a rocket is launched straight up with a constant acceleration. four seconds after liftoff a bolt falls of the side of the rtocket the bolt hits the grouond 6 seconds later what was the rockets

Scientists use laser range-finding to measure the distance to the moon with great accuracy. a brief laser pulse is fired at the moon, then the time interval is measured until the "echo" is seen by a telescope. a laser beam spreads out as it travels because it diffracts through a circular exit as it leaves the laser. in order for the reflected light to be bright enough to detect, the laser spot on the moon must be no more than 1.0 km in diameter. staying within this diameter is accomplished by using a special large-diameter laser. part a if λ = 540nm , what is the minimum diameter of the circular opening from which the laser beam emerges? the earth-moon distance is 384,000 km. express your answer to two significant figures and include the appropriate units.

Blank liquids and gases exert a buoyant force on objects placed in them

One form of energy can be another type of energy. a. created to form b. transformed into c. destroyed and then created to form