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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. The carts 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?
A radioactive isotope has an activity of 8.09 mCi. After 3.05 hours the activity is 6.31 mCi. What is the half-life of the isotope?
Jupiter has a radius of 71,492km and a mass of 1.9x10^27 kg. Jupiter's moon has a mass of 9x10^22kg and orbits at a distance of 422x10^3km. find the gravitational force on the moon due to Jupiter
the bond length of hf is 91 x 10-12 m.a where does the axis of rotation intersect the molecular axis?b calculate the
a power transmission line feeds input power at 2300 v to a stepdown transformer with its primary windings having 4000
A parallel plate capacitor holds 10 uC charge on each plate when connected to a 12V battery. how much would the capacitor hold
An air track is tilted so that it makes a small angle with the horizontal. What is the magnitude of the acceleration for the air cart
Light from the bottom of a swimming pool is incident on the surface at an angle of 20°. What is the angle of refraction
Water is flowing through a pipe (area 4.2 cm2) that connects to a faucet adjusted to have an opening of 0.48 cm2. what is its speed as it leaves the faucet
In a lightning bolt, a large amount of charge flows during a time of 2.1 x 10-3 s. How much charged has flowed during the lightning bolt?
The brass bar and the aluminum bar in the drawing are each attached to an immovable wall. At what temperature will the gap be closed
The diet of a 60 kg person provides 12,000 kJ daily. Ifthis amount of energy were added to 60 kg of water, by how much would its temperature increase
A point charge q(1)= 85.9 micro C is held fixed at the origin. A second point charge, with mass m = 6.00×10?2kg and charge q(2)= -2.36 micro C , is placed at the location (0.323 m, 0).
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