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The coefficient of linear expansion of an alloy is 1.20 x 10-5 (oC)-1. At 20.0o C a tube made of this alloy has a length of 18.0200 m. The tube is cooled to -25.0o C. Calculate the change in length (ΔL) of the tube. Remember that a negative change in length means that the length decreases, and a positive change in length means that the length increases.
A football player punts the football so that it will have a "hang time" (time of flight) of 4.5 s and land 58 m away. What must be the magnitude of the ball's initial velocity
A stream of water strikes a stationary turbine blade horizontally, as the drawing illustrates. Find the magnitude of the average force exerted on the water by the blade
A charged sphere of mass 2.5x10^-5 kg and net charge of 6.0x10^-9 C hangs from a silk thread, what is the magnitude of the charge dentist on each plate
The moon's diameter is 3.48 x 10 6 m, and its mean distance from the earth is 3.85 x 10 8 m. what is the diameter of the moon's image on the screen
a planar slab of thickness of 5.00 cm has a uniform volume charge density of 5.20times10-2 c m3. find the magnitude of
Diego, Mighty Sled Dog of the North, pulls a 45.0 Kg sled across level snow with a force of 225 N on a rope that is 35.0 degree above the horizontal. Make a drawing of the situation. This is Diego; use him in your drawing.
In the circuit shown in the figure, the 6.0 ohm resistor is consuming energy at a rate of 23.0 J/s, Find the current through the ammeter in amps
A spring stretches by 0.0240 m when a 3.40-kg object is suspended from its end. How much mass should be attached to this spring so that its frequency of vibration is f = 4.65 Hz
The rate of physical growth is slow during which period of life?
Suppose the coefficient of static friction between the road and the tires on a car is 0.575 and the car has no negative lift. What speed will put the car on the verge of sliding
A race car goes through a flat, circular 90 degree turn at a constant speed of 221 miles/hr. The acceleration of the car is observed to be 3 times bigger than the acceleration of an object in freefall (3g). Determine the radius of the turn.
Golf: Rocky strikes a 0.058-kg golf ball with a force of 272 N and gives it a velocity of 62.0 m/s. How long was Rocky's club in contact with the ball
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