Question
Question 21 A)Christopher and his mother went on a camping trip. His mother struck a match to light a lantern. Which forms of energy did the burning match give off?(1 point) Responses nuclear and solar nuclear and solar nuclear and light nuclear and light solar and thermal solar and thermal thermal and light thermal and light Question 22 A) A metal pot with hot soup in it is placed on a cool stone countertop, as shown in the diagram below. The numbered arrows show the transfer of heat from the pot of soup to the surrounding environment. Which list correctly identifies each method of heat transfer? (1 point) Responses 1 — conduction; 2 — convection; 3 — radiation 1 — conduction; 2 — convection; 3 — radiation 1 — convection; 2 — conduction; 3 — radiation 1 — convection; 2 — conduction; 3 — radiation 1 — radiation; 2 — radiation; 3 — convection 1 — radiation; 2 — radiation; 3 — convection 1 — convection; 2 — conduction; 3 — conduction 1 — convection; 2 — conduction; 3 — conduction Question 23 A)Which best describes energy changes in a system?(1 point) Responses Energy is conserved, but it can be created or destroyed. Energy is conserved, but it can be created or destroyed. Energy is conserved, and it cannot be created or destroyed. Energy is conserved, and it cannot be created or destroyed. Energy is not conserved, and it can be created or destroyed. Energy is not conserved, and it can be created or destroyed. Energy is not conserved, but it cannot be created or destroyed. Energy is not conserved, but it cannot be created or destroyed. Question 24 A) Hannah heats a beaker of water using a burner, as shown in the diagram. Which statement best describes the movement of water molecules in Hannah's beaker, represented by the arrows in the diagram? (1 point) Responses Water molecules move faster near the bottom of the water where they are hotter, but then move slower as they cool and rise due to radiation. Water molecules move faster near the bottom of the water where they are hotter, but then move slower as they cool and rise due to radiation. Water molecules move slower near the bottom of the beaker where they are hotter, but then move faster as they cool and rise due to convection. Water molecules move slower near the bottom of the beaker where they are hotter, but then move faster as they cool and rise due to convection. Water molecules move faster near the bottom of the beaker where they are hotter, but then move slower as they cool and rise due to convection. Water molecules move faster near the bottom of the beaker where they are hotter, but then move slower as they cool and rise due to convection. Water molecules move slower near the bottom of the beaker where they are hotter, but then move faster as they cool and rise due to conduction Water molecules move slower near the bottom of the beaker where they are hotter, but then move faster as they cool and rise due to conduction Question 25 A)A force acting on an object does NO work if:(1 point) Responses the force is greater than the force of friction the force is greater than the force of friction the force is not in the direction of the object's motion the force is not in the direction of the object's motion a machine is used to move the object a machine is used to move the object the object accelerates the object accelerates Question 26 A)Which characteristic remains the same regardless of a change in gravity?(1 point) Responses mass mass weight weight speed speed momentum momentum Question 27 A) Which of the following has a higher kinetic energy? A 1000 kg car rolling at a speed of 5 m/s across the floor or a 1500 kg hippo swimming at a speed of 2 m/s (1 point) Responses the car the car the hippo the hippo their kinetic energies are equal their kinetic energies are equal not enough information to determine not enough information to determine Question 28 A) Where is gravitational potential energy the highest? (1 point) Responses W W X X Y Y Z Z Question 29 A) How can you strengthen an electromagnet? **Choose all that apply.** (4 points) Responses increase the number of wire coils increase the number of wire coils decrease the number of wire coils decrease the number of wire coils decrease the current decrease the current increase the current increase the current Question 30 A)Magnetic fields run from ______________________ to ______________________.(1 point) Responses south, north south, north north, south north, south east, west east, west west, east
Answers
GPT-4o mini
Here are the answers to the questions provided:
**Question 21:**
The correct response is: **thermal and light.** (The burning match gives off thermal energy due to heat and light energy from the flame.)
**Question 22:**
The correct response is: **1 — conduction; 2 — convection; 3 — radiation.** (Heat is transferred from the pot to the countertop by conduction, the movement of hot soup can create convection currents, and heat radiates from the pot.)
**Question 23:**
The correct response is: **Energy is conserved, and it cannot be created or destroyed.** (According to the law of conservation of energy, energy cannot be created or destroyed, only transformed.)
**Question 24:**
The correct response is: **Water molecules move faster near the bottom of the beaker where they are hotter, but then move slower as they cool and rise due to convection.** (Hot water rises, and cooler water sinks, which describes convection currents.)
**Question 25:**
The correct response is: **the force is not in the direction of the object's motion.** (Work is defined as force applied in the direction of motion; if it's not aligned with the motion, no work is done.)
**Question 26:**
The correct response is: **mass.** (Mass remains constant regardless of the gravitational field.)
**Question 27:**
To find the kinetic energy, use the formula KE = 0.5 * mass * velocity^2.
For the car: KE = 0.5 * 1000 kg * (5 m/s)^2 = 12,500 J.
For the hippo: KE = 0.5 * 1500 kg * (2 m/s)^2 = 3,000 J.
The correct response is: **the car.**
**Question 28:**
The answer will depend on the context of the question regarding the items labeled W, X, Y, and Z. Typically, gravitational potential energy is highest at the highest point in a given system, so you would choose the highest labeled position.
**Question 29:**
The correct responses are: **increase the number of wire coils** and **increase the current.** (Both of these methods strengthen the electromagnetic field of the electromagnet.)
**Question 30:**
The correct response is: **north, south.** (Magnetic field lines run from the north pole to the south pole of a magnet.)
Feel free to ask if you have any more questions!
**Question 21:**
The correct response is: **thermal and light.** (The burning match gives off thermal energy due to heat and light energy from the flame.)
**Question 22:**
The correct response is: **1 — conduction; 2 — convection; 3 — radiation.** (Heat is transferred from the pot to the countertop by conduction, the movement of hot soup can create convection currents, and heat radiates from the pot.)
**Question 23:**
The correct response is: **Energy is conserved, and it cannot be created or destroyed.** (According to the law of conservation of energy, energy cannot be created or destroyed, only transformed.)
**Question 24:**
The correct response is: **Water molecules move faster near the bottom of the beaker where they are hotter, but then move slower as they cool and rise due to convection.** (Hot water rises, and cooler water sinks, which describes convection currents.)
**Question 25:**
The correct response is: **the force is not in the direction of the object's motion.** (Work is defined as force applied in the direction of motion; if it's not aligned with the motion, no work is done.)
**Question 26:**
The correct response is: **mass.** (Mass remains constant regardless of the gravitational field.)
**Question 27:**
To find the kinetic energy, use the formula KE = 0.5 * mass * velocity^2.
For the car: KE = 0.5 * 1000 kg * (5 m/s)^2 = 12,500 J.
For the hippo: KE = 0.5 * 1500 kg * (2 m/s)^2 = 3,000 J.
The correct response is: **the car.**
**Question 28:**
The answer will depend on the context of the question regarding the items labeled W, X, Y, and Z. Typically, gravitational potential energy is highest at the highest point in a given system, so you would choose the highest labeled position.
**Question 29:**
The correct responses are: **increase the number of wire coils** and **increase the current.** (Both of these methods strengthen the electromagnetic field of the electromagnet.)
**Question 30:**
The correct response is: **north, south.** (Magnetic field lines run from the north pole to the south pole of a magnet.)
Feel free to ask if you have any more questions!