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WorksheetsPhysical Science
Total questions: 25
Worksheet time: 3hrs 11mins
A child with a mass of 40 kilograms exerts a force of 20 Newtons (N) on a brick wall that cannot move. What is the force exerted by the wall on the child?
0 N
20 N
60 N
80 N
A stationary object will always accelerate when
an unbalanced force is applied
two balanced forces are applied in opposite directions
all forces are removed completely
two opposing forces are increased by equal amounts
A red block and a blue block are placed on the same surface. A force of 10 newtons (N) applied to the red block causes it to accelerate to 10 meters per second (m/s). A force of 10 N applied to the blue block causes it to accelerate to 20 m/s. Which statement must be true?
The mass of the blue block is 1/2 the mass of the red block
The density of the blue block is greater than the density of the red block
The volume of the blue block is greater than the volume of the red block
The distance traveled by the blue block is 1/2 the distance traveled by the red block
Which will travel via a compression (longitudinal) wave?
a radio wave
a sound wave
an infrared wave
an ultraviolet wave
Through which of these will sound waves travel the fastest?
oxygen gas
solid iron
liquid water
outer space
One way astronomers can find nebulae is by searching for electromagnetic radiation with wavelengths that are longer than visible light. Which type of electromagnetic radiation has a wavelength that is longer than visible light?
gamma rays
infrared light
ultraviolet light
X-rays
Which is NOT a way that waves are organized in the electromagnetic spectrum?
from lowest to highest energy
from lowest to highest frequency
from lowest to highest amplitude
from lowest to highest wavelength
What is the BEST description of sound waves?
A source vibrates up and down, causing air molecules to move up and down perpendicular to the direction the wave is transmitted
A source vibrates back and forth, causing air molecules to move back and forth in the same direction that the wave is transmitted
A source vibrates up and down and back and forth, causing air molecules to move in circular motion as the wave is transmitted
A source ejects a ring of high-velocity air molecules that travel from the source to a listener
What is the amplitude and wavelength of the wave shown?
Amplitude: 30 cm; wavelength: 60 cm
Amplitude: 30 cm; wavelength: 110 cm
Amplitude: 60 cm; wavelength 60 cm
Amplitude: 60 cm; wavelength: 110 cm
Use the following information to answer the question.
A student conducted an investigation to study motion using a remote-controlled toy car. The graph shows the average speed of the toy car during the seven different sections of the investigation. All the forces acting on the toy car are balanced when the toy car is ________________________
stopped
speeding up
going uphill
slowing down
A company developed a new brand of tire that does not wear out as quickly as other brands because the frictional force between the tire surface and road surface has been reduced. Which is the most likely disadvantage of this new brand of tire?
decreased engine power
increased traction control
decreased fuel efficiency
increased braking distance
An object's speed is a measure of
how fast the object is moving
the objects direction
the object's displacement per unit of time with direction
all of the above
Which graph represents an object moving with constant positive acceleration?
1
2
3
A fish swimming at a constant speed of 0.5 m/s suddenly notices a shark appear behind it. Five seconds later, the fish is swimming in the same direction at a speed of 2.5 m/s. What was the fish's average acceleration?
0.4 m/s2
0.6 m/s2
1.7 m/s2
2.5 m/s2
The diagram shows 5 points on a roller coaster. List the points in order from the point where the car has the greatest potential energy to the point where the car has the least potential energy
A, B, C, D, E
A, E, B, D, C
C, D, B, E, A
A, B, E, D, C
A copper rod connects two insulated beakers that contain liquids. The temperature of the liquid in Beaker A is 85 °C and the temperature in Beaker B is 15 °C. Over the next 60 seconds, what will occur?
The temperature in Beaker A will decrease and the temperature in Beaker B will stay the same.
The temperature in Beaker A will decrease and the temperature in Beaker B will increase.
Both of the temperatures will remain the same
It is impossible to tell without more information
Using the following table, determine which substance can absorb the most energy in a temperature increase of 1 K. Hint - the larger the specific heat, the more energy that substance can absorb!
liquid water
aluminum
gold
silver
A beaker of ice and water has a temperature of 0°C. A teacher heats the beaker of ice and water on a hot plate, adding thermal energy to the mixture. The temperature of the mixture does not change until all the ice melts. What is the effect of the added thermal energy while the ice is melting?
The atoms in the molecules split.
The bonds between the molecules break
The average size of the molecules increases
The average kinetic energy of the molecules decrease
The table shows how the speed of sound through the air is affected by the temperature of the air. Based on the information in the table, which is the best estimate of the speed of sound when the air temperature is 25°C?
343 m/s
344 m/s
347 m/s
349 m/s
To model a process, a teacher put some water in a beaker and put the beaker on a hot plate. She added some pepper flakes to the water. After several minutes, the pepper flakes began to move in a circular pattern from the bottom to the top of the beaker. Which process was the teacher most likely modeling?
ocean tides
convection currents
heat transfer by radiation
formation of sound waves
Which is the best example of heat being transferred mainly by radiation?
a bench getting warm when placed near a fire
warm air rising to the ceiling in a room on the top floor
hot water moving from the bottom to the top of a pot on the stove
the end of a metal spoon getting warm when placed in a cup of hot tea
A microwave can reheat 1 cup of coffee in 30 seconds. It takes a coffee-maker 10 minutes to brew 12 cups of coffee. If the coffee-maker requires 900 watts of power and the microwave requires 1200 watts of power, does it require more energy to brew 12 cups with the coffee-maker or reheat 12 cups of coffee in a microwave?
The coffee-maker requires more energy
The microwave requires more energy
The require the same amount of energy
The answer cannot be determined without more information
Resistance in electricity is caused by
internal friction
electron charge
proton charge
kinetic energy
There is a potential difference (voltage) of 12 V across a resistor with 0.25 A of current in it. The resistance of the resistor is (V=IR)
48
24
12
0.021
In the series circuit shown, what would happen if one of the light bulbs and its attached wire segment were removed?
The remaining lights would go out
The remaining lights would shine with the same brightness
The remaining lights would sine less brightly
The remaining lights would get brighter
