The boiling point of the crystalline mass is 50° Celsius
200° Celsius
300° Celsius
400° Celsius

Answers

Answer 1

Answer:

Boiling point is at 200° Celsius

Explanation:

Matter exists in three states:

- Solid state: the molecules of the element are fixed in their place and strongly bonded to each other - therefore, they can only vibrate around their fixed position.

- Liquid state: the molecules of the element are free to slide past each other - however, there are still intermolecular forces that keep them close to each other

Gas state: the molecules of the element are completely free to move far from each other

Evaporation is the process that occurs when a substance changes from liquid to gas state. This process occurs when the temperature of the substance reaches its boiling point.

In the graph given in this problem (find it in attachment), we observe that:

- At first, the temperature increases up to 50 Celsius; this is the solid state

- Then the temperature stops increasing --> this is the transition of phase from solid to liquid (melting), which occurs at a constant temperature of 50 Celsius (melting point)

- Then, the temperature increases again up to 200 Celsius (liquid state)

- Then the temperature stops increasing again --> this is the transition of phase from liquid to gas (evaporation), which occurs at a constant temperature of 200 Celsius, which is therefore the boiling point

- Then, the temperature increases again (gas state)

Therefore, the boiling point of the substance in this problem is

200° Celsius

Learn more about temperature:

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Answer 2

Answer:

Answer:

Explanation:

200 degrees Celcius.

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Answer my question plzz !!
any body

Answers

Answer:

The height is 80 meters.

Explanation:

The equation for the distance in the second segment of the fall is as below. In it, we use the initial velocity v1 that the ball had after completing the first segment. From this equation, v1 can be determined:

$h_2 = (1)/(2)gt_2^2+v_1t_2=0.5\cdot 10(m)/(s^2)\cdot 4 s^2+v_1\cdot 2 s=60m\implies\nv_1 = 20(m)/(s)$

Next, we use the kinematic equation for velocity at the end of the first segment of a free fall, to determine h1:

$v_1^2 = 2gh_1+v_0^2 = 2gh_1\implies h_1 = (v_1^2)/(2g)=20m$

The total height is then

$h = h_1 + h_2 = 20m + 60 m = 80m$

WHAT IS THE UNBALANCED FORCE THAT SLOWS DOWN SLIDING DESKS AND MOVING CARS

Answers

Friction is a forces that slows things down.

friction slows it down

7. Alice holds a black belt in Taekwondo and her fist has a mass of 0.5 kg. Her fist obtains a velocity of 5 m/s in 0.1 seconds from rest. Evaluate the average net force applied to the fist.

Answers

Answer: 25 N

Explanation:

the fist hit by the black belt Alice in the Taekwondo has been given to have a mass of 0.5 kg which acquires a velocity of 5 m/s in a time of 0.1 sec, therefore, the average net force which is being applied to the fist can be calculated by the following method,

Given, mass m=0.5 kg, velocity v=5 m/s, time t=0.1 sec

As we know that, acceleration

$a=(v-u)/(t)=(5-0)/(0.1)=50 \mathrm{m} / \mathrm{s}^(2)$

Thereby,

$\text { Force }=\text { mass } * \text { acceleration }=0.5 * 50=25 N$

Answer:

25N

Explanation:

Find acceleration first

A=v-u/t

acceleration = 5/0.1s =50m/s^2

then find net force using f=mass x acceleration, which iin this case is 25N

Whenever the motion of an object change,____ has been applied.

Answers

Whenever the motion (speed or direction) of an object changes, we say that acceleration has occurred. From Newton's First Law of Motion, we know that force has been applied to the object.

Which best describes the difference between radiation and conduction? Conduction cannot happen when both objects are solids. Conduction requires two objects to be in physical contact.
Conduction can occur between two objects that are very far apart.
Conduction decreases the movement of the atoms in both objects.

Answers

Conduction is went two objects are directly touching each other. They must come into contact with each other. Like sitting on a cold bench that eventually becomes warm due to your body heat. Think of radiation as the suns rays when you get sunburnt.
Your Answer would be B. Conduction requires two objects to be in physical contact.
Hope this helps!

Identify each of the cell structures in the figure