# AP (Advanced Placement) Physics(B-C): Questions 516 - 519 of 921

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## Question number: 516

### Question

The outside of a room temperature is , and inside of the room temperature is . Assume that the heat is transferred only through a window glass of thermal conductivity . The area of the window is and thickness of glass is . What is the heat transfer rate, through window glass?

### Choices

Choice (5) | Response | |
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a. |
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b. |
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c. |
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d. |
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e. | Question does not provide sufficient data or is vague |

## Question number: 517

» Gravitation and Circular Motion

### Question

A car of mass is traveling on a level roadway. What is the minimum coefficient of friction required to keep car on a turn with radius of ?

### Choices

Choice (5) | Response | |
---|---|---|

a. | 3.8 | |

b. | 2.4 | |

c. | 6.6 | |

d. | 0.10 | |

e. | All of the above |

## Question number: 518

» Force and Newton's Law of Motion

### Question

A net force of is applied for to an object with a mass of , will change the speed of the object:

### Choices

Choice (5) | Response | |
---|---|---|

a. | From rest to | |

b. | From to | |

c. | From to | |

d. | From to | |

e. | None of the above |

## Question number: 519

### Question

In the Bohr model of the hydrogen atom, the electron is confined to specific energy states. If is the quantum number for a particular energy level, is the electron wavelength associated with that energy level, and is the radius for the specified energy level, then which of the following equations must be correct?

### Choices

Choice (5) | Response | |
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a. |
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b. |
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c. |
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d. |
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e. | All of the above |