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Physics

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A sample contains 10 g of a radioactive isotope. How much radioactive isotope will remain in the sample after 2 half-lives?

A. 7.5 g

B. 5.0 g

C. 2.5 g

D. 10.0 g

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Physics

Zaniyah

A plane flies along a straight line path after taking off, and it ends up 210 km farther east and 90.0 km farther north, relative to where it started. What is the plane's displacement?

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Physics

Justine Garcia

Compare exothermic reactions and endothermic reactions. Give at least one similarity and one difference.

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Physics

Matilda Wilkerson

A solid cylinder with a radius of 73.3 cm and a mass of 2.33 kg accelerates

uniformly from rest in 4.13 seconds while experiencing 6.71 rotations.

Solve for the (a) final angular velocity.

- Solve for the (b) the torque required to produce the angular acceleration.

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Physics

Gina Nguyen

In the early stages of its formation, earth became hot enough that some of its solid materials turned to liquid. Which of these factors did not directly contribute to earths high internal temperatures

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Physics

Josie

How do you find Rtotal in a series without knowing the voltage?

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Physics

Sweet Tea

April swims 50 m north and then turns and swims 20 m back to the south.

What is her velocity if it takes her 60 seconds?

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Physics

Leyla Garza

All the colors of visible light can combine to form white light.

a. True

b. False

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Physics

Creedence

If the results of a study do not support a hypothesis, it means that the experiment failed.

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Physics

Harley Douglas

How does a rubber band obey the law of conservation of energy?

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Physics

Adolfo Parks

Shane observes that an upward force pushes him up when he sits on a chair. Based on his observation which statement is correct

Friction can act at a distance.

Normal force can act at a distance.

The chair applies a non-contact force called friction.

The chair applies a contact force called normal force.

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Physics

Grant Fritz

In atomic mass units, what is the mass of an electron?

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Physics

Leland Gillespie

What affects how an object falls toward earth?

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Physics

Dereon Rasmussen

Calculate the amount work done if you use a 100n force to push a 5g box 5m across the kitchen floor

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Physics

Samara Conner

Bonnie and Clyde are sliding a 315 kg bank safe across the floor to their getaway car. The safe slides with a constant speed if Clyde pushes from behind with 381 N of force while Bonnie pulls forward on a rope with 363 N of force.

What is the safe's coefficient of kinetic friction on the bank floor?

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