A push or a pull is called _____. User: The metric unit of force is the ____

How much heat is given off when 210.0g of water at 0 degrees freezes into ice?

Sergio [31]

In the freezing physical change, when 210.0 g of water a 0 degrees freezes into ice, it gives off 71.0 kJ of heat.

<h3>What is freezing?</h3>

It is a physical change in which liquids give off heat to form solids.

We have 210.0 g of water at 0°C. We can calculate the amount of heat given off when it freezes into ice using the following expression.

Q = ΔH°fus × m

Q = 0.334 kJ/g × 210.0 g = 70.1 kJ

where,

Q is the heat released.
ΔH°fus is the latent heat of fusion.
m is the mass.

In the freezing physical change, when 210.0 g of water a 0 degrees freezes into ice, it gives off 71.0 kJ of heat.

Learn more about freezing here: brainly.com/question/40140

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5 0

1 year ago

A car is traveling 50mph how long will it take the car to travel 300 miles

baherus [9]

50 mph = 50 miles in one hour
300 divided by 50 = 6 hours

4 0

2 years ago

A bobsled team pushes a 132-kilogram bobsled. If the combined push of the team is 450.0 Newtons and the bobsled also experiences

lesantik [10]

Answer:

A. The bobsled acceleration is 3.14 m/s²

Explanation:

Given:

Mass of the bobsled (m) = 132 kg

Force of push (F) = 450.0 N

Force of friction (f) = 35 N

Let the acceleration of the bobsled be 'a' m/s².

Now, as per Newton's second law, the net force acting on a body is equal to the product of mass and acceleration.

Net force acting on the bobsled is equal to the difference of applied force and friction and is given as:

$F_{net}=F-f\\\\F_{net}=450.0\ N-35\ N=415\ N$

Now, from Newton's second law,

$F_{net}=ma\\\\a=\dfrac{F_{net}}{m}$

Plug in all the values given and solve for 'a'. This gives,

$a=\frac{415\ N}{132\ kg}\\\\a=3.14\ m/s^2$

Therefore, the acceleration is 3.14 m/s². So, option (A) is correct.

7 0

3 years ago

A machine is used to convert heat energy into work energy, and is connected to a cooling system which keeps the machine at a con

vampirchik [111]

The amount of heat energy that must still be removed by the cooling system is 1300 kJ.

<h3>Conservation energy</h3>

The total energy before and after a transformation must be equal.

Based on this principle, the heat energy that must still be removed by the cooling system is calculated as follows;

Input heat energy = out put heat energy

E = h + w

2000 kJ = h + 700 kJ

1300 kJ = h

Thus, the amount of heat energy that must still be removed by the cooling system is 1300 kJ.

Learn more about heat energy here: brainly.com/question/7541718

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4 0

1 year ago

A graduated cylinder contains 20.0ml of water. After a rock is placed in the cylinder, the level rises as shown below. what is t

Anestetic [448]

The volume of the rock, given the data is 14 mL (Option A)

<h3>Data obtained from the question</h3>

From the question given above, the following data were obtained:

Volume of water = 20 mL
Volume of water + rock = 34 mL
Volume of rock =?

<h3>How to determine the volume of the rock</h3>

The volume of the rock can be obtained by calculating the displacement of the water when the rock was added. this can be obtained as follow:

Displacement of water = (Volume of water + rock) - (volume of water)

Displacement of water = 34 - 20

Displacement of water = 14 mL

Thus, the volume of the rock is 14 mL

Learn more about volume of irregular object:

brainly.com/question/27911332

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Complete question:

See attached photo

3 0

1 year ago

A push or a pull is called _____. User: The metric unit of force is the _____.

A push or a pull is called _. User: The metric unit of force is the _.