S8P1
How many protons are in Se-80?
34
At what point on the pendulum is kinetic energy the greatest?
What is Newton’s 2nd Law of Motion known as?
A: Law of Inertia
B: Law of Acceleration
C: Law of Force
D: Law of Action and Reaction
B: Law of Acceleration
A crowd doing the wave in a stadium represents which type of mechanical wave?
Transverse
When two magnets move away from each other, what happens to the strength of the magnetic field?
A: It remains the same
B: It decreases
C: It increases
B: It decreases
What is different about the particles in the solid, liquid, and gaseous states of water?
A: The net electric charge of the molecules
B: The size of the molecules
C: The average speed of the molecules
D: The mass of the molecules
C: The average speed of the molecules
Which of the following is NOT a form of stored chemical energy?
A: A battery in a toy
B: The nucleus of a carbon atom
C: Fossil fuels
D: A plate of rice
B: The nucleus of a carbon atom
How is an object’s mass related to the force needed to accelerate the object?
A: The greater the mass, the greater the force needed.
B: Mass and force have no relationship.
C: Mass determines the direction of the force.
D: The greater the mass, the lesser the force needed.
A. The greater the mass, the greater the force needed.
A bell and a siren are producing sound waves. The sound wave produced by the bell have a lower frequency than those produced by the siren. Which must be true?
A: The sound wave produced by the bell has a longer wavelength
B: The sound wave produced by the bell has a higher amplitude
C: The sound wave produced by the bell has a shorter wavelength
D: The sound wave produced by the bell has the same amplitude as the siren.
A: The sound wave produced by the bell has a longer wavelength
Two balloons are rubbed with a wool cloth. When the balloons are held near one another, they move away from each other. Why?
They have opposite charges and repel each other.
A sample of aluminum has a volume of 3.0cm3 and a mass of 8.1g. What is density?
A: 2.0 g/cm3
B: 2.7 g/cm3
C: 2.7 cm3
D: 2.8 g/cm3
B: 2.7 g/cm3
Which is an example of heat transfer through radiation?
A: Light from a fire shines on objects
B: A fire heats air around it
C: Fire consumes oxygen in air to produce smoke
D: A fire heats a pot
A: Light from a fire shines on objects
What is the acceleration of a car that is travels from 100m/s to 5 m/s in 8 seconds?
A: -1.18 m/s2
B: 11.88 m/s2
C: 12 m/s2
D: -11.88 m/s2
D: -11.88m/s2
The color black means what is happening to all colors?
A: They are being absorbed
B: They are being reflected
C: They are being refracted
D: They are being diffracted
A: They are being absorbed
Which material could be used for the core of an electromagnet?
A: A wooden rod
B: A plastic rod
C: A neon rod
D: A nickel rod
D: A nickel rod
An unknown substance is provided in a science lab. It consists of different particles that are different shapes and sizes and unevenly distributed. What type of substance is this?
A heterogeneous mixture
Four objects on a shelf are 1.5 m above the ground: A 100 gram picture frame, a 600 gram vase, a 350 gram trophy, and 225 gram book. Which object has the most potential energy?
The vase
What does the following graph show? (Look at board for picture).
A: Instantaneous speed
B: Constant Speed
C: Speed
D: Average Speed
B: Constant speed
The sound we hear when a bullet is shot is known as what phenomenon
A sonic boom
An engineer built a device. The main part of the device is a bike attached by wires to a light bulb. When the engineer pedals the bike, the light bulb lights up. How can this device be best classified?
A: An electromagnet
B: A motor
C: A car
D: A generator
D: A generator
The following chemical reaction occurs: CH4 + 2O2 à CO2 + H2O. What is the mass of oxygen based on the following info:
16g +? ---> 44g + 36g
A: 16g
B: 44g
C: 36g
D: 64g
D: 64g
How is convection different from conduction?
A: Convection can transfer heat through a vacuum, but conduction cannot.
B: Convection takes place only in solids, but conduction transfers heat in liquids and gases as well.
C: Conduction can transfer heat through a vacuum, but convection cannot.
D: Convection takes place only in liquids and gases, but conduction transfers heat in solids as well.
D: Convection takes place only in liquids and gases, but conduction transfers heat in solids as well.
When a rocket attempts to launch, its engine exerts a force downward. The rocket will not launch until the force of the engine is greater than the weight of the rocket. Why?
A: The force must be equal and balanced for the rocket to move
B: The rocket must move at a constant velocity to take off
C: The force of the engine must be greater than the force of gravity to produce a net force forward.
D: The force of the engine must be twice as strong as the force of gravity for the rocket to move
C: The force of the engine must be greater than the force of gravity to produce a net force forward.
What type of mirror is a convex mirror, and what type of images are formed?
A: Diverging. Forms real and inverted images
B: Diverging. Forms virtual and upright images
C: Converging. Forms real and inverted images
D: Converging. Forms virtual and upright images
C: Converging. Forms real and inverted images
A worker needs to use the oven at his job for 5 hours to bake two cakes. The oven uses 5000 W of power. How much electrical energy is used during 5 hours? If it costs $0.20kWh, how much will it cost the worker to use the oven?
A: 25000 kWh, $5.00
B: 25 kWh, $5.00
C: 25000 kWh, $5,000
D: 25 kWh, $25.00
B: 25 kWh, $5.00