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3 years ago

How is mass and inertia related

1 answer:

4 0

The tendency of an object to resist changes in its state of motion varies with mass. Mass is that quantity that is solely dependent upon the inertia of an object. The more inertia that an object has, the more mass that it has. A more massive object has a greater tendency to resist changes in its state of motion.

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Which would show an example of how physical changes are reversible?

kondor19780726 [428]

Answer:

Melting tin and then cooling it into a mold

Explanation:

When you melt something, and when it cools it returns to its physical state, therefore the physical changes are reversible. For example, take chocolate. When chocolate melts its liquid, then when it's in a colder situation it becomes solid again and so on, the changes are reversible.

8 0

3 years ago

Read 2 more answers

3/122 The collar has a mass of 2 kg and is attached to the light spring, which has a stiffness of 30 N/m and an unstretched leng

gavmur [86]

Explanation:

According to the law of conservation of energy, work done by the force is as follows.

$W_{F} = F Cos (30^{o}) \times 1.5$

= 64.95 J

Now, gain in potential energy is as follows.

P.E = mgh

= $2 \times 9.8 \times 1.5$

= 29.4 J

Gain in potential energy will be as follows.

= $\frac{1}{2}kx^{2}_{2} - \frac{1}{2}kx^{2}_{1}$

= $\frac{1}{2} \times 30 N/m \times [(2.5 - 1.5)^{2} - (2 - 1.5)^{2}]$

= 11.25

As,

$W_{f} = u_{1} + u_{2} + \frac{1}{2}mv^{2}$

$\frac{1}{2}mv^{2} = W_{f} - u_{1} - u_{2}$

= 64.95 J - 29.4 - 11.25

= 24.3

$v^{2} = \frac{24.3 \times 2}{2}$

v = 4.92 m/s

Therefore, we can conclude that relative velocity at point B is 4.92 m/s.

7 0

3 years ago

When equals of water and of methane gas absorb the same amount

Sindrei [870]

Answer:

The property helps to explain this difference is forces between molecules.

Option c

Explanation:

The exact heat of water is $75.28 J/ mol K$

The exact heat of methane is $35.7 J/mol K$

This is due to the polarity and the hydrogen bonding.

It takes more energy to break these bonds than methane, therefore, we would think water to have a higher specific heat due to these active forces.

So this property helps to explain there is differences in forces between molecules.

7 0

3 years ago

Read 2 more answers

What is the princple behind electric generator

Liula [17]

Look, according to newton’s law of the conservation of mass power, the principle behind the electric generator would be when a conductor is moved in a magnetic field than the current is moved buh the conductor

4 0

4 years ago

What is the primary purpose of an astronomical telescope?

Fofino [41]

Collecting light and bringing it to focus.

6 0

3 years ago