Why does a solid change to liquid when heat is added

1 answer:

8 0

heat excites molecules at their "lattice" sites. Enough to break the lattice bonds set the molecules free of each other and ... melt.

You might be interested in

An train car of total mass of 13000 kg is pulling into a station and slowing down with an acceleration of -4.56 m/s^2. Before th

lys-0071 [83]

<h3>Answer:</h3>

-4.73 m/s²

<h3>Explanation:</h3>

Each jumper represents about 1/2 of 1% of the mass of the train, so together they total about 3.5% of the mass of the train. If the mass decreases by 3.5% and the braking force remains the same, the acceleration (magnitude) will increase by about 3.5%.

The acceleration will be about 0.17 m/s² more (in magnitude) than it was, or about -4.73 m/s².

4 0

3 years ago

A 1700kg rhino charges at a speed of 50.0km/h. what is the magnitude of the average force needed to bring the rhino to a stop in

klio [65]

First, let's convert the initial speed of the rhino:
$v_i = 50 km/h = 13.9 m/s$
The acceleration of the rhino is given by:
$a= \frac{v_f-v_i}{t}= \frac{0-13.9 m/s}{0.5 s}=-27.8m/s^2$
where the negative sign means it is a deceleration. We can neglect the negative sign since we are interested only in the magnitude of the force applied, which is given by Netwon's second law:
$F=ma = (1700 kg)(27.8 m/s^2)=4.7 \cdot 10^4 N$

7 0

3 years ago

Read 2 more answers

an eco friendly hotel is under construction. Which strategies will help hotel management reach its goal of being eco friendly

uysha [10]

Answer:

To reach the goal to be Eco friendly, the designer must not harm the ecosystem of surrounding in any ways.

Explanation:

Friendly design means that the hotel must not harm the surrounding ecosystem in any way.
The hotels' energy consumption shall be fulfilled by the use of renewable resources like solar, wind energy, etc.
Proper disposal of wastage is the most important term.
No, chemicals are used inside the premises of the hotel for any purpose of cleaning, washing, etc.
The designer must place a garden with grass, trees, and flowers for the fresh air of the hotel.

3 0

3 years ago

What is the final speed if the displacement is increased by a factor of 4?

oksian1 [2.3K]

From the laws of motions:
x = 0.5 at^2 where
x is the displacement
a is the force of gravity (constant = 9.8 m/sec^2)
t is the time taken

Since "a" is constant, therefore:
the displacement is directly proportional to the square of the time.
This means that, increasing the displacement by a factor of 4 would increase the time by a factor of (4)^2 = 16.

8 0

3 years ago

One strategy in a snowball fight is to throw a snowball at a high angle over level ground. While your opponent is watching the f

marin [14]

Answer:

3.60342 seconds

Explanation:

v = Initial velocity of snowball = 25 m/s

g = Acceleration due to gravity = 9.81 m/s²

$\theta_1$ = First angle = 75°