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a cube of wood floating in water supports a 200g mass at the centre of its top face. when the mass is removed, the cube rises by 2cm. determine the volume of the cube?
an electron and a proton are each accelerated through a potential difference pf 10.0 million volts. Find the momentum ( in MeV/c) and the kinetic Energy ( in MeV) of each and compare with the results of using the classical Formular.
A car with a mass of 950kg is travelling east when it collides with a truck of mass 1900kg that is travelling south. What is the speed of the truck before the collision
A 0.527-kg mass is attached to a horizontal spring with k = 108 N/m. The mass slides across a frictionless surface. Find the mechanical energy of the system.
A freshly prepared sample of a certain radioactive isotope has an activity of 11.2 mCi. After 4.40 h, its activity is 8.00 mCi. Find the decay constant
You hold a ruler that has a charge on its tip 6 cm above a small piece of tissue paper to see if it can be picked up. find the minimum charge required to pick up the tissue paper
johnny throws a shotput at an angle of 45.deg and it travels a horizontal distance of 30. meters. if he releases the
A dentist uses a small mirror of radius 45 mm to locate a cavity in a patient's tooth. If the mirror is concave and is held 14 mm from the tooth, what is the magnification of the resulting image.
A missile is fired from a launcher with an initial velocity of 250 m/s at a target located 500 m above the launcher, determine The possible firing angles required to hit the target
q1. sunlight shining in during the daytime is absorbed by the floor interior walls and objects in the room raising
An event occurs at x′ =60m, t′ =8×10-8 sec in a frame S′ (with y′ =0, z′ = 0). The frame S′ has a speed of 3c/5 in the x direction with respect to frame S. The origins of S and S′ coincide at t = 0, t′ = 0. What are the spacetime coordinates of th..
At a soft drink bottling plant, a horizontal section of pipe carrying citric acid in liquid form goes from a cross-sectional area of 8.00 cm2, determine the liquid flow speed and the liquid pressure
A photon has an energy E and wavelength (lamda) before scattering from a free-rest electron. FInd the initial wavelength and the initial energy of photon
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