una ama de casa compra 2.24 litros de refresco a 5 bs y consume 15.75 litros semanalmente cuantos bs ahorrarian al mes comprando al por mayor 28 botellas en 100 bssi cada botella tiene 2.25 litros

Are aliens real? justify you’re answer.

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.

What is the final velocity of the initial velocity of 25 and -50?