Monday May 6 Milestone Practice

The force of attraction for gravity depends on the object's masses and distance. The force of attraction or repulsion for charges depends on the strength of the charge, type of charge, and distance. Which is the correct explanation of the picture?

• Set A has a larger force and it is attractive
• Set A has a larger force which is repulsive
• Set B has a larger force that is attractive
• Set B has a larger force that is repulsive

Which wave behavior is used by noise cancelling headphones?

• refraction
• constructive interference
• destructive interference
• diffraction
• Option 2

The student uses the headphones where the noise is louder and has a higher pitch. How will the noise cancelling wave change for the headphones change for the headphones to remain effective. Think - Amplitude is what part of a wave? Frequency is what part of the wave?

• The waves velocity and wavelength would need to increase.
• The wave's velocity and wavelength would need to decrease.
• The wave's frequency and amplitude would need to decrease.
• The wave's frequency and amplitude would need to increase.

If you know the frequency (how many steps per unit of time) what other information do you need to know to determine the wavelengths (length of each step) produced by the elepants?

• The speed of the waves
• The period of the waves
• The energy the sound wave carries
• The distance the sound waves travel

You can easily tell if the electricity is going through and light is coming from the bulb. We assume the battery is charged. Which of the following explains whether there is a magnetic field at point X?

• There is no magnetic field at point X because copper wires are not magnets.
• There is no magnetic field at point X because it is too far way from the battery.
• There is a magnetic field at point X because the current flows through the wire.
• There is a magnetic field at point X because the light has magnetic properties

Two rubber balls roll along a straight track toward each other at the same speed. The balls are the same size but different masses. The two balls collide. We can assume there are no outside forces since the balls are rubber (elastic collision) and there are no other outside forces mentioned. Which of the following describes the momentum of the rubber balls comparing before and after the collision?

• the total momentum stays the same because the total momentum is conserved
• the total momentum is doubled because each ball gains the other ball's momentum
• the total momentum is reduced by half because each ball loses half of its momentum
• the total momentum becomes zero, because the momentum of each ball is equal and opposite.

At which point did container 1 and container 2 first reach thermal equilibrium?

• W
• X
• Y
• Z

A class connected two insulated sealed containers with a u shaped piece of metal. Before the investigation, the class predicted the direction of thermal energy would transfer from container 1 to container 2. Which of the following observations best supports the students prediction?

• The containers are good thermal insulators.
• The water in container 1 is at a higher temperature than the water in container 2.
• The water in container 1 is in thermal contact with the water in container 2.
• There is a U shaped piece of metal from container 1 to container 2

Momentum before collision = momentum after the collision absent outside forces. Momentum = Mass x Velocity Since mass is the same we can say Total speed x .54kg before collision = Total speed x .54 after the collision. Which picture is correct.

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Sound is the energy passing from particle to particle. The closer the particles, the faster the sound.. Below the answer choices is a .gif visual aid - please look at it. Three mediums were used to measure the speed of sound - air (gas), silver (a solid), and water ( a liquid). Which is the correct label for X, Y, and Z

• X water Y silver Z air
• X silver Y water Z air
• X air Y silver Z water
• X water Y air Z silver
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