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Gavyn Humphrey
Select all of the answers that apply.

Which statements are true regarding the scientific evidence supporting the big bang theory?

Researchers found cosmic microwave background radiation, which is a heat imprint left over from the big bang.

Quasars have been observed exploding and expanding from a single, hot, dense singularity.

A primordial form of helium gas was found by the Endeavor space shuttle.

A redshift of light emitted by stars and galaxies indicates the universe is expanding.

Redshift and blueshift of light emitted by stars and galaxies indicate that universe is expanding and contracting.
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Jazlyn Velasquez
How are magnetic poles and electrical charges similar? A. Their same forces repel each other, and their opposite forces attract each other. B. Their same forces attract each other, and their opposite forces repel each other. C. Magnetic force is equal to electric force. D. Only electric charges are moving. E. Magnetic poles can switch positions.
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Liberty Powell
As part of his meal, a workman has a cup containing a hot drink.

In order to keep the drink hot whilst he eats the rest of his meal, he covers the cup, as shown in

the figure.

Which sources of energy loss does this action reduce? Tick two boxes.

convection from the surface of the liquid

evaporation from the surface of the liquid

conduction through the cup

radiation from the surface of the cup
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PhysicsPhysics
Keith Joyce
When energy is transformed, the amount of usable energy?
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PhysicsPhysics
Frankie Whitehead
If an object weighs 39.2 n on earth, what is its mass
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Bradyn Houston
What happens when pressure is applied to a solid.
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Guest
A box of mass 1 kg is hung from a spring scale. The reading on the spring scale is approximately 10N. What would be the reading on the spring scale if a box of mass 5 kg is hung from it? (Assume acceleration due to gravity to be 10 m/s2.)

A) 5 N

B) 10 N

C) 50 N

D) 500 N
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Elliot Griffith
under what conditions could the angular momentum of the closed system of isolared student, stool, and masses change
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Brady
Which of the following statements about psychodynamic perspective is not true?
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Sonia Gould
Explain how to run off water could pollute streams and rivers
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Cristofer Jensen
Explain teen pregnancy from a sociological perspective.
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Amaya Novak
Imagine you are on a roller coaster, riding a skateboard, or running across the ball field. What are some clues that you are moving?
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Pirate
In vacuum, red light travels at a greater speed than blue light does.

a. true

b. false?
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Bria Williamson
When the sun is directly overhead, a hawk dives toward the ground with a constant velocity of 5.35 m/s at 52.0° below the horizontal. Calculate the speed of its shadow on the level ground. M/s?
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Darius Stone
How do the tension of the cord and the force of gravity affect a pendulum?

A. They are the competing forces that act on a pendulum as it swings.

B. They are the two factors that affect the period of a pendulum.

C. They determine what type of pendulum it will be.

D. They have no effect on a pendulum.
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