Bullet flight time and speed
A rifle is aimed horizontally at a target 45 m away. The bullet hits the target 2.5 cm below the aim point. What is the bullet's flight time and the speed as it left the barrel?
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A simple pendulum makes 121 complete oscillations in 3.0 min at a location where g = 9.80 m/s2. (a) Find the period of the pendulum.
Water discharges from a horizontal cylindrical pipe at the rate of 484 {rm cm^{3}/s}. At a point in the pipe where the radius is 2.02 {rm cm}, the absolute pressure is 1.70×105 {rm Pa}. What is the pipe's radius at a constriction if the pres
A train on a straight, level track has an initial speed of 47.0 km/h. A uniform acceleration of 1.50 m/s2 is applied while the train travels 165 m. What is the speed of the train at the end of this distance?
A 12 g bullet traveling 224 m/s penetrates a 2.0 kg block of wood and emerges going 166 m/s. If the block is stationary on a frictionless surface when hit, how fast does it move after the bullet emerges?
Despite the 1954 U.S. Supreme court decision that racially segregated school systems are inherently unequal, most schools remain segregated with virtually none or virtually all African American or Hispanic pupils.
An electron travels with speed 1.8 107 m/s between the two parallel charged plates shown in the figure below. The plates are separated by 1.0 cm and are charged by a 160 V battery. What magnetic field strength and direction will allow the electron
Why is time an important consideration in international business negotiations?
A hunter wishes to cross a river that is 1.1 km wide and flows with a speed of 5.0 km/h parallel to its banks. The hunter uses a small powerboat that moves at a maximum speed of 11 km/h with respect to the water. What is the minimum time necessary
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