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William Tell must split the apple atop his son's head from a distance of 20 . When William aims directly at the apple, the arrow is horizontal. At what angle must he aim it to hit the apple if the arrow travels at a speed of 36 ?
Suppose 1.0 mol of a monatomic ideal gas initially at 10 L and 350 K is heated at constant volume to 700 K, What is the efficiency of the cycle
A girl with a mass of 60kg springs from a trampoline with an initial upward velocity of 8.0 m/s. what is the maximum height that the girl (with box) reaches
Suppose 1.0 mol of a monatomic ideal gas initially at 10 L and 307 K is heated at constant volume to 614 K, What is the efficiency of the cycle
A musician plays a string on a guitar that has a fundamental frequency of 330.0 Hz. The string is 65.2 cm long and has a mass of 0.268 g. At what speed do the waves travel on the string
Two stationary positive point charges, charge 1 of magnitude 3.50 nC and charge 2 of magnitude 1.50 nC , are separated by a distance of 31.0 cm. What is the speed (Vfinal) of the electron when it is 10.0 cm from charge 1
A fast train has a speed of 111 km/hr. Because its wheels have a limited grip to the railway, what speed must the train mantain to keep the acceleration at the limit
The water in a deep underground well is used as the cold reservoir of a Carnot heat pump that maintains the temperature of a house at 294 K. Determine the temperature of the well water
A 60 kg skier is in a tuck and moving straight down a 30 degree slope. What is the resultant of the external forces that act on the skier
A 0.410-kg ball is dropped from rest at a point 4.30 m above the floor. what is the impulse of the net force applied to the ball during the collision with the floor
A golf club makes impact with a 0.045 kg golf ball during a drive off the tee. The loft angle of the club (the angle between the club face and vertical) is 10 degrees. What is the direction of this resultant force
Which color has the highest index of refraction
The diameters of the main rotor and tail rotor of a single-engine helicopter are 7.69 m and 1.02 m, respectively. Calculate the speeds of the tips of both rotors
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