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BartSMP [9]
2 years ago
5

6. A student notices that when a weight is hung on a spring, the spring stretches. She decides conduct an experiment to determin

e the relationship between the amount of weight
placed on a spring and the distance the spring stretches. She has five different weights: 25 9,50 9.75 9, 1009, and 125 g. She selects a weight, hangs it on the spring, and
measures how far the spring stretches
What is the dependent variable in this experiment?
O weight hung from the spring
O temperature of the spring
length of unstretched spring
distance the spring stretches
Physics
1 answer:
natima [27]2 years ago
4 0

Answer:

D

Explanation:

She says that the object of the experiment is to see how far the string stretches given a mass attached to the string.

The only thing that is at issue is either the mass or the amount the string stretches.

Nothing else matters.

The dependent variable therefore is the amount the string stretches. So the last choice is the answer.

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Answer:

I don't even know can anybody help this person

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3 years ago
Examples of fixed pulley?​
Neko [114]

Answer:

One example of a fixed pulley is a Flag Pole

Explanation:

A good example of a fixed pulley is a flag pole: When you pull down on the rope, the direction of force is redirected by the pulley, and you raise the flag. Other examples of movable pulleys include construction cranes, modern elevators, and some types of weight lifting machines at the gym.

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3 years ago
Three people pull simultaneously on a stubborn donkey. Jack pulls eastward with a force of 64.7 N, Jill pulls with 61.5 N in the
USPshnik [31]

Answer:

 F = 241.8 N    θ = -18.7

Explanation:

To find the net force, we use Newton's second law, for this we decompose the force using trigonomer

Force 2

    F2 = 61.5 N

   cos 45 = F₂ₓ / F2         F₂ₓ = F2 cos 45

   sin 45 = F₂_y / F2          F₂_y = F2 sin 45

     

force 3

     F3 = 171 N

     cos 45 = F₃ₓ / F3

     sin 45 = F₃_y / F3

the total force can be found with its components

axis x direction (East-West)

      Fₓ = 64.7 +61.5 cos 45 + 171 cos 45

      Fₓ = 229.1 N

Y axis (direction North -Sur)

     F_y = 61.5 sin 45 - 171 sin 45

     F_y = - 77,428 N

the resulting force is

      F = Fx i ^ + Fy j ^

      F = (229.1 i⁻ 77,428 j⁾ N

we can use the Pythagorean theorem to find the module

       F = √ (229.1 2 + 77,428 2)

       F = 241.8 N

let's use trigonometry to find the direction

     tan θ = F_y / Fₓ

     θ = tan⁻¹ (F_y / Fₓ)

     θ = tan⁻¹ (-77,428 / 229.1)

     θ = -18.7

4 0
3 years ago
A lightbulb has an effciency of 8.2%. How much light energy (not heat energy) is generated by the bulb every second if the buld
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It really depends on what the bulb is being used for, since efficiency means how much of the output is USEFUL.
If the bulb is being used for light in a dark room, then it produces (8.2% x 21W) = 1.72 joules per second of light energy.
If the bulb is being used to keep a hamster cage or a fish tank warm, then the 8.2% is the useful part, and the light is the other (91.8% x 21W) = 19.28 joules per second.
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Write scientific name of pea​
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Pisum sativum is the answer
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