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An arrow is shot off the top of a bridge of unknown height. The speed of the arrow at launch is known to be 30.0 m/s. The launch is at an angle of 35.0 degrees aboe horizontal. The arrow strikes the ground exactly 120 meters from the base of the bridge. How tall is the bridge? (assume level ground, neglect air resistance).
A stationary whistle emits a sound of 188Hz. If passengers in a car hear the whistle with a frequency of 198 Hz, how fast was the car moving? Make use of 340 m/s for the sound velocity.
Light from a He-Ne laser (= 632.8) strikes a pair of slits at normal incidence, forming a double-slit interference pattern on a screen located 1.10 from the slits. The figure shows the interference pattern observed on the screen.
Two thermal reservoirs are connected by a solid copper bar. The bar is 3 m long, and the temperatures of the reservoirs are 63.0°C and 32.0°C. What is the rate of heat flow through the bar
What is the electric potential energy of the system? (Take as zero the potential energy of the three charges when they are infinitely far apart.)" Use = 8.85 10 12 for the permittivity of free space.
An airplane can be made invisible to radar by coating the plane with a thin layer of an antireflective material. How many dark fringes are observed when 600 nm light illuminates the slides from directly above
Suppose 1.0 mol of a monatomic ideal gas initially at 10 L and 337 K is heated at constant volume to 674 K, What is the net work done by the gas during the cycle
Positive charges with magnitudes 3.50 mC and 6.75mC are located at the origin and at the point (10,0) metters on the x axis, respectively. What are the strength and direction of the field they generate at the point (0,10) on the y axis?
What are angles of refraction
A 2.96 mA beam of electrons moving at 2.09x106 m/s enters a region with a sharply defined boundary, Find the transmitted and reflected currents
A rifle with a barrel length of 59 cm fires a 8 g bullet with a horizontal speed of 350 m/s, What resistive force (assumed to be constant) does the wood exert on the bullet
The amass of the aluminum cylinder is (207.8±0.1)g. Once the cylinder is turned through the numbers of turns as described in Problem 1, Determine the amount of heat that entered the cylinder
A major-league catcher gloves a 93 mi/h pitch and brings it to rest in 0.14m. If the force exerted by catcher is 803 N, what is the mass of the ball.
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