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Two identical boxcars (m = 15730 kg) are traveling along the same track but in opposite directions. Both boxcars have a speed of 4 m/s. If the cars collide and couple together, what will be the final speed of the pair?
q1. at an amusement park you went on a ride that malfunctioned. what was the angular displacement of the ride after
Assuming that the bond energy holding together a water molecule is typical, use table below to estimate how various molecular bonds might be broken with this energy.
You have a 1.3m long copper wire. You want to make an N-turn current loop that generates a 1.0mT magnetic field at the center when the current is 1.2A. What will be the diameter of your coil
Assume that a 16 volt energy source is in a circuit that has a resistance of 10 ohms. Determine the current and power
A pencil (mass 5.8g and length 8.3cm) is at first balanced so that it is sitting vertically on a flat table. If the pencil then falls, find its angular velocity just before it strikes the tabletop. Assume that the mass of the pencil is distributed un..
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 heat pump extracts 7.0*10^6 J heat per hour from a well at 280K and delivers its output heat into a house at 320K. what minimum work must be supplied to the heat pump per hour
A highly polished silver hemisphere of radius R rests with its base on a level table. What must be the diameter of the beam if light from the outer edges of the beam is reflected horizontally
A very early, simple satellite consisted of an inflated spherical aluminum balloon 30 m in diameter and of mass 20 kg. What is the gravitational force on the meteor from the satellite at the closest approach
A solid cylinder is mounted above the ground with its axis of rotation oriented horizontally. What is the angular acceleration of the cylinder
A 1200 kg car pushes a 2200 kg truck that has a dead battery . When the driver stes on he accelerator, What is the magnitude of the force of the car on the truck
While snorkeling you hear a dolphin's sound as it approaches at 5.00 m/s. what is the actual frequency being emitted
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