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kodGreya [7K]
2 years ago
14

Wires provide the pathway to carry the electricity from components to components. * 1 point true false

Physics
1 answer:
neonofarm [45]2 years ago
5 0

Answer:

true

Explanation:

as long as it is the right conductive material

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Hello, I am so confused about this problem, could you help ?
iVinArrow [24]

Given:

The masses of the balls, m₁=1 kg

m₂=2 kg

The height of 1 kg ball, h₁=6 m

The height of 2 kg ball, h₂=3 m

To find:

Which of the given statements are true?

Explanation:

From the law of conservation of energy, the energy can neither be created nor be destroyed. As the air resistance is negligible, the initial potential energy of the balls will be equal to their kinetic energy when they reach the ground.

Thus, the kinetic energy of the balls when they reach the ground is given by,

KE=PE=mgh

Where m is the mass of the balls, h is their respective height, and g is the acceleration due to gravity.

Thus the kinetic energy of mass m₁ is,

\begin{gathered} KE_1=1\times9.8\times6 \\ =58.8\text{ J} \end{gathered}

The kinetic energy of mass m₂ is,

\begin{gathered} KE_1=2\times9.8\times3 \\ =58.8\text{ J} \end{gathered}

The velocities of the balls will be given by the equation of kinetic energy.

Thus,

KE=\frac{1}{2}mv^2

Where v is the respective velocities of the balls when they reach the ground.

On rearranging the above equation, the velocities will be given by,

v=\sqrt{\frac{2\times KE}{m}}

On substituting the known values, the velocity of the mass m₁ is

\begin{gathered} v_1=\sqrt{\frac{2\times58.8}{1}} \\ =10.84\text{ m/s} \end{gathered}

The velocity of the mass m₂ is,

\begin{gathered} v_2=\sqrt{\frac{2\times58.8}{2}} \\ =7.7\text{ m/s} \end{gathered}

Thus the balls will have the same kinetic energies when they reach the ground. But the 1 kg ball will have a greater velocity than the 2-kg ball.

The time interval the ball takes is dependent on the height only and not on the mass. Thus the balls will not reach the ground at the same time.

Final answer:

Thus the correct answer is options are option B and option D.

6 0
1 year ago
The helicopter in the drawing is moving horizontally to the right at a constant velocity. The weight of the helicopter is W=4250
Rom4ik [11]

Answer: A) 45503 N b) 16290 N

Explanation:

A)

L = W / cos 21 = 42500 / cos 21 = 45503 N

B)

R = L sin 21 = 45503 x sin 21 = 16290N

3 0
3 years ago
What was the initial velocity of a robot that took 5 m to get to final velocity of 19 m/s at a rate of 3 m/s/s?
Aleks [24]

Answer:

4m/s

v=u+at

19=u+3*5

u=4m/s

5 0
3 years ago
Oil flows upward in the wick of a lantern because of the liquid property called
Firdavs [7]
The answer is A because the lighter or heavier the liquid is (in this case it depends) it flows up.
5 0
3 years ago
Read 2 more answers
If we double the mass of the sun, what would happen to the gravitational force between the sun and earth?
Sphinxa [80]
It would increase
because the force is directly proportional to the Value of masses given
4 0
3 years ago
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