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svetoff [14.1K]
3 years ago
11

Explain that power is dot product of force and velocity?​

Physics
2 answers:
katovenus [111]3 years ago
4 0

Answer:

Power is the rate of change of force dotted into displacement, added to the force dotted to the rate of change of displacement. ... Power is the rate of change of force dotted into displacement, added to the force dotted to the rate of change of displacement. Rate of change of displacement is velocity

Explanation:

Nataliya [291]3 years ago
3 0

Explanation:

Power is the rate of change of force dotted into displacement which is added to the force dotted to the rate of change of displacement.If the force is constant, then you get the instantaneous power is the force dotted to the instantaneous velocity.

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Thermal energy and temperature both relate to the amount of ______ energy of moving particles of matter.​
Whitepunk [10]

Thermal energy and temperature both relate to the amount of __energy____ energy of moving particles of matter.​

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Explanation:

5 0
2 years ago
The cytoplasm is the watery fluid found within cells. The cytoplasm holds all of the organelles, except _______, in place within
Shalnov [3]

Answer:

The cytoplasm holds all the organelles, except the nucleus.

Explanation:

4 0
3 years ago
I have a picture of the question I need help with,
eduard

Given:

The initial velocity of the object, v=30 m/s

a_t=0

a_c≠0

The time period is Δt.

To find:

The right conclusion among the given choices.

Explanation:

a_t represents the tangential accleration on the object and a_c represents the centripetal acceleration on the object.

The centripetal acceleration is the acceleration that keeps the object in its circular path. The centripetal force only changes the direction of the velocity and not the magnitude.

Thus the magnitude of the velocity of the object remains the same after a time interval of Δt. But the direction of the velocity of the object will be changed and will be unknown after Δt seconds.

Final answer:

Thus the object will be traveling at 30 m/s in some unknown direction.

Therefore, the correct answer is option a.

7 0
1 year ago
A flat loop of wire consisting of a single turn of cross-sectional area 8.00 cm2 is perpendicular to a magnetic field that incre
Evgen [1.6K]

Complete Question

A flat loop of wire consisting of a single turn of cross-sectional area 8.00 cm2 is perpendicular to a magnetic field that increases uniformly in magnitude from 0.500 T to 1.60 T in 0.99 s. What is the resulting induced current if the loop has a resistance of 1.20  \ \Omega

Answer:

The current is   I =  0.0007 41 \ A

Explanation:

From the question we are told that

   The  area is  A = 8.00 \ cm^2  = 8.0 *10^{-4} \  m^2

   The initial magnetic field at t_o = 0 \ seconds  is B_i = 0.500 \ T

   The magnetic field at t_1 = 0.99 \ seconds is  B_f  = 1.60 \ T

     The resistance is  R = 1.20  \ \Omega

Generally the induced emf is mathematically represented as

      \epsilon  =  A * \frac{B_f - B_i }{ t_f - t_o }

=>   \epsilon  =  8.0 *10^{-4} * \frac{1.60  - 0.500 }{ 0.99- 0  }

=>   \epsilon  = 0.000889 \ V

Generally the current induced is mathematically represented as

     I = \frac{\epsilon}{R }

=>  I = \frac{0.000889}{ 1.20 }  

=>  I =  0.0007 41 \ A  

6 0
2 years ago
Cool facts about satellites ???
svetoff [14.1K]
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There are over 2,500 satellites in orbit around the Earth.
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