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A 250 kg flatcar 30 m long is moving with a speed of 3.0 m/s along horizontal frictionless rails. A 61 kg worker starts walking from one end of the car to the other in the direction of motion, with speed 2.0 m/s with respect to the car. In the time it takes for him to reach the other end, how far has the flat car moved?
Three uniform thin rods, each of length L = 19 cm, form an inverted U. The vertical rods each have a mass of 12 g; the horizontal rod has a mass of 44 g. What are (a) the x coordinate and (b) the y coordinate of the system's center of mass.
A spring of negligible mass has force constant = 1500 . How far must the spring be compressed for an amount 3.10 of potential energy to be stored in it? Find the maximum distance the spring will be compressed
A(n) 51.6 cm length of wire when used as a resistor has a resistance of 0.00668 ?. The ends of the wire are connected to form a circular loop, At what rate is thermal energy generated in the wire
An artillery shell is fired with an initial velocity of 300 m/s at62.0° above the horizontal. Toclear an avalanche, it explodes on a mountainside 41.5 s after firing. What are the x andy coordinates of the shell where it explodes, relative toits firi..
A car traveling east and a minivan traveling south collide in a completely inelastic collision at a perpendicular intersection. What is the direction of the velocity of the vehicles immediately after collision
Hot exhaust gases leaving an internal combustion engine at 400 C and 150kPa at a rate of 0.8 kg/s is to be used to produce saturated steam at 200 C in an insulated heat exchanger. Water enters the heat exchanger at the ambient temperature of 20 C,..
two 100m 14 gauge wires 1.63 mm diameters one of copper and one of aluminum are soldered together and the 200m wire is
the speed of an object and the direction in which it moves constitute a vector quantity known as the velocity. an
Your textbook has a mass of 2 Kg. Its dimensions are 28 cm by 23 cm by 3 cm. It is standing right side up on your book shelf resting on the smallest area. Calculate the pressure the book applies on the table in Pascals.
A man throws a baseball straight up in the air at 19.6 m/s. How many seconds does it take to reach the top
A small loop of area A=7.4 mm^2 is inside a long solenoid that has n=747 turns/cm, find the amplitude of the emf induced in the loop
Kahlinium is an H-like atom consisting of an electron and the positive Casimir particle, what would be the wavelength of the first line of the Lyman emission series for this atom
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