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The rain-soaked shoes of a person might explode if ground current from nearby lightning vaporizes the water. The sudden conversion of water to water vapor causes a dramatic expansion that can rip apart shoes. Water has density 1000 kg/m^3 and requires 333 kJ/kg to be vaporized. If horizontal current lasts 2.00 ms and encounters water with resistivity 150 Ωm, length 12.0 cm, and vertical cross-sectional area 15 x 10^-5 m2, what average current is needed to vaporize the water?
During an acceleration, the angular speed of an engine increases from 850 rpm to 2750 rpm in 4.4 s. What is the average angular acceleration of the engine
a 7-cm diameter vertical water jet is injected upwards by a nozzle at a speed of 15 ms. determine the maximum weigth of
A physicist visits a wealthy friend (marketing major) who has aswimming pool. The physicist (a theoretician) accidentally spills afew drops of suntan lotion and a thin oil film (n =1.23) spreads over the water.
290 Kg piano slides 4.0 m down a 30 degree incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. The effective coefficient of kinetic friction is .40.
An ideal, monatomic gas is allowed to expand quasi-statically and adiabatically, What is the work done by the gas and What is the change in the internal energy of the gas?
The owner of a van installs a rear-window lens that has a focal length of -0.340 m. When the owner looks out during the lens at an object located directly behind the van, the object appears to be0.240 m from the back of the van, and appears to be 0.3..
A small rubber wheel is used to drive a large pottery wheel, and they are mounted so that their circular edges touch. Calculate the angular acceleration of the pottery wheel
a 1.5-kg object is attached to an ideal massless spring with a spring constant of 20 nN/M OSCILLATES on horizontal, Find the frequency of the oscillations
Kaitlynne is using a magnifying glass (f = 0.098 m) while trying to solder a computer circuit board. find the distance between the glass and the circuit board
q1. a dockworker applies a constant horizontal force of 79.0 to a block of ice on a smooth horizontal floor. the
If the current through the inductor (L = 25.1 mH) at 351 Hz has an amplitude of 45 mA, what is the rms value of the AC voltage
A small 0.300-kg object moves on a frictionless horizontal table in a circular path of radius 2.40 m. what is the radius of the smallest possible circle on which the object can move
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