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jok3333 [9.3K]
3 years ago
8

A student wants to test the force of magnetism by placing objects on top of a piece of cardboard and then moving them with a mag

net placed under the cardboard. Which items will help the student with this investigation?
Physics
1 answer:
Dmitry_Shevchenko [17]3 years ago
3 0

Answer:

Any material that has ferromagnetic property

Explanation:

Materials such as  iron, nickel or cobalt are ferromagnetic element as they behave as small magnets in the presence of moving electric charge or static magnetic field.

When an external magnetic field is applied these ferromagnetic material align in a way that they contribute to produce a stronger magnetic field in the material and remain aligned even after removal of the external magnetic field.

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What happens to the force between two charges if one of the charges are doubled?
Julli [10]

Answer:

The new force between the charges becomes double of the initial force.

Explanation:

The force acting between charge particles is given by :

F=k\dfrac{q_1q_2}{r^2}

k is electrostatic constant

r is distance between charges

If one of the charges are doubled, then, q₁ = 2q₁

The new force becomes,

F'=\dfrac{2kq_1q_2}{r^2}\\\\F'=2F

So, the new force between the charges becomes double of the initial force.

7 0
4 years ago
The left charge is +1C and the right charge is +1C
PolarNik [594]
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6 0
3 years ago
A submarine sends out a sonar signal (sound waves) in a direction directly downward it take 2.3 s for the sound waves to travel
NISA [10]

Explanation:

Using the formula;

2x = vt

x is the distance up from the ocean floor the submarine is

v is the speed of sound in water

t is the time

Given

t = 2.3s

v = 1490m/s

Required

how high (approx) up from the ocean floor is the submarine x

From the formula;

x = vt/2

x = 1490(2.3)/2

x = 745(2.3)

x = 1,713.5m

Hence the submarine is 1713.5m high up from the ocean floor

5 0
3 years ago
Functions of resistor
Finger [1]

Answer:

First fall Resistor mean passive two terminal electrical components that implements electrical resistance as a circuit an then is function are used to reduce current flow , adjust single level to divide voltage ,terminate transmission.

4 0
4 years ago
What conversion factor is needed to change from kilometers to meters?
ELEN [110]

The conversion factor needed to change from kilometers to meters is

D) 1000

Explanation:

The meter (m) is the SI units to measure distance.

The kilometer (km) is a sub-unit, where the prefix 'kilo' stands for 10^3, or 1000. This means that:

1 km = 1000 m

Therefore, if we have a length expressed in kilometers, we just need to multiply by 1000 to get the corresponding length in meters.

For instance, if we have a length of

L = 3.47 km

To convert in meters, we do:

L = 3.47 km \cdot (1000 \frac{m}{km})=3470 m

Learn more about distance here:

brainly.com/question/3969582

#LearnwithBrainly

5 0
3 years ago
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