# AP (Advanced Placement) Physics(B-C): Questions 453 - 457 of 921

Access detailed explanations (illustrated with images and videos) to **921** questions. Access all new questions- tracking exam pattern and syllabus changes. View the complete topic-wise distribution of questions. *Unlimited Access for Unlimited Time*!

View Sample Explanation or View Features.

Rs. 450.00 or

How to register?

## Question number: 453

### Question

If the half – life of a radioactive isotope is , then what is the decay constant of it?

### Choices

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

a. |
| |

b. |
| |

c. |
| |

d. |
| |

e. | Question does not provide sufficient data or is vague |

## Question number: 454

### Question

Two particles of charges and , are separated to . How much electrostatic force is acting on particle of charge due to particle of charge ?

### Choices

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

a. |
| |

b. |
| |

c. |
| |

d. |
| |

e. | Question does not provide sufficient data or is vague |

## Question number: 455

### Question

A tall tank has a bottom area of . It is filled to a depth of with fresh water. What is the fluid force on bottom of the tank?

### Choices

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

a. |
| |

b. |
| |

c. |
| |

d. |
| |

e. | All of the above |

## Question number: 456

### Question

A mass of is hung from a metallic wire. The elastic limit of the wire is and Young’s modulus of the wire is . What should be the minimum radius of the wire, so that elastic limit is not exceeded?

### Choices

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

a. |
| |

b. |
| |

c. |
| |

d. |
| |

e. | None of the above |

## Question number: 457

### Question

If the Young’s modulus of a wire is , then how much force is applied to stretch a wire in cross section to of its length?

### Choices

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

a. |
| |

b. |
| |

c. |
| |

d. |
| |

e. | None of the above |