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A 1000-W iron is left on the iron board with its base exposed to the air at 20°C. The convection heat transfer coefficient between the base surface and the surrounding air is 35 W/m2· °C. If the base has an emissivity of 0.6 and a surface area of 0.02 m2, determine the temperature of the base of the iron.
A cyclotron designed to accelerate protons has an outer radius of0.330 m. The protons are emitted nearly at rest from a source at the center and are accelerated through 600 V each time they cross the gap between the dees. The dees are between the ..
Pseudo-wavevectors within first Brillouin zone
Find the mass of this objectAn object of unknown mass is attached to an ideal spring with force constant 130 and is found to vibrate with a frequency of 5.60 Hz. found to vibrate with a frequency of 5.60 Hz. Find the period. Find the angular veloci..
find the angle between the position vectors to the points 3 -4 0 and -2 1 0 and find the direction cosines of a vector
An interstellar cruise ship races by a Martian spaceport. According to galactic regulations, the safety strobe lights on the ship's bridge are assumed to blink every 1.50 seconds.
You need to design a capacitor capable of storing 4.0 x 10-7 C of charge. Determine the limit of the separation of the plates
A mirror creates an image of magnification ?1/3. (a) Is the image upright or inverted? (b) If the object is 7.75 cm tall, what is the height of the image
The upward normal force exerted by the floor is 670N on an elevator passenger who weighs 710N . A) What is the reaction force to the upward normal force exerted by the floor? B) What is the reaction force to weight of the passenger? C) What is the ma..
a 336-g mass vibrates according to the equation x0.4 cos7.9 t where x is in meters and t is in seconds. what is the
Bob walks 320 south, then jogs 450southwest, then walks 320 in a direction 35east of north. Find the direction of the displacement that will return Bob to his starting point by the most direct route
three liquids are at temperatures of 10 degrees c 20 degree c and 30 degrees c respectively. equal masses of the first
A shopper in a supermarket pushes a cart with a force of 37.5 N directed at an angle of 17.0° downward from the horizontal. Find the work done by the shopper on the cart as he moves down an aisle 45.0 m long
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