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Water flows straight down from an open faucet. The cross-sectional area of the faucet is 1.7 × 10-4m2 and the speed of the water is 0.70 m/s as it leaves the faucet. Ignoring air resistance, find the cross-sectional area of the water stream at a point 0.11 m below the faucet.
A subway train has three cars, each weighing 1.20 x 105 N. The frictional force on each car is 103 N, and the first car, acting as an engine, What is the tension between the second and third cars
A uniform 1200N beam that is 3.50 m long is suspended horizontally by two vertical wires at its ends. A small but dense 550 N weight is placed on the beam 2.00m from one end.
The driver of a car sets the cruise control and ties the steering wheel so that the car travels at a uniform speed of 15m/s in a circle with a diameter of 130m. What arc length does it travel in this time
It is believed that a large electric fish known as Torpedo occidentalis uses electricity to shock its victims. What is the total amount of work done during one pulse
A military gun is mounted on a railroad car (m = 1400 kg), Find the recoil velocity of the car
What is the capacitance of a pair of circular plates with a radius of 9.0cm separated by 3.2mm of mica?
An elevator has a downward acceleration of 1 m/s2. A person, having a weight of 800 N as measured by a scale at rest on the ground, steps on a scale in the elevator. What does the scale read? A) 0 N. B) Approximately 80 N. C) Between 80 N and 800 ..
A small block of mass 20.0 grams is moving to the right on a horizontal frictionless surface with a speed of 0.500 m/s. What is the speed of the 40.0 gram block after the collision
A square loop (length along one side = 20 cm) rotates in a constant magnetic field which has a magnitude of 2.0 T. At an instant when the angle between the field and the normal to the plane of the loop is equal to 20? and increasing at the rate of 10..
A car moving at 25m/s approaches a stationary whistle that emits a 350Hz sound. The speed of sound in the air is 343m/s, what is the frequency of sound heard by the driver of the car
The leg and cast weigh 290 -N, with the center of mass as indicated by the blue arrow in the diagram. The counterbalance w2 weighs 120 N. Determine the weight w1 and angle α needed in order that there is no force exerted on the hip joint by the le..
Two identical capacitors store different amounts of energy: capacitor A stores 3.3 10-3 J, and capacitor B stores 2.5 10-4 J. Find the voltage across the plates of capacitor A
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