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a) Why does water in a metal canteen stay cooler if the cloth jacket surrounding the canteen is kept moist?
b) Does an ordinary electric fan cool the air? why or why not?.if not why utilize it?
c) When a hot-air furnace is used to heat a house, why is it significant that there be a vent for air to return to the furnace? What happens if this vent is blocked by a bookcase?
d) Micros processor chip have a "heat sink" glued on top that looks like a series of fins, why is it shaped like that?
In a football game a kicker attempts a field goal. The ball remains in contact with the kicker's foot for 0.0682 s, determine the vertical components of the launch velocity.
A one loop circuit is connected thus: A 3.0 V source, with the + side connected to a 10 ohm resistor, how much power does the bulb dissipate
An object in simple harmonic motion has an amplitude of 0.377 m and an oscillation period of 0.620 s. Determine the maximum speed of the motion
The wall of a house consists of three layers: a wooden outer wall with an R factor of 1.0, a 3in layer of fiberglass insulation with an R factor of 11, what is the rate of heat loss throug an 8ft by 15ft section of this wall
Tasha with a nearsighted eye has near and far points of 16 cm and 25 cm, respectively. What is the power of the lens she uses
a capacitor is connected to a 240v peak 50hz power supply. if the maximum current is 430ma what is the capacitance?
In a certain series RLC circuit, Irms = 9.00 A, ?Vrms = 155 V, and the current leads the voltage by 31.0°. What is the total resistance of the circuit
The side-view mirror of an automobile has a radius of curvature of 15.0 cm. How far is the object from the mirror
An air-filled toroidal solenoid has a mean radius of 15.5cm and a cross-sectional area of 4.95cm2. How many turns does the winding have?
A block with a weight of 3.0 N is at rest on a horizontalsurface. A 1.0 N upward force is applied to the block by meansof an attached vertical string. What are the (a) magnitude of and(b) direction of the force of the block on the horizontalsurface?
What is an actual mechanical advantage of the system
suppose you have just discovered a new x-shy-ray binary which contains a b2 main sequence star orbiting an unseen
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