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Shelby Jefferson
Which sampling method subdivides the population into categories sharing similar characteristics and then selects a sample from each subdivision?

Choose the correct answer below.

a. Stratified

b. Convenience

c. Systematic

d. Cluster
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Fernanda Wright
A person opens a 2 - liter bottle of cola at a picnic. If the cap is left off the bottle, the cola will become 'flat' or lose its carbonation. Which statement below best summarizes why the cap must be kept tightly in place if the cola is to remain fresh?
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Joanna Robinson
A 1,800kg car has a momentum of - 50,400kgm/s. What is the velocity of the car?
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Amiah
A machine with a mechanical advantage of 2.5 requires an input force of 120 newtons. What output force is produced by this machine?
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Tristin Mccarthy
Which of the phases below are able to be compressed? A) Liquid only. B) Liquid and Gas. C) Solid only. D) Gas only
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Pop Tart
How would you select a sicience fair project
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Terry
Which statement accurately describes the difference between mass and weight?

O Mass and weight change based on location.

Mass remains the same while weight changes based on location.

O Weight remains the same while mass changes based on location.
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Guest
A parallel circuit contains four branches. One branch has a current flow

of 0.8 A, another has a current flow of 1.2 A, the third has a current

flow of 0.25 A, and the fourth has a current flow of 1.5 A. What is the

total current flow in the circuit?
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Reese Archer
What happens to the motion of an object when the forces acting on it are balanced? A. The motion changes. B. The motion does not change. C. The motion speeds up. D. The motion slows down.
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Harper Kim
An object with a temperature of 0 Kelvin would not emit radiation.

a. True

b. False
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Carlee Rush
When a bar magnet is broken into two pieces each piece has a north and south pole because

a

the magnetic fields reversed

b

every magnet is made of many aligned smaller magnets

с

bar magnets are permanent magnets

d

the magnetic poles have been isolated
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Macey Mckay
A box is being pulled to the right. What is the direction of the gravitational force?
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Quintin Powell
An electron, starting from rest and moving with a constant acceleration, travels 2.0 cm in 5.0 ms. What is the magnitude of this acceleration?
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Vance Harmon
Which equation correctly relates kinetic energy, mass, and velocity?

Which of the following is an example of kinetic energy?

a boy resting on a park bench

a book sitting on a shelf

a rubber band stretched as far as it can go

a swing moving back and forth
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Shayna Simmons
2. An 800-g bird has 47.0 J of gravitational potential

energy when it is perched high up in a tree.

Calculate the bird's vertical height from the ground.
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