Which statement best describes the gravitational force between objects?(1 point)
Responses
Objects exert a gravitational force on every other object.
Objects exert a gravitational force on every other object.
Only large massed objects exert gravitational force on objects close to them.
Only large massed objects exert gravitational force on objects close to them.
Objects exert a gravitational force only on objects close to them.
Objects exert a gravitational force only on objects close to them.
Only large massed objects exert gravitational force on every other object.
Objects exert a gravitational force on every other object.
Calvin touches a negatively charged rod to a neutral metal sphere located on an insulated stand. What will happen to the electrons when the negatively charged rod touches the metal sphere?(1 point)
Responses
electrons will move from the sphere to the rod
electrons will move from the sphere to the rod
electrons will move from the rod to the sphere and spread out
electrons will move from the rod to the sphere and spread out
electrons will move from the rod to the sphere but stay close together
electrons will move from the rod to the sphere but stay close together
electrons will move from the sphere to the rod and stay close together
electrons will move from the sphere to the rod
Kennedy has two magnets. She would like to determine how much magnetic energy is stored in each one. What would be the best way for her to determine which magnet has the most magnetic energy?(1 point)
Responses
Attach wires to the ends of each magnet and measure the flow of electricity going through the wires.
Attach wires to the ends of each magnet and measure the flow of electricity going through the wires.
Put each magnet into a beaker of water to see how much water it displaces.
Put each magnet into a beaker of water to see how much water it displaces.
Measure how close each magnet can get to a metal object before picking it up.
Measure how close each magnet can get to a metal object before picking it up.
Record the weight of each magnet by measuring it on a balance scale.
Measure how close each magnet can get to a metal object before picking it up.
Bobby hangs two inflated balloons from 2-meter strings so that they touch. He then holds the balloons apart and rubs each balloon 5 times with animal fur. He then releases the balloons. The balloons now hang a small distance apart from one another:
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The next step in Bobby's procedure is to touch the balloons with a metal rod and allow them to settle, and then to rub them 10 times with animal fur. Which result should he expect, and why?
(1 point)
Responses
The balloons will hang at the same elevation, because electrical repulsion is an unvarying phenomenon which results from the existence of charge and not its quantity.
The balloons will hang at the same elevation, because electrical repulsion is an unvarying phenomenon which results from the existence of charge and not its quantity.
The balloons will hang at a greater elevation, because they will have greater charges so the force of electrical repulsion between them will be greater.
The balloons will hang at a greater elevation, because they will have greater charges so the force of electrical repulsion between them will be greater.
The balloons will hang at a smaller elevation, because more thoroughly rubbing them will more completely remove their charges, reducing the electrical repulsion between them.
The balloons will hang at a smaller elevation, because more thoroughly rubbing them will more completely remove their charges, reducing the electrical repulsion between them.
The balloons will hang straight down or more closely together, because a larger number of rubs with fur will give them opposite rather than like electrical charges
The balloons will hang at a greater elevation, because they will have greater charges so the force of electrical repulsion between them will be greater.
Jade has an iron rod around which she wraps copper wire. She places the device on a table near a compass. What will she observe about the compass if she sends current through the copper wire?(1 point)
Responses
The needle of the compass will show no effect.
The needle of the compass will show no effect.
The needle of the compass will point toward the device.
The needle of the compass will point toward the device.
The needle of the compass will stop working.
The needle of the compass will stop working.
The needle of the compass will spin in circles.