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12345 [234]
3 years ago
6

What is the kinetic energy of a 1,350 kg car and 12 m/s?

Physics
1 answer:
matrenka [14]3 years ago
5 0
Kinetic energy equals (1/2)mass*velocity (1/2) * 1350kg * 12 Now type that into the calculator
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A neutron is confined in a one-demensional potential box of width 5.0 x 10^-15 m. Calculate the minimum kinetic energy of the ne
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Answer:

E_1=1.31\times 10^{-12}\ J

Explanation:

Given that,

Width of a one dimensional potential box, x=5\times 10^{-15}\ m

The energy of a particle in one dimensional box is given by :

E_n=\dfrac{n^2h^2}{8mx^2}

h = Planck's constant

m = the mass of the proton

For minimum kinetic energy, n = 1

E_1=\dfrac{(6.63\times 10^{-34})^2}{8\times 1.67\times 10^{-27}\times (5\times 10^{-15})^2}

E_1=1.31\times 10^{-12}\ J

So, the minimum kinetic energy of the neutron is 1.31\times 10^{-12}\ J. Hence, this is the required solution.

8 0
3 years ago
You adjust the temperature so that a sound wave travels more quickly through the air. You increase the temperature from 30°C to
earnstyle [38]

The correct answer to the question is : D) 352.6 m/s.

CALCULATION :

As per the question, the temperature is increased from 30 degree celsius to 36 degree celsius.

We are asked to calculate the velocity of sound at 36 degree celsius.

Velocity of sound is dependent on temperature. More is the temperature, more is velocity of sound.

The velocity at this temperature is calculated as -

                            V = 331  + 0.6T m/s

                               = 331 + 0.6 × 36 m/s

                               = 331 + 21.6 m/s

                               = 352.6 m/s.

Here, T denotes the temperature of the surrounding.

Hence, velocity of the sound will be 352.6 m/s.

5 0
3 years ago
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