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tresset_1 [31]
3 years ago
9

Acceleration is best defined as the rate of change of _______ of an object.

Physics
1 answer:
Elden [556K]3 years ago
3 0

Answer: B velocity

Explanation:

Acceleration = Velocity difference / time

Acceleration is a vector it can be happened due to forces of the system. If there is no external force acting on a system. There are no acceleration. If velocity is increasing due to Force its called acceleration If velocity is decreasing its called deceleration

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Assuming standard pressure, what physical constants are needed to calculate the change in enthalpy for raising a sample of water
Alik [6]

Answer:

I) Heat capacity of ice (Sensible, ice), II) Enthalpy of fusion of water (Latent, fusion) and III) Heat capacity of water (Sensible, water).

Explanation:

At standard pressure, water has a fusion point and boiling point of 273.15 K and 373.15 K, respectively. Then, the total change in enthalpy is the sum of two sensible indicators and one latent indicator. That is:

\Delta H_{total} = \Delta H_{sensible, ice} + \Delta H_{latent, fusion} + \Delta H_{sensible, water}

The needed physical constants are: Heat capacity of ice (Sensible, ice), Enthalpy of fusion of water (Latent, fusion) and Heat capacity of water (Sensible, water).

8 0
3 years ago
If gravitational pull got three times stronger what happens to your weight?
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7 0
3 years ago
What is the frequency of sound waves whose wavelength is 0.25 m on a day when the air temperature is 25 degree Celsius? Group of
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Answer:1384 Hz

Explanation:

Given

wavelength(\lambda )=0.25 m

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at T=25^{\circ} velocity of sound is 346 m/s

and we know

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v=f\times \lambda

346=f\times 0.25

f=1384 Hz

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