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A steel section of the Alaskan pipeline had a length of 65 m and atemperature of 22°C when it was installed. What is its change in length when the temperature dropsto a frigid -48°C?
A 0.80-kg book moves verticallyupward a distance of 17 m, andthen vertically downward 17 m,returning to its initial position. How much work is done by gravity during the upward motion of the book?
There are two identical, positively charged conducting spheres fixed in space, find the initial charge on each sphere, q1 and q2 if initially q1
On a frozen pond, a 9 kg sled is given a kick that imparts to it an initial speed of v0 = 2.5 m/s. find the distance the sled moves before coming to rest
1 in the formation of a star a large volume of gas and dust particles contracts due to gravitational pull. which of the
Two 4.0-g spheres are suspended by 9.0-cm-long light strings. determine the electric field intensity that enables the spheres to be in equilibrium at ? = 12°
One liter of water is 41C is used to make iced tea. How much ice at 0 C must be added to lower the temperature of the tea to 17C? The specific heat of water is 1 cal/g C and latent heat of ice is 79.7 cal/g. Reply in units of g.
a billiard ball collides in an elastic head-on collision with a second identical ball. what is the kinetic energy of
A projectile is fired vertically from Earth's surface with an initial speed of 8.9 km/s. Neglecting atmospheric friction, how far above the surface of Earth will it go
The hunter uses a small powerboat that moves at a maximum speed of 9 km/h with respect to the water. Illustrate what is the minimum time necessary for crossing?
The rms current in a 44-? resistor is 0.50 A. What is the peak value of the voltage across this resistor
A 400 N stun pilot who has been driving his fighter plane vertically pulls out of the dive by changing her course to a circle in a vertical plane. what is the apparent weight of the pilot at the lowest point
Calculate the capacitance of a capacitor whose plates a 20.0 cm by 3.0 cm and are separated by a 1.0mm air gap. What is the charge on each plate if the capacitor is connected to a 12.0 V battery
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