A vehicle starts from rest with a uniform acceleration until a velocity of 48 km/h is reached. It then moves with a constant speed until it decelerates and finally stops 600 m from the starting point. The whole journey takes 1 minute, and the magnitude of the deceleration is twice that of the acceleration. Calculate: The time (in seconds) it takes the vehicle to reach a velocity of 48 km/h.
The time (in seconds) the vehicle moves with a constant speed.
The time (in seconds) it takes the vehicle to decelerate and stop.
The acceleration of the vehicle (give your answer in m/s2).
The distance the vehicle travels with constant velocity (give your answer in m)/

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.

Determine the net charge of the predominant form of arg at (a) ph 1.0, (b) ph 5.0, (c) ph 10.5, and (d) ph 13.5

Work requires a force which causes: potential energy or motion