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A wall in a house contains a single window. The window consists of a single pane of glass whose area is 0.14 m2 and whose thickness is 8 millimeter. Treat the wall as a slab of the insulating material Styrofoam whose area and thickness are 12 m2 and 0.10 meter, correspondingly. Heat is lost via conduction through the window and the wall. The temperature difference between the outside and inside is the similar for the window and the wall. Of the total heat lost by the window and the wall, compute what is the percentage lost by the window?
An airplane is to drop an abject to hit a target on the ground. The plane is flying at a constant speed of 300 km/h horizontally, How far in advance should the object be let go in order for it to reach the target
An electron is moving east in a uniform electric field of 1.55 directed to the west. What is the speed of the electron when it reaches point B, which is a distance of 0.380 east of point A
A 461.1N child and a 114N child sit on either end of a 2.9m long seesaw. suppose a 280N child sits .196m from the 461.4N child. how far from the pivot must a 218N child sit to maintain rotational equilibrium?
Consider a light airplane, 5158 lbs, with a tricycle landing gear. The front wheel is 5.62’ ahead of the c.m., the rear wheels are 1.12’ behind the c.m. The front wheel strut is 1” dia and the rear wheel struts are 3” dia.
A mass is accelerating when it is seen doing what? Now that we know the newton's law, what can beinfered about mass which is accelerating? How can you explain why your car stops quicker when tires continue rotating during braking?
The minimum stopping distance for a car traveling at a speed of 30 {m/s} is 60 {m}, including the distance traveled during the driver's reaction time of 0.50 {s}.What is the least stopping distance for the same car traveling at a speed of 41 {m/s}..
the equation for the frequency f of oscillation of simple pendulum is f 12p vglwhere l is the length of the pendulum
If the end of the crutch is a circle of radius 1.0 without the tip, by what factor does the tip reduce the pressure exerted by the crutch
Consider an insulated enclosed volume of 27m^3 containing dry air at 23 degrees celsisus and 980mb, What is the specific volume and mass of the air sample
At a carnival, you can try to ring a bell by striking a target with a 7.99-kg hammer. How fast must the hammer be moving when it strikes the target so that the bell just barely rings
A LASIK vision correction system uses a laser that emits 10 -long pulses of light, each with 2.5 of energy. The laser is focused to a 0.90 -diameter circle. What is the average power of each laser pulse
Long parallel wires separated by 7.5 cm carry 3.3 Amperes each in opposite directions. What magnetic force per length acts on the wires
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