Q. Two simple pendulums have length of 81-cm and 64-cm they are released from the same angular position at the same instant. After how much time would they both arrive at their initial position simultaneously?

Q. The initial temperature of system is 313-K and the pressure of the gas is held constant at 137-kPa.The temperature is now increased until the height of the piston rises from 23.4 cm to 26cm. What is the final temperature of gas?

## Safety standards, bags produce a maximum accelerationBoth car A and car B leave school at the same time, traveling in the same direction. Car A travels at a constant speed of 71 km/h while car B travels at a constant speed of 90 km/h. how faris car A from school 2.2 h later. |

## Find out the speed of the ball the lowest point of the circlA 0.10kg solid rubber ball is attached to the end of a 0.80 m length of light thread. The ball is swung in a vertical circle. Point p, the lowest point of the circle, is 0.20 m above the floor. |

## Conclude the ambulance speed from these observationsAfter the ambulance passes, the observed frequency of the siren is 493 Hz. Conclude the ambulance's speeds from these observations. |

## What is the emf induced in loopA convex Lens of focal length 18 cm is used as the magnifying glass. At what distance from a tiny insect should you hold this lens to get a magnification of +3.00. |

## The origin of the coordinate systemThe origin of the coordinate system and with a label at their heads. Two of these vectors are given in terms of the unit-vectors I and j as |

## What is the force that sisyphus should exertSisyphus was a character in Greek mythology that was doomed in Hades to push a boulder to the top of a steep mountain. When he reached the top, the boulder would slide back down the mountain and he would have to start all over again. |

## Probability by quantum tunnelingKeeping a constant speed of 0.6 m/s, a marble of mass 18 g rolls back & forth across a shoebox that is 14 cm high & 2 mm thick. Estimate the probability of its escaping through the wall of the box by quantum tunnelling. |

## Evaluate the result to the actual sizeLet us use the uncertainty principle to (very roughly) estimate the size of a hydro- gen atom. Picture the hydrogen atom as an electron orbiting a proton at close to the speed of light. |

## Calculate the surface tension of the gasConsider N atoms confined on a surface of area A at temperature T. The atoms form a two-dimensional (2D) gas of classical, non interacting particles. |

## Assume the net horizontal forceHow several meters away is a cliff if an echo is heard 0.587 s after the original sound? Assume that sound traveled at 343 m/s on that day. |

## What is the average force exerted on personSome people think that they can stop themselves rushing forward by putting their hands on the dashboard. Find out the mass of the object that has a weight equal to force you just calculated. |

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