Describe and explain how the movement and arrangement of the particles in a block of ice change as the ice melts to form liquid water. In your answer, include ideas about energy transfer.

Answers

Answer 1

Answer:

Answer:

Ice is water in solid phase, in this phase, the particles are very close together and relatively in fixed positions.

As the temperature starts to increase (thermal energy), also does the kinetic energy of the particles (so we have a change from thermal energy to kinetic energy), so they start to move "more", and the position of the particles starts to be less "fixed". There is a point where the particles have enough energy, and this point is where the phase of the water changes from solid to liquid phase (the fusion point). After this point the water can not hold his shape, and takes the shape of the container where it is.

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A golf club with 65J of kinetic energy strikes a stationary golf ball with a mass of 46g. The energy transfer is only 20% efficient. Calculate the initial speed of the golf ball
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How many elective courses does a college student typically have to take to earn a bachelors degree?

Answers

6 elective courses
i hope this helps :)

According to “The Cyclone,” who invented the Fourth of July?A. Pecos Bill
B. Alexander Hamilton
C. Sam Houston
D. George Washington

Answers

A. Pecos Bill

According to “The Cyclone,” who invented the Fourth of July is PECOS BILL
NOT:
B. Alexander Hamilton
C. Sam Houston
D. George Washington

An automobile covered the distance of 240 km between A and B with a certain speed. On its way back, the automobile covered half of the distance at the same speed and for the rest of the trip he increased his speed by 10 km/hour. As a result, the drive back took him 2 5 of an hour less than the drive from A to B. What was the automobile’s speed when it was driving from A to B?

Answers

Answer:

Therefore the speed of automobile when it was driving from A to B was 50 km/ h.

Explanation:

Given that,

An automobile covered the distance of 240 km between A and B with a certain speed.

Let the speed of the automobile be x km/hour.

We know that,

$Time =(distance)/(speed)$

Time taken to travel from A to B point is $=(240)/(x)$ hours.

On its back, the automobile covered half of distance= 120 km at the same speed and for the trip he increased his speed 10 km/hour.

Time taken to complete the trip is

$=((120)/(x)+(120)/(x+10))$ hours

The driver took $\frac25$ of an hour less when he come back.

According to problem,

$(240)/(x)-((120)/(x)+(120)/(x+10))=\frac25$

$\Rightarrow(240)/(x)- (120)/(x)-(120)/(x+10)=\frac25$

$\Rightarrow(240-120)/(x)-(120)/(x+10)=\frac25$

$\Rightarrow(120)/(x)-(120)/(x+10)=\frac25$

$\Rightarrow(120(x+10)-120x)/(x(x+10))=\frac25$

$\Rightarrow(120x+1200-120x)/(x^2+10x)=\frac25$

$\Rightarrow(1200)/(x^2+10x)=\frac25$

$\Rightarrow 2(x^2+10x)=1200* 5$

$\Rightarrow (x^2+10x)=(1200* 5)/(2)$

$\Rightarrow (x^2+10x)=3000$

$\Rightarrow x^2+10x-3000=0$

$\Rightarrow x^2+60x-50x-3000=0$

⇒x(x+60)-50(x+60)=0

⇒(x+60)(x-50)=0

⇒x= -60, 50

The speed could not negative.

So, x=50

Therefore the speed of automobile when it was driving from A to B was 50 km/ h.

At what distance of separation, r, must two 3.20 x 10-9 Coulomb charges be positioned in order for the repulsive force between them to be 83.4 N?

Answers

F = q₁*q₂* C / r²

F =83.4
q₁ = q₂ = 3.2 * 10⁻⁹
C couloumb constant 8.9 * 10⁹

solve for r

I'm not 100% sure but I think the answer is 60.4, because you multiply 3.20 by 10, to get 32 - 9 = 23, then subtract 23 from 83.4. Hope this helps you, and good luck!!!

Help!6. Assume a position vs time graph displays a horizontal line, what does this represent?
A. Constant Velocity
B. 0 Acceleration

Answers

if it is horizontal line, that means position is same but time is increasing.

velocity=0 . particle is not even moving

For which of these scenarios is total internal reflection possible?

Answers

TIR is possible whenever light is travelling from a more optically dense medium to a less optically dense medium. You didnt provide any scenarios but just look up refractive indexes of the mediums the light is travelling through and if it is travelling from a more dense to a less dense, TIR is possible

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