying at 150 mph 60° north of west relative to the ground. Wh

Greeley [361]

Answer:

C. 590 mph

$\vert v_{cj}\vert=589.49\ mph$

Explanation:

Given:

velocity of jet, $v_j=500\ mph$
direction of velocity of jet, east relative to the ground
velocity of Cessna, $v_c=150\ mph$
direction of velocity of Cessna, 60° north of west

Taking the x-axis alignment towards east and hence we have the velocity vector of the jet as reference.

Refer the attached schematic.

So,

$\vec v_j=500\ \hat i\ mph$

$\vec v_c=150\times (\cos120\ \hat i+\sin120\ \hat j)$

$\vec v_c=-75\ \hat i+75\sqrt{3}\ \hat j\ mph$

Now the vector of relative velocity of Cessna with respect to jet:

$\vec v_{cj}=\vec v_j-\vec v_c$

$\vec v_{cj}=500\ \hat i-(-75\ \hat i+75\sqrt{3}\ \hat j )$

$\vec v_{cj}=575\ \hat i-75\sqrt{3}\ \hat j\ mph$

Now the magnitude of this velocity:

$\vert v_{cj}\vert=\sqrt{(575)^2+(75\sqrt{3} )^2}$

$\vert v_{cj}\vert=589.49\ mph$ is the relative velocity of Cessna with respect to the jet.

8 0

3 years ago

German philosopher and physicist Gustav Theodor Fechner founded psychophysics.

Sati [7]

It is true that Gustav Theodor Fechner was the finder of <span>psychophysics. </span>

6 0

3 years ago

Read 2 more answers

Astronaut mark uri is space-traveling from planet x to planet y at a speed of relative to the planets, which are at rest relativ

lyudmila [28]

<span>From the point of view of the astronaut, he travels between planets with a speed of 0.6c. His distance between the planets is less than the other bodies around him and so by applying Lorentz factor, we have 2*</span>√1-0.6² = 1.6 light hours. On the other hand, from the point of view of the other bodies, time for them is slower. For the bodies, they have to wait for about 1/0.6 = 1.67 light hours while for him it is 1/(0.8) = 1.25 light hours. The remaining distance for the astronaut would be 1.67 - 1.25 = 0.42 light hours. And then, light travels in all frames and so the astronaut will see that the flash from the second planet after 0.42 light hours and from the 1.25 light hours is, 1.25 - 0.42 = 0.83 light hours or 49.8 minutes.

5 0

3 years ago

Why is the likelihood of amajor earthquake along the san andreas fault so worrisome??

Softa [21]

Because a lot of people live along the fault line and there would be lots of death and much property damage.

5 0

3 years ago