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A wall is composed of two materials. Material 1 has a thickness of3.22 cm and a thermal conductivity of 0.1 while material 2 has athickness of 8.49 cm and a conductivity of 1. If the temperature difference inside to outside is 25 Co and the wall hasan area of 10 m2, what is the energy loss per second to the nearest watt?
The coefficient of performance of a refrigerator is 4.70. The compressor uses 20.0J of energy per cycle. How much heat energy is exhausted per cycle
find the magnitude and direction of the field at this point.
Between the poles of a powerful magnet is a cylindrical uniform magnetic field with a diameter of 2.50 and a strength of 1.10. find what is the current flowing in it
question1a long solenoid with 70 turns of wire per centimeter carries a current of 0.16. the wire that makes up
To warm up for a match, a tennis player hits the 56.0 ball vertically with her racket. what impulse did she impart to it
A slide projector has a lens of focal length 150 mm. An image of 100 cm by 100 cm is formed of a slide whose dimensions are 50 mm by 50 mm
A trolley that moves along a horizontal beam is acted upon by two forces as shown. (a) Knowing that a 5 25°, determine by trigonometry the magnitude of the force P so that the resultant force exerted on the trolley is vertical. (b) What is the cor..
A nearsighted patient's far point is 0.521 m from her eyes. What is the distance between her eyes and the glasses
A stationary whistle emits a sound of 188Hz. If passengers in a car hear the whistle with a frequency of 198 Hz, how fast was the car moving? Make use of 340 m/s for the sound velocity.
An electron moves in a circular path perpendicular to a uniform magnetic field with a magnitude of2.03mT. If the speed of the electron is1.53107m/s, determine the following. the radius of the circular path
On aircraft carriers, catapults are used to accelerate jet aircraft to flight speeds in a short distance. What is the acceleration of the jet in m/s2
A golf ball is hit on a 7.2m tall hill at 23m/s and 30° above the horizontal, what is its velocity at the peak of its flight
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