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3 years ago

Which of the following is the correct definition of mechanical energy?

Physics

2 answers:

mestny [16]3 years ago

7 0

c. energy and object has.....

Vedmedyk [2.9K]3 years ago

3 0

Energy an object has because of its motion or position . it's chemical engineering and random motion of its atoms and molecules

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HELPPP PLEASEEEEE, BRIANLEST WILL BE GIVEN ON CORRECT!

sleet_krkn [62]

Answer:

a. 25000 J

b. 2500 J/s

Explanation:

Given,

Distance ( s ) = 50 m

Force ( f ) = 500 N

To find : -

Work done ( W ) = ?

Formula : -

W = fs

= 500 x 50

= 25000 J

Therefore,

the work done by the force the horse exerts is

25000 J.

To find : -

Power ( P ) = ?

Formula : -

W = Pt

P = W / t

= 25000 / 10

= 2500 J/s

Therefore,

the power produced if the movement took 10 s

is 2500 J/s.

3 0

3 years ago

Read 2 more answers

Light from an argon laser strikes a diffraction grating that has 4,917 lines per cm. The first-order principal maxima are separa

miss Akunina [59]

Answer:

Wavelength is 4.8x10^-7m

Explanation:

See attached file

3 0

3 years ago

The amount of energy necessary to remove an electron from an atom is a quantity called the ionization energy, Ei. This energy ca

larisa86 [58]

Answer:

The value is $E_i = 1.5596 *10^{-18} \ J$

Explanation:

From the question we are told that

The wavelength is $\lambda = 48.2 nm = 48.2 *10^{- 9 }\ m$

The velocity is $v = 2.371*10^6 \ m/s$

The mass of electron is $m_e = 9.109*10^{-31} \ kg$

Generally the energy of the incident light is mathematically represented as

$E = \frac{h * c}{\lambda}$

Here c is the speed of light with value $c = 3.0 *10^{8} \ m/s$

h is the Planck constant with value $h = 6.62607015 * 10^{-34 } J\cdot s$

$E = \frac{6.62607015 * 10^{-34 }* 3.0 *10^{8}}{48.2 *10^{- 9 }}$

=> $E = 4.12 *10^{-18} \ J$

Generally the kinetic energy is mathematically represented as

$E_k = \frac{1}{2} * m_e * v^2$

=> $E_k = \frac{1}{2} * 9.109*10^{-31} * (2.371*10^6 )^2$

=> $E_k = 2.56 *0^{-18} \ J$

Generally the ionization energy is mathematically represented as

$E_i = 4.12 *10^{-18} - 2.56 *0^{-18}$

=> $E_i = 1.5596 *10^{-18} \ J$

8 0

3 years ago

The acceleration due to gravity of the earth is 9.81 m/s2 and the acceleration due to gravity of the moon is 1.625 m/s2. If your

Viktor [21]

Answer:

686 N

113.75 N

Explanation:

On Earth:

W= mg

= 70 x 9.8

= 686 N

On Moon:

W= mg

= 70 x 1.625

= 113.75 N

3 0

3 years ago

A 47.0 kg uniform rod 4.25 m long is attached to a wall with a hinge at one end. The rod is held in a horizontal position by a w

Crank

Answer:

2.79 m

Explanation:

Use the static equilibrium condition, net torque actin on the system is zero.

$\sum \tau= 0$

$T(Lsin\theta)- Mg\frac{L}{2}-mgx=0$

solve for the distance of the person from the wall x

$x= \frac{TLsin\theta-Mg(L/2)}{Mg}$

now putting the values we get

$x= \frac{1350\times4.25sin30-47\times9.81\times(4.25/2)}{69\times9.80}$

= 2.79 m

4 0

3 years ago