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A 2.5-kg cart is rolling along a frictionless, horizontaltrack towards a 1.5-kg cart that is held initially at rest. Thecarts are loaded with strong magnets that cause them to attract oneanother. Thus, the speed of each cart increases. At a certaininstant before the carts collide, the first cart's velocity is +4.5m/s, and the second cart's velocity is -2.5m/s.
(a) What is the total momentum of the system of the two carts at this instant?
(b) What was the velocity of the first cart when the second cart was still at rest?
Consider an infant who weighs 100 newtons. During each year she grows so that each dimension of her body increases by 5%. How much would she weigh then.
A laboratory technician drops a 0.0850-kg sample of unknown material, at a temperature of 100.0C, into a calorimeter. The calorimeter can, Compute the specific heat capacity of the sample
Liquid water at 25C and 1 bar fills a rigid vessel If heat is added to the water until it's temperature reaches 50C, what pressure is developed? The average value of B between 25 and 50C is 36.2x10^-5/K. The value of K at 1 bar and 50C is 4.42x10^-5/..
A semi-infinite rod carrying a uniform charge distribution of lambda coulombs per meter lies along the positive x axis from x = 0 to x = infinity. Find the components of the electric field at the point with coordinates x, y, and z = 0
Suppose a manufacturing plant has an average sound intensity level of 97.0 dB created by 25 identical machines. Find the sound intensity created by one such machine
A 4.5-kg, three legged stool supports a 68-kg person. If each leg of the stool has a cross-sectional diameter of 3.0 cm, determine the pressure exerted on the floor by each leg
A potential difference is applied between the electrodes in a gas discharge tube. In 1.7 s, 3.2 1016 electrons, What is the current in the tube
A 69-g ice cube at 0°C is heated until 60 g has become water at 100°C and 9.0 g has become steam at 100°C. How much energy was added to accomplish the transformation? =_____ J
A teeter-totter is made of a 5.400 m long plank with a mass of 58.0 kg, with a fulcrum (pivot point) located 2.900 m from the right end. If a box with a mass of 94.0 kg is placed at the extreme right end of the plank, what mass must be placed at the ..
A non-ideal battery has an EMF of 24.0V when no current is drawn and a terminal voltage of 22V when a 10.0? resistors is put in series with the battery. What is the internal resistance of the battery?
Parallel conducting tracks, separated by 2.79 cm, run north and south. There is a uniform magnetic field of 1.27 T pointing upward (out of the page). What is the direction of the magnetic force on the rod
A small sculpture made of brass (rbrass = 8470 kg/m^3) is believed to have a secret central cavity. What is the volume of the secret cavity
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