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A hydraulic press has a small piston of diameter =3.4 cm and the large piston of diameter=30 cm. If the force applied to the small piston (F1) is 395 N.
What is the mass of the car that can be raised at the large piston (in kg)?
The gravitational force exerted on a solid object is 113 N. when the object is suspended from a spring scale and submerged in water (Density of water=1000 kg/m3), the scale reads 50 N. The density of this object (in kg/m3) is:
Given that the potential energy of a pair of atoms in a solid is raised by 1 eV when their
separation is changed by 1Å, calculate the macroscopic elastic modulus of the lattice.
At a point 10^2m from a positive point charge q, the field strength of an electric Field is 14400vm^-1 and the potential is 144v. Find the magnitude of q and the potential at a point 2cm from the charge.
If and object of 80kg falls from a height of 90m what is the velocity the object will fall with?
If an object of 80kg falls from a height of 90m what is the KE
if an object of 80kg falls from a height of 90m what is the potential energy?
For laser action to occur, the medium used must have at least three energy levels. What must be the nature of each of these levels? Why is three the minimum number?
Find the radius and speed of an electron in the ground state of doubly ionized lithium and compare them with the radius and speed of the electron in the ground state of the hydrogen atom.
(Li++ has a nuclear charge of 3e.)
An antiproton has the mass of a proton but a charge of -e. If a proton and an antiproton orbited each other, how far apart would they be in the ground state of such a system? Why might you think such a system could not occur?
