1. The tolerance is -+1 in the 3rd significant digit.

A baseball leaves a pitcher's hand horizontally at a speed of 125 km/h. The distance to the batter is 18.3 m. (Ignore the effect of air resistance.) (a) How long does the ball take to travel the first half of that distance? (b) The second half? (c) How far does the ball fall freely during the first half? (d) During the second half? (a) Number i Units (b) Number Units V (c) Number i Units (d) Number UnitsLong flights at midlatitudes in the Northern Hemisphere encounter the jet stream, an eastward airflow that can affect a plane's speed relative to Earth's surface. If a pilot maintains a certain speed relative to the air (the plane's airspeed), the speed relative to the surface (the plane's ground speed) is more when the flight is in the direction of the jet stream and less when the flight is opposite the jet stream. Suppose a round-trip flight is scheduled between two cities separated by 4600 km, with the outgoing flight in the direction of the jet stream and the return flight opposite it. The airline computer advises an airspeed of 1000 km/h, for which the difference in flight times for the outgoing and return flights is 75 min. What jet-stream speed is the computer using? Number UnitsA light plane attains an airspeed of 510 km/h. The pilot sets out for a destination 790 km due north but discovers that the plane must be headed 19.0\" east of due north to y there directly. The plane arrives in 2.00 h. What were the (a) magnitude and {b} direction of the wind velocity? Give the direction as an angle relative to due west, where north of west is a positive angle, and south of west is a negative angle. (a) Number n Units v (b) Number n Units v In 2.10 h. a balloon drifts 15.2 km north, 7.78 km east. and 3.35 km upward from its release point on the ground. Find (a) the magnitude of its average velocity and {b} the angle its average velocity makes with the horizontal. (a) Number n Units v (b) Number n Units v A moderate wind accelerates a pebble over a horizontal xy plane with a constant acceleration 3 = (6.0? + 8.0?) mfsz. At time t = 0, the velocity is (5.0?) mfg. What are the {a} magnitude and (b) angle of its velocity when it has been displaced by 11.0 m parallel to the x axis? (a) Number n Units v (b) Number n Units v