All categories

3 years ago

Anne is trying to attract her metal pencil box with a magnet from the other side

Chemistry

1 answer:

Dima020 [189]3 years ago

5 0

Answer:

The pencil box is too far away from the magnet to make it move.

Explanation:

The most likely scenario here is that the pencil box is too far away from the magnet to make it move.

A magnet has a force field around it which dictates the region where magnetic influences can be felt when a magnetic body is brought near it.

Outside the force field, a magnet has no effect on a magnetic body.

Since the magnet is not attracting or repelling the metallic box of pencils, they most be located outside the field of force of the magnet.
When they are within the force field, repulsion or attraction occurs and the field draws the metal to itself or repel.

Objects that are far away from a magnetic source will feel no effect of the force field of a bar magnet.

You might be interested in

Please helpppppppppppppppppppppppp

Harrizon [31]

Answer: Look it up on the internet

Explanation: hi just wanted to tell you youre amazing

6 0

3 years ago

5. How can you tell the difference between CuS and Cu2S

Oxana [17]

Prominent copper sulfide minerals include Cu2S (chalcocite) and CuS (covellite).

8 0

3 years ago

Preserving food by freezing controls reaction rates by

kykrilka [37]

Answer:

D) both a and c are correct

Explanation:

The reaction rate is a measure of the speed of a chemical reaction. The factors that affects the rate of a chemical reaction are itemised below:

Nature of the reactants
Concentration of the reactants or pressure(if gaseous)
Temperature
Presence of catalyst
Sunlight

Our concern here is temperature. Temperature affects a reaction considerably. Average kinetic energy is directly proportional to the temperature of the reacting particles. When the temperature of a reacting system is increase, the frequency of ordinary and effective collisions per unit time increases. A decrease in temperature implies that the number of collisions also decreases.

3 0

3 years ago

Match the set of measurements of the boiling point of water with the best

Mashcka [7]

Answer:

aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

Explanation:

6 0

3 years ago

A system gains 687 kJ of heat, resulting in a change in internal energy of the system equal to 156 kJ. How much work is done?

Maslowich

Answer:

w = -531 kJ

1. Work was done by the system.

Explanation:

Step 1: Given data

Heat gained by the system (q): 687 kJ (By convention, when the system absorbs heat, q > 0).

Change in the internal energy of the system (ΔU°): 156 kJ

Step 2: Calculate the work done (w)

We will use the following expression.

ΔU° = q + w

w = ΔU° - q

w = 156 kJ - 687 kJ

w = -531 kJ

By convention, when w < 0, work is done by the system on the surroundings.

4 0

2 years ago