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Q. A 4.5 kg fish swimming 2 m/s swallows an absent minded 1 kg fish swimming toward it at a velocity that brings both fish to a halt immediately after lunch. What is the velocity v of the smaller fish before lunch?
Q. Each of the protons in a particle beam has a kinetic energy of 3.20 10-15 J. What are the magnitude and direction of the electric field that will stop these protons in a distance of 1.00 m?
The temperature of the surface of a certain star is 7500K. Most hydrogen atoms at the surface of star are in the electronic ground state. What is the approximate fraction of hydrogen atoms that are in the first excited state (and therefore could e..
What is the net force exerted by these two charges on the third charge = 46.5 placed between and at = -1.235 ? Your answer may be positive or negative, depending on direction of the force.
What is the distance between the particles at this time? The Coulomb constant is 8.95755 × 109 N • m2/C2, the elemental charge is 1.6721 × 10-19 C, and the acceleration due to gravity is 9.8 m/s2.
What is the total mass of the reagents used in the combustion throughout the 30 days . The ball makes 17 oscillations in 16 seconds. What is it the mass of the ball.
The specific heat of ice to is 2100 and the heat of fusion for ice is . How much time passes before ice starts to melt? From the time while the heating begins, how much time does it take before the temperature begins to rise above 0.
If you weigh 690 {rm N} on the earth, what would be your weight on the surface of a neutron star that has same mass as our sun and a diameter of 21.0 {rm km}.
A 12 kg mass starts from rest and slides down an inclined plane 8.0 10-1 m long in 0.9 s. What net force is acting on the mass along the incline?
What are the first, second, and third frequencies audible from a 20cm long organ pipe when (1) only one end is open and when (2) both ends are open. The speed of sound through the air inside the organ pipe is 343 m/s. (Hint: if a harmonic does not..
What distance does baseball move before its release
What is momentum of a truck speeding down the highway at a given instant? Discuss how the momentum is changed if the truck loses some of its cargo while maintaining the same velocity.
An object with a mass of 72.0 g displaces 590.0 ml of water when it is completely immersed. What is the buoyant force on the mass?
A subway train has three cars, each weighing 1.20 x 10^5 N. The frictional force on each car is 103 N, and the first car, acting as an engine, exerts a horizontal force of 4.80 x 10^4 N on the rails.
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