1. A student studying a circuit diagram of a lightbulb, battery, and a switch correctly identifies it as a closer circuit. In this diagram, The lightbulb would be
a. an insulator
b. on***
c. disconnected
d. off
2. The focus of gravity on an object on the surface of Mars is less than the force of gravity on an identical object on the surface of earth. Which of the following is a example why this is true?
a. Mars has more volume than earth
b. Earth has more volume then mars
c. Mars has less mass than earth***
d. Earth has less mass then mars
They both look right
They are right. The circuit is closed, therefore the lightbulb is on. Mars naturally has less mass than Earth, so #2 is also correct.
1. The correct answer is b. on. The student correctly identified the circuit as a closed circuit, which means that the flow of electric current can pass through the lightbulb and illuminate it.
2. The correct answer is c. Mars has less mass than Earth. The force of gravity depends on the mass of an object. Since Mars has less mass than Earth, the force of gravity on an identical object would be less on Mars compared to Earth.
1. To determine the correct answer, we need to understand what a closed circuit is. In a closed circuit, there is a complete path for the electric current to flow, allowing the electrical energy to power the lightbulb. When the circuit is closed, the lightbulb is "on" because the current is flowing through it.
To further explain, a closed circuit refers to the condition where there are no breaks or gaps in the electrical pathway, and the switch is in the "on" position, allowing the current to flow freely from the battery to the lightbulb and back. Therefore, the correct answer is b. on.
2. The force of gravity on an object is related to the mass of the object and the distance from the center of the planet. To determine the correct answer, we need to compare the mass of Mars and Earth.
The force of gravity on an object on the surface of a planet is directly proportional to the mass of that planet. Therefore, the object on Mars experiences less force of gravity than an identical object on Earth because Mars has less mass than Earth.
To recap, the difference in the force of gravity between Mars and Earth is due to the difference in their masses. Thus, the correct answer is c. Mars has less mass than Earth.