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The rear window of a van is coated with a layer of ice at 0°C. The density of ice is 917 kg/m3, and the latent heat of fusion of water is 3.35 x 105 J/kg. The driver of the van turns on the rear-window defroster, which operates at 12 V and 18 A. The defroster directly heats an area of 0.35 m2 of the rear window. What is the maximum thickness of ice above this area that the defroster can melt in 3.2 minutes?
An unknown metal alloy is being tested to discover its thermal properties to see if it is suitable for use as a component in an aircraft wing. The alloy is formed into a bar measuring 1 meter in length, and is then heated from its starting temp. o..
Find out the magnitude of the friction force acting on the case. Laser light with a wavelength = 680 illuminates a pair of slits at normal incidence. What slit separation would produce first-order maxima at angles of 40 from the incident direction.
A machine shop grinding wheel accelerates from rest with a constant angular acceleration of 2.8rad/s2 for 7.6s, Find the total number of revolutions turned
A small block with a mass of 0.120kg is attached to a cord passing through a hole in a frictionless, horizontal surface. The block is originally revolving at a distance of 0.50 m from the hole with a speed of 0.70m/s. The cord is then pulled from ..
A 9kg block is connected by a string over a light pulley to a 5kg block that is sliding over a flat table (i.e. the 9kg is pulling the 5kg off the table). If Co-efficient of kinetic friction is 0.200, find the tension in the string.
A cylinder which is in a horizontal position contains an unknown noble gas at 5.26 × 104 Pa and is sealed with a massless piston. calculate the change in internal energy of the system
An electron confined in a one-dimensional box is observed, at different times, to have energies of 32.5 eV, 57.8 eV, What is the length of the box
An artificial satellite is moving in a circular orbit with a speed of 6.3 km/s and a period of 84.0 min. What is the acute angle between the radius vector and the total acceleration of the satellite
A car of mass 930 kg is traveling over the top of a hill, If the hill has a radius of curvature of 38 m and the car is traveling at 13 m/s, what is the normal force between the hill and the car at the top of the hill
q1. brass is an alloy made from copper and zinc. a .59 kg brass sample at 98 c is dropped into 2.8 kg of water at 5 c.
A bicycle wheel of radius 0.50 m is rolling without slipping on a horizontal surface with an angular speed of 3pie rad/s when the cyclist begins to uniformly apply the breaks. find the initial tangential velocity of the bicycle wheel
You want to create a spherical mirror with a focal length of +15.0 cm. Will the mirror be concave or convex
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