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1. A girl delivering newspapers travels 1 blocks west, 2 blocks north, and then 6 blocks east.
(a) What is her resultant displacement?
2. A person walks 33° north of east for 2.33 km. How far would another person walk due north and due east to arrive at the same location? km due north km due east.
An object is a distance 6f from a converging lens. construct a ray diagram showing the location and orientation of the image
By how much does a 10-cm-thick layer of glass wool insulation decrease the heat loss through the roof of a house (area 100 m2, Rf = 0.15 m2K/W for the roof alone, Rf = 2.5 m2K/W for 10-cm-thick glass wool)
A speedboat moves on a lake with initial velocity vector v1,x = 8.21 m/s and v1,y = -2.95 m/s, What are the components of the speedboat\'s final velocity, Find the speedboat's final speed
A container holds 0.90 g of oxygen at a pressure of 7.7 atm. a)How much heat is required to increase the temperature by 113 C at constant pressure? b) How much will the temperature increase if this amount of heat energy is transferred to the gas at c..
A 25.1-mW laser beam of diameter 2.15 mm is reflected at normal incidence by a perfectly reflecting mirror. Calculate the radiation pressure on the mirror
A bullet, with an initial velocity of 300m/s and a mass of 5g, is fired into a block of wood. The bullet is brought to a stop at 5cm deep in the block of wood. Calculate the force the block of wood exerted on the bullet during this time
Water flows through a fire hose of diameter 7.09 cm at a rate of 1.2 x10-2 m3/s. What is the velocity with which the water exits the hose
target 1 cm2 in area and 0. 1 cm thick. There are 0.048 x 1 024 atoms per cm3 in the target, and the total cross-section at the energy of the beam is 4.5 b. What is the macroscopic total cross-section
Calculate the index of refraction for a piece of glass that is 3.5 cm thick if the ray inside the glassmakes an angle of 25.4 degree with respect to the normal
A 3.80 kg block is pushed along the ceiling with a constant applied force of 85.0 N that acts at an angle of 55.0° with the horizontal, Determine the coefficient of kinetic friction between block and ceiling
When is there no work on an object. For example, a weightlifter picks up a weight, or a kid wearing skates pushes of a wall and moves in the opposite direction. Why is the force in each problem not doing work
Two protons are placed at a = 4.69 cm above and below the x axis at x = 0 as shown in the figure. An electron is placed along the x axis a distance b = 10.1 cm from the origin. find the magnitude of the electrostatic force on the electron
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