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From the top of a cliff 80 meters high, a ball of mass 0.4 kilogram is launched horizontally with a velocity of 30 meters per second at time t=0. The potential energy of the ball is zero at the bottom of the cliff. Use g=0 meters per second squared. Calculate the potential, kinetic, and total energies of the ball at time t=0
The nucleus of an atom consists of protons and neutrons (no electrons). A nucleus of a carbon-12 isotope contains six protons and six neutrons.
A box of mass 19.0 kg is sitting on a flat horizontal floor with a coefficient of static friction of 0.30 between the box and the floor. What minimum tension in the string is required for the box to just start moving
Find the distance from the positive plate
compute the magnitude of the magnetic force exerted on it.
question1suppose that for some process the cross section for absorption of a certain wavelength photon is 10-16 cm2 and
A 330-power compound microscope has a 4.9mm focal-length objective lens. If the distance from eyepiece to objective is 12cm, what should be the focal length of the eyepiece
A group of astronomers have observed a star "S2" in a 15.2-year orbit around the center of the galaxy. They measured the period of revolution T = 15.2 years, Calculate the mass of the compact object about which S2 is revolving
If the coefficient of friction between the ladder and ground is 0.42, illustrate what is the mass of the heaviest person who can safely ascend to the top of the ladder?
When attaching a mass of 50g on a force table at 90 degrees and an unknown mass at 0 degrees, you get an equilibrant mass to have 230 g positioned at 225 degrees
Consider a gas of fermions at temperature T=0 in 3D space with dispersion law E(p) = v lpl^3 where v is a constant. calculate the Fermi energy and the ground energy
A cyclist starts from rest and pedals such that the wheels of his bike have a constant angular acceleration. What is the angular acceleration of the wheels
The mass of a robot is 5220 kg. This robot weighs 2650 N more on planet A than it does on planet B. Both planets have the same radius of 2.26 × 107 m
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