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Q. A particle is confined in a cubic box, each side measures 1Angstrom. The mass of the particle is 10-30kg. The potential energy inside the box is zero, outside the box it is infinite.
Use the Heisenberg uncertainty principle to find the lowest possible momentum for the particle and calculate the lowest possible energy for this particle in eV.
What is de Broglie's wavelength corresponding to the lowest possible momentum?
Q. suppose that we could use the energy released when 5g of antimatter annihilates 5g of matter to lift a mass 3 km from the Earth's surface. how much mass could we lift? answer in unites of kg.
What is wind velocity
our little sister builds 2 tree houses and stretches a rope between them for sending messages to other tree house. She hangs a mass of 1.4kg on one end of the rope that passes over the pulley.
500 J of work are completed to compress the gas while, in the same process, 1400 J of heat energy are transferred from the gas to the environment. Afterward, what is the rms speed of the molecules.
Starting from rest, a 40 kg body reaches a speed of 8.0m/s in 2s. Calculate the force acting on the body?
A proton is initially at rest at a point where the potential is 515V. Sometime later the proton is at a point where the potential is 190V. If no force other than the electrostatic force acts on the proton, what is its final kinetic energy.
What will transform in terms of the observable properties of the black hole as this process continues
What is momentum of the system immediately after the pack is thrown?
The gravitational force between two masses M and m separated by a distance r is 40 N. What is the new force when this distance is halved?
Find out the lengths of acceleration and deceleration phases
Calculate the rates of solar heating
The bowling ball has a diameter of 20.6 {rm cm}, and the angle the stick makes with the horizontal is 30.0 {rm ^circ}. You may suppose there is no friction between the stick and the bowling ball, though friction with the floor must be taken into acco..
How much work should Denise do to drag her basket of laundry of mass 6.0 kg a distance of 3.0 m along a floor, if the force she exerts is a constant 50.0 N at an angle of 70.0° with the horizontal.
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