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zepelin [54]
3 years ago
8

A satellite orbits the Earth at constant speed. Is this an unbalanced or balanced force?

Physics
1 answer:
natulia [17]3 years ago
3 0

Answer:  

An unbalanced force is one that causes a change in the motion of the object to which the force is applied. An object at rest or an object in steady motion continues at rest or in unchanged motion unless it is subjected to an unbalanced force.

Balance forces are two forces acting in opposite directions on an object, and equal in size. Anytime there is a balanced force on an object, the object stays still or continues moving continues to move at the same speed and in the same direction.

Explanation:

A satellite orbiting Earth at constant speed would be considered an unbalanced force because it is an object in steady motion and it will remain in steady motion unless it is subjected to an unbalanced force.

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After meeting the end the wave willa- reflect with larger amplitude.b- disappear.c- reflect with the same displacement. (not inv
Margarita [4]

Answer:

c- reflect with the same displacement. (not inverted)

Explanation:

When a wave goes to an end that is free to move, the reflected wave will be equal to the initial wave but will go to the opposite direction. Since the end of the wave is free to move, the answer is

c- reflect with the same displacement. (not inverted)

7 0
1 year ago
A textbook of mass 2.09kg rests on a frictionless, horizontal surface. A cord attached to the book passes over a pulley whose di
nydimaria [60]

Answer:

(A) 9.7 N

(B) 15.4 N

 (C) I = 0.0045 kg m^{2}

Explanation:

mass of text book (M1) = 2.09 kg

mass of book (M2) = 2.99 kg

diameter of the pulley (d) = 0.12 m

radius (r) = 0.06 m

distance moved (s) = 1.30 m

time (t) = 0.75 s

acceleration due to gravity (g) = 9.8 m/s^[2}

(a) what is the tension in the part of the cord attached to the text book?

the text book is moving horizontally, so the tension in this case becomes

tension = mass x acceleration

we can get the acceleration from s = ut + 0.5 at^{2}

since the books are initially at rest u = 0

s = 0.5 at^{2}

1.3 = 0.5 x a x 0.75^{2}

a = 4.643 m/s^[2}

 

tension (T1) = 2.09 x 4.643 = 9.7 N

(b) what is the tension in the part of the cord attached to the book?

   the book is hanging vertically, so the tension in this case becomes

tension = m x ( g - a )

(g-a) is the net acceleration of the first book

tension (T2) = 2.99 x (9.8 - 4.643) = 15.4 N

(c) What is the moment of inertia of the pulley?

    if the books were to move in the direction of the book, it will cause the pulley to rotate clockwise and if they were to move in the direction of the text book on the table the pulley will rotate in an anticlockwise direction. Taking clockwise rotation of the pulley to be negative while anticlockwise to be positive, we can say  ( T2 - T1 )r = I∝

      where ∝ is the angular acceleration of the pulley relative to its radial  

      acceleration, ∝ = \frac{a}{r}

      ( T2 - T1 )r = I\frac{a}{r}

      I = \frac{(T2 - T1)r^{2}}{a}

      I = \frac{(15.5 - 9.7)0.060^{2}}{4.643}

      I = 0.0045 kg m^{2}

6 0
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zlopas [31]
Bronchial Tubes
hope this helps :)
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4 years ago
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This would be called the battery. Hope this helps.
8 0
3 years ago
All atoms have moving electric charges. why then, aren't all materials magnetic?
Trava [24]
A charge will not experience a force in a magnetic field if it is not moving or if it is moving parallel to the magnetic field. <span>Why </span>aren't all materials magnetic<span>? Most </span>atoms have<span> electrons placed symmetrically so their </span>magnetic<span> fields cancel out.</span>
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