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3 years ago

Classify the three phases of matter according to their

Physics

1 answer:

leva [86]3 years ago

3 0

Answer:

Well, the densities of the condensed phases, solids, and liquids, are more or less constant...

Explanation:

...and not subject to change. The condensed phases are largely incompressible. On the other hand, the density of the gaseous phase is highly variable...and is a state function of temperature, pressure, volume, and amount of gas... And gaseous phases should have an intrinsically low density in comparison to solid and liquid phases...

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A cannon fires a shell straight upward; 1.8 s after it is launched, the shell is moving upward with a speed of 17 m/s. Assuming

goblinko [34]

To solve this problem we will apply the concepts of acceleration according to the laws of kinetics. Acceleration can be defined as the change in velocity per unit time, that is,

$a = \frac{v-u}{t}$

Here,

v = Final velocity

u = Initial velocity

t = Time

Rearranging to find the initial velocity,

$u = v-at$

Now the acceleration is equal to the gravity, then,

$u = v+gt$

$u = 17+(9.8)(1.8)$

$u = 34.64m/s$

The velocity of the shell at 5.5s after the launch is,

$v = u+at$

$v = u-gt$

$v = 34.64-(9.8)(5.5)$

$v = -19.26m/s$

Therefore the magnitude of the velocity of the shell at 5.5s is -19.26m/s

5 0

3 years ago

Ohms law? explanation.

shusha [124]

Answer:

$\boxed{ \bold{ \sf{see \: below}}}$

Explanation:

$\boxed{ \bold{ \underline{ \huge{ \boxed{ \sf{ohm's \: law}}}}}}$

The relation between current through a metallic conductor and potential difference across its ends was studied systematically by a German physicist , George Simon Ohm in 1826 AD . This relation is now known as Ohm's law. It states that the electric current passing through a conductor is directly proportional to the potential difference across its two ends at a constant physical condition [ Temperature , cross - sectional area , length , nature of material etc ]

Hope I helped!

Best regards!!

4 0

4 years ago

Which result occurs during an exothermic reaction?

baherus [9]

Answer:

Explanation:

Chemical reactions that release energy are called exothermic. In exothermic reactions, more energy is released when the bonds are formed in the products than is used to break the bonds in the reactants. Exothermic reactions are accompanied by an increase in temperature of the reaction mixture.

3 0

3 years ago

Two prominent research groups came to the same surprising conclusion after taking measurements of the luminosity of Type Ia supe

WARRIOR [948]

Answer:

A. True

Explanation:

Type la supernova can be described as a phenomenon whereby two stars are in orbit with one another .

Recently , two prominent research groups came to the same surprising conclusion after taking measurements of the luminosity of Type Ia supernovae at great distances that the universe is accelerating while it expands.

5 0

3 years ago

How would you expect energy to change her in a chemical reaction?

igor_vitrenko [27]

The correct answer is option (c) i.e. Energy will be converted into another form.

During a chemical reaction, energy remains unchanged, It just gets converted into another form and doesn’t increases or decreases. Excess energy is released in the form of heat, light during a chemical reaction and thus, proving the law of conservation of energy which says, energy can neither be created nor destroyed. It just gets converted from one form to another form.

6 0

3 years ago