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An object weighing 100N is traveling vertically upward from the ground in the absence of air resistance at a constant velocity of 5m/s. What is the power required to keep the object in motion?
A weather balloon filled with helium gas has a volume of 279 m3, What is the new volume of the balloon
A circuit has three resistors in series with a 36 volt source, The voltage across the third resistor is 20 V, Determine the three resistor values
a 5g snail crawls at 0.6mm/s between two rocks 14 cm apart. Treating this system as an infinite square well, determine the approximate quantum number
A bucket filled with water has a mass of 23 kg and is attached to a rope, which in turn, is wound around a 0.050-m radius cylinder at the top of a well. Illustrate what torque does the weight of water and bucket produce on the cylinder if the cyli..
A tight uniform string with a length of 1.80 m is tied down at both ends and placed under a tension of 100 N. What is the mass of the string
The tangential speed of a particle on a rotating wheel is 3.5m/s. how long will the particle take to make one revolution
Standing waves on a 1.7m -long string that is fixed at both ends are seen at successive frequencies of 36 Hz and 54Hz. What is the fundamental frequency
A child's toy consists of a piece of plastic attached to a spring. The spring is compressed against the floor a distance of 2.0 cm and released. If the spring constant is 85 N/m, what is the magnitude of spring force acting on the toy at the moment i..
A 50 kg pole vaulter running at 10 m/s vaults over the bar. if the vaulter's horizontal component of velocity over the bar is 1 m/s and air resistance is disregarded, how high was the jump.
A playground is on the flat roof of a city school, 5 m above the street below (see figure). The vertical wall of the building is h = 6.20m high, to form a 1.20 m high railing around the playground.
A uniform stick 1.4 m long with a total mass of 300 g is pivoted at its center. With what angular speed is the stick spinning after the collision?
A generator rotates at 87Hz in a magnetic field of 9.0×10?2T . It has 600 turns and produces an rms voltage of 180V, find the area of each turn of the coil
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