You're an optometrist, mounting a projector at the back of your 3.8m -long exam room, 2.6m above the floor. It shines an eye-test pattern on the opposite wall. Patients will sit with their eyes 2.8m from the wall and 1.5m above the floor to view the pattern.

At what height should you center the pattern on the wall?

## Find the centripetal acceleration of the charged particlesCharged particles round a 1.7 km radius circular particle accelerator at nearly the speed of light. Find the centripetal acceleration of the charged particles |

## Find the number of revolutions she makes while on way downAt the local swimming hole, a favorite trick is to run horizontally off a cliff that is 6.35 m above the water. find the number of revolutions she makes while on the way down |

## Find the rms value of the electric field of this radiationThe microwave radiation left over from the Big Bang explosion of the universe has an average energy density of 3.89 × 10-14 J/m3 |

## Locate the final image relative to the lens on the rightTwo converging lenses (f1 = 9.00 cm and f2 = 6.00 cm) are separated by 18.0 cm. The lens on the left has the longer focal length, Locate the final image relative to the lens on the right |

## How much does the block of wood weighA solid block of wood is a cube whose volume is 1x10^-3m^3. When dropped into a swimming pool, How much does the block of wood weigh |

## Why is it sometimes better to use a small telescopeWhy is it sometimes better to use a small telescope in orbit around the Earth than it is to use a large telescope on a mountaintop? |

## Find the current in the primary coilthe 150 turn primary coil of a transformer is connected to a 120 V AC source. Find the current in the primary coil |

## How far is the tortoise from the finish lineA hare and a tortoise compete in a race over a straight course 1.95 km long. The tortoise crawls at a speed of 0.100 m/s toward the finish line. How far is the tortoise from the finish line when the hare resumes the race |

## Find the magnitude of the linear acceleration of two blocksTwo identical 1.3-kg blocks are connected by a massless string over a frictionless pulley of radius R = 15.000 cm and rotational inertia I = 0.004 kg m2, find the magnitude of the linear acceleration of the two blocks |

## Compute how far is the object from the mirrorThe real image of an object is located 45.0cm away from a concave mirror, which has a focal length of 10.0cm. How far is the object from the mirror |

## Find the approximate electric field from the surface of rodA 100.0 m long rod with a diameter of 3.0 mm has a charge of 1032 C. What is the approximate electric field 3 mm from the surface of the rod |

## What is the speed of the helium nucleusA neutron collides elastically with a helium nucleus (at rest initially) whose mass is four times that of the neutron. What is the speed of the helium nucleus after the collision |

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