Which of the following has the greatest magnitude?30 Newtons
1 Newton
. 10 Newtons

Iron shavings ,compass and galvanometer use to determine the direction of the magnetic field lines around a magnet.

What is electromagnet?

An electromagnet is a magnet whose magnetic field is generated by an electric current. Wire coiled into a coil is used to make electromagnets.

A current flowing through the wire produces a magnetic field that is focused in the hole.

A tiny compass may be used to map out magnetic field lines. As illustrated, The compass is moved from point to point around a magnet, with a small line drawn in the direction of the needle at each point.

The course of the magnetic field line is then shown by joining the lines together.

Hence, iron shavings ,compass and galvanometer use to determine the direction of the iron magnetic field lines around a magnet.

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The Answer are:

1. iron shavings

2. compass

3. galvanometer

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The weight of an object is the force it experience by the gravitational pull of the planet. The gravitational pull by earth is greater than that from moon. This leads to greater weight in earth than in moon.

What is gravitational force ?

Gravitational force is a kind of force by which an object attracts other objects into its center of mass. The force exerted between the objects depends on the mass and distance between them.

Earth exerts a gravitational pull to every objects on its surface and that's why we are standing on the ground. We experience a weight downwards due to this force.

The acceleration due to gravity  in earth = 9.8 m/s²

g in moon = 1.63m/s².

then weight = m g

the weight of a 10 kg iron bar in earth is 98 N and that in moon will be 16.3 N.

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Answer:

The decrease in the downward force that a mass of iron can exert on the moon versus the force it exerts on earth is due to:

• The force of gravity on Earth is greater than the force of gravity on the moon.

Explanation:

To recognize the calculation within the statement, you must know that the Newton unit is equal to:

• Newton = (Kilogram * meter) / second ^ 2

And that the gravities of the Earth and the Moon are:

• Earth gravity = 9.807 m / s ^ 2
• Moon gravity = 1.63 m / s ^ 2

Finally, you must know the force formula (since we are talking about a descending force):

• Force = mass * acceleration (gravity is a measure of acceleration)

Since the mass in both cases is the same (10 kilograms), the variation in acceleration will provide different values of descending force, as shown below, replacing the values:

1. Downward force on Earth = 10 Kg * 9,807 m / s ^ 2 = 98.07 Kg * m / s ^ 2 = 98.07 Newtons.
2. Downward force on the Moon = 10 Kg * 1.63 m / s ^ 2 = 16.3 Kg * m / s ^ 2 = 16.3 Newtons.

As you can see, when it comes to force, the less acceleration (in this case less gravity), the lower the downward force will be with a mass of equal weight.

C: "The students pass the envelope from one student to the next until it travels across the room."

To quote ck12, "The particles of the medium just vibrate in place. As they vibrate, they pass the energy of the disturbance to the particles next to them, which pass the energy to the particles next to them, and so on."