Energy
Which of the following is an example of thermal energy transfer from a higher energy system to a lower energy system?
a) Wrapping a hand around an ice cube
b) Pouring hot water into a hot cup
c) Sitting on the kitchen counter is a can of soda at room temperature
d) Placing frozen hamburger in a freezer
a) Wrapping a hand around an ice cube
A man stands on the sidewalk during a sunny day and a shadow is cast on the ground below him.
What wave behavior is represented in this scenario?
Diffraction
As you pull the sock off your pajamas, you see a spark. What do you think caused this spark?
a) movement of electrons
b) protons repelling each other
c) lack of a magnetic field
d) your hands touching the clothes
a) movement of electrons
A student applies different forces on an object at rest. In which case is the most work done?
a) 1N force moves the object through a distance of 1m
b) 5N force moves the object through a distance of 3m
c) 1N force moves the object through a distance of 2m
d) 3N force moves the object through a distance of 6m
d) 3N force moves the object through a distance of 6m
What best supports the concept of the big bang theory?
a) The planets vary in chemical composition.
b) The galaxies are moving away from each other.
c) The planets can spin on their axes.
d) The universe is composed of galaxies of different shapes and sizes.
b) The galaxies are moving away from each other.
What is the best example of a device that converts electrical energy ⇒ thermal energy?
a) A toaster
b) A flashlight
c) A clock radio
d) An electric toothbrush
a) A toaster
A pencil is placed in a beaker of water. When viewed from the side, the pencil appears to be bent.
What wave behavior is represented in this scenario?
Refraction
A student wants to construct a simple electric circuit that lights up a bulb when a current is passed through it.
Describe what all components this student would need to construct it.
1) Lightbulb
2) Battery/Energy source
3) Wires
4) Switch to Open/Close the circuit
Andre is moving the furniture in his bedroom. By placing wheels under his dresser, Andre makes his task easier by changing which type of friction?
a) rolling friction to fluid friction
b) sliding friction to fluid friction
c) sliding friction to rolling friction
d) fluid friction to static friction
c) sliding friction to rolling friction
Galaxies appear to be —
a) moving away from other galaxies
b) remaining stationary
c) converging
d) imploding on themselves
a) moving away from other galaxies
Which TWO statements correctly differentiate mechanical energy from thermal energy?
a) Mechanical energy is independent of the weight of the moving body while thermal energy is dependent on the weight of the moving body.
b) Mechanical energy is due to the motion of an object while thermal energy is due to the collision of molecules.
c) Mechanical energy is measured at the system level while thermal energy is measured at the molecular level.
d) Mechanical energy is determined by the gravitational pull of Earth while thermal energy is determined by the centripetal force of Earth.
b) Mechanical energy is due to the motion of an object while thermal energy is due to the collision of molecules.
c) Mechanical energy is measured at the system level while thermal energy is measured at the molecular level.
What electromagnetic wave carries the LEAST amount of energy?
Radio Waves
How does electricity flow in a wire?
a) Positive charges flow in one direction
b) Positive charges flow in both directions
c) Negative charges flow in one direction
d) Negative charges flow in both directions
e) Positive and Negative charges flow in one direction
f) Positive and Begative charges flow in both directions
c) Negative charges flow in one direction
All of the following are examples of acceleration EXCEPT —
a) changing directions
b) moving in a straight line at a constant speed
c) speeding up
d) slowing down
b) moving in a straight line at a constant speed
The name of the galaxy that contains the Sun and its components is —
a) Andromeda
b) the Milky Way
c) the Zodiac
d) Perseus
b) the Milky Way
A pendulum is swinging back and forth, transferring between potential and kinetic energy.
At which point of the pendulum would the point of Potential and Kinetic Energy equal each other?
a) ball is at the highest point
b) ball is in between highest and lowest point
c) ball is at the lowest point
d) ball ALMOST at the highest point
b) ball is in between highest and lowest point
A person is driving in their vehicle and sees the image of the car behind them in their side mirror.
What wave behavior is represented in this scenario?
Reflection
What 4 different factors effect electricity to flow?
Current : the net movement of electric charge in a single direction
Voltage difference: the force the causes charge to move (charge moves from high to low)
Battery: converts chemical energy to electrical energy
Resistance: the tendency of an object to resist the flow of electrons
If you are pushing a box across the floor, provide ALL of the forces in this scenario.
1) force from you onto the box
2) force from box back onto you
3) gravity pushing box to ground
4) ground pushing box up.
Which process do hydrogen atoms use to make the Sun’s energy?
a) Nuclear fusion
b) Nuclear isotope
c) Nuclear fission
d) Nuclear meltdown
a) Nuclear fusion
A pendulum is swinging back and forth, transferring between potential and kinetic energy.
At which point of the pendulum would:
1) Potential Energy = 10J; Kinetic Energy = 0J
2) Potential Energy = 0J; Kinetic Energy = 10J
PLEASE PICK TWO RESPONSES.
a) ball is at the highest point
b) ball is at the midpoint
c) ball is at the lowest point
d) ball ALMOST at the highest point
1) Potential Energy = 10J; Kinetic Energy = 0J
a) ball is at the highest point
2) Potential Energy = 0J; Kinetic Energy = 10J
c) ball is at the lowest point
Explain the difference between constructive and destructive interference.
Constructive Interference amplifies a wave.
Destructive Interference destroys a wave.
What is the difference between a parallel and a series circuit?
A parallel circuit contains MORE than one path for electricity to travel through.
A series circuit contains ONLY ONE path for electricity to travel through.
Draw a Velocity-Time graph for the motion of a car that has a non-zero, finite acceleration.
See Board (Teacher will demonstrate)
The gases that are predominant in stars are —
a) carbon and nitrogen
b) hydrogen and helium
c) carbon and methane
d) hydrogen and uranium
b) hydrogen and helium