Two dragsters start from rest from the same location with the dragster a leaves 2 seconds before the dragster b. dragster a is accelerating at a constant rate of 12 m/s^2 and dragster b accelerates at 16 m/s^2 .a) at what time the b catch a? b) how far down the track does this happen? c) how fast is dragster a travelling when it gets caught? d) how fast is dragster b travelling when it catches dragster a? graph the motion of both vehicles (d vs. t, v vs. t, & a vs. t for each vehicle)

Answer asap! the weather patterns on earth are shown in this image. explain why there are convection currents; why there are hotter and colder parts of earth.

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.

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?