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Q1. A man pushes the lawn mower on a level lawn with a force of 240 N. If 40 percent of this force is directed downward, how much force is directed horizontally?
Q2. Two conducting wires a and b of circular cross-section have the same length and radii but are made from different metals. The resistivity of wire a is twice that of wire b. When these two wires are connected in equivalent to the same battery, describe the reasoning of the steps that allow you to find out which of these wires will consume the greater amount of power by warming up and dissipating this energy as heat.
Calculate the energy associated with the magnetic field of a 191 turn solenoid in which a current of 2.44. A produces a magnetic flux of 3.74 x 10-4 T • m2 in each turn.
q1. sunlight enters a room at an angle of 31 above the horizontal and reflects from a small mirror lying flat on the
One mole of an ideal gas does 2 600 J of work on its surroundings as it expands isothermally to a final pressure of 1.00 atm, Determine the initial volume of the gas
In the Bohr model of the hydrogen atom, an electron in the 7th excited state moves at a speed of 4.47 104 m/s in a circular path having a radius of 2.59 10-9 m
Calculate the kinetic energy a proton gains if it is accelerated, throug a potential difference of 1.00 V
A block of wood has a density of 0.55g/cm^3 and mass of 2,500 g. it floats in a container of oil (the oil%u2019s density is 0.85 g/cm^3). What volume of oil does the wood displace
rail car that weighs 43 N is accelerated at 8.9 m/s/s for 4.5 seconds. How much work is done on the rail car
Assume that water flowing through a pipe with a circular cross section flows most rapidly at the center of the pipe and least rapidly near the pipe walls. find the speed of the water at the center of the pipe
A cylinder which is in a horizontal position contains an unknown noble gas at 4.63 × 104 Pa and is sealed with a massless piston. calculate the change in internal energy of the system
A 100 m long solenoid has a radius of 0.050 m and 1.5 x 10^4 turns. Determine the self-induced emf in the solenoid due to the changing environment
A wire with mass 38.0g is stretched so that its ends are tied down at points a distance 78.0cmapart. What is the speed of propagation of transverse waves in the wire
A small rigid object carries positive and negative 4.00 nC charges. It is oriented so that the positive charge has coordinates, Find the electric dipole moment of the object
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