Electric Forces Act on Charged Objects
When someone walks across a carpet, their socks pick up many electric charges. Later in the day, these charges are no longer present on the socks. What most likely happened to the charges?
The charges transferred to another object
When a magnet is cut in half, what do you think happens? Do you think each half is still magnetic? Would each half have a north and south pole? Explain your reasoning.
When the magnet cuts in half one half will have a north pole and the other half will have a south pole because each half of the magnet is similar to a small magnet. Each magnet still has a north and south pole when pulled apart meaning they have no more magnetic force.
When you throw a ball, what force or forces act on the ball when it is flying through the air? Is your hand still applying a force on the ball?
The ball is being acted upon by gravity as well as by air resistance. Your hand is no longer applying force
what is mass measured in
mass is measured in grams and kilograms.
what is gravity
is a force of attraction between objects due to their masses
An inflated, negatively charged balloon is moved toward a stream of water from a faucet. What will happen to the water molecules?
They will develop a slightly positive charge so the water moves towards the balloon
Why are iron nails attracted to magnets, but not attracted to other iron nails?
The iron nails attract to magnets because the nails don’t have magnetic domain alignment unless they are near a permanent magnet.
Describe how the strength of a field changes as distance from the field's source increases
the strength of the field decreases as the distance from the field's source increases and that the strength decreases faster at longer distances
what does the law of universal gravitation
the law of universal gravitation states that all matter is attracted to all other matter
what is an electric field
is the area around a charged object in which another charged object is affected by the electric force
What happens when a rubber rod is rubbed with a piece of fur, giving the rod a negative charge?
Negative charges are moved from the fur to the rod
Electric current is a movement of electric charges. If a wire is connected to an electric power source, such as a battery, electric charges will move through the wire. What will be the effect on the magnetic field around the wire as these charges move through the wire?
The effect on the magnetic field would be that the magnetic field will move around.
What are some of the differences between a gravitational force and a magnetic force
gravitational forces are always attractive, whereas magnetic forces can be attractive or repulsive
Use the law of universal gravitation to explain how gravity affects the motion of the basketball during a free-throw attempt
what is a field
is the area in which a force that acts at a distance can be detected
Describe how a neutral material becomes attracted to a negatively charged object brought near it
The charges in the neutral object move around because of the nearby object. The negative charges in the neutral object that are closest to the negatively charged object are repelled, and the neutral object becomes positively charged on the side closest to the charged object. As a result, the neutral object becomes attracted to the charged object.
Why does wrapping wire into a solenoid shape increase the strength of the magnetic field?
It increases the strength because the loops of wire generate a stronger, smaller magnetic field than a straight wire does.
the density of the iron fillings show the strength of the magnetic field. Rank the strength of the magnetic field in different spots by labeling where the field is STRONG, MEDIUM, and WEAK
1. medium 2. strong 3. weak
why do planets and other bodies in the solar system orbit the sun rather than another body in the solar system?
the sun is much more massive than any other object in the solar system. Therefore, the pull of gravity toward the sun is stronger than the pull toward other bodies.
what is electromagnetic induction
occurs when a current is generated by a changing magnetic field
A glass rod is rubbed briefly with silk and the rod becomes able to attract and lift a number of small pieces of paper. If the rod is rubbed with silk for a longer period of time, explain what will happen and why.
The rod will be able to pick up more paper when it is rubbed for an additional period of time because it acquires more charge, which will make the electric force between the rod and paper stronger.
Using a stronger current will it create a larger or smaller change in the magnetic field and cause less or more electric charges to move?
larger change and more electric charges.
imagine that you ran some jeans through a dryer and they became positively charged. How would you draw field lines around the jeans?
the field lines around the jeans would point away from the jeans and be denser close to the jeans
what is the cavendish experiment?
the first experiment to measure the force of gravity between objects.
what is an electric charge
is a physical property of all matter that leads to electric and magnetic interactions.