Paul sprinkles iron filings onto a piece of paper near a bar magnet. The iron filings quickly become arranged in a pattern all around the bar magnet. Which argument does this evidence BEST support?
Larger magnets can attract more objects.
b
A magnet can attract magnetic objects through various materials.
c
Only objects that are made of metal have a magnetic field.
d
Magnetic fields exist between objects that are not in contact with each other.
9 answers
d. Magnetic fields exist between objects that are not in contact with each other.
Which statement best describes gravitational force?
a
Only objects with a large mass exert gravitational force on every other object.
b
Objects exert a gravitational force on every other object.
c
Objects exert a gravitational force only on objects close to them.
d
Only objects with a large mass exert gravitational force on objects close to them.
a
Only objects with a large mass exert gravitational force on every other object.
b
Objects exert a gravitational force on every other object.
c
Objects exert a gravitational force only on objects close to them.
d
Only objects with a large mass exert gravitational force on objects close to them.
b. Objects exert a gravitational force on every other object.
A student is investigating the distribution of charges in insulators. The student will place an aluminum metal can on top of a foam cup and touch the side of the foam cup with a negatively charged rod. The set up for the investigation is shown in the diagram.
What will MOST LIKELY happen to the electrons when the rod touches the foam cup?
a
The electrons will pass from the foam cup to the aluminum can, and both the foam cup and the aluminum can will become positively charged.
b
The electrons will pass from the foam cup to the aluminum can, and both the foam cup and the aluminum can will become negatively charged.
c
The electrons will pass to the foam cup but will remain in a localized, positively charged area on the cup where the rod was placed.
d
The electrons will pass to the foam cup but will remain in a localized, negatively charged area on the cup where the rod was placed.
What will MOST LIKELY happen to the electrons when the rod touches the foam cup?
a
The electrons will pass from the foam cup to the aluminum can, and both the foam cup and the aluminum can will become positively charged.
b
The electrons will pass from the foam cup to the aluminum can, and both the foam cup and the aluminum can will become negatively charged.
c
The electrons will pass to the foam cup but will remain in a localized, positively charged area on the cup where the rod was placed.
d
The electrons will pass to the foam cup but will remain in a localized, negatively charged area on the cup where the rod was placed.
d. The electrons will pass to the foam cup but will remain in a localized, negatively charged area on the cup where the rod was placed.
Which of the following statements regarding electric insulators is correct?
a
Electric insulators are good heat conductors.
b
Charges within electric insulators do not readily move.
c
Electric charges move freely in electric insulators..
d
Electric insulators have high tensile strength.
a
Electric insulators are good heat conductors.
b
Charges within electric insulators do not readily move.
c
Electric charges move freely in electric insulators..
d
Electric insulators have high tensile strength.
b. Charges within electric insulators do not readily move.
When a plastic rod is rubbed with a wool cloth, the wool acquires a positive charge. What is the best explanation for this effect?
a
protons are transferred to the rod
b
protons are transferred to the cloth
c
electrons are transferred to the rod
d
electrons are transferred to the cloth
a
protons are transferred to the rod
b
protons are transferred to the cloth
c
electrons are transferred to the rod
d
electrons are transferred to the cloth
d. Electrons are transferred to the cloth.