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An air bubble of 10 cm^3 is created at bottom of a lake, where the temperature is 5 degree celsius and is 100 m deep.
a) What is the pressure at the bottom
b) What is the bouancy force exerted on the air bubble?
c) As the air bubble rises towards the surface of the lake where the temperature is 30 degree celsius the volum becomes larger and larger, what is the volume of the bubble just before it reaches the surface of ther lake. denisty of water is p=1,000 kg/m^3 and atmospheric pressure is Pa=1.103 x 10^5 N/m^2.
A soccer ball is kicked with an initial horizontal velocity of 18 m/s and an initial vertical velocity of 13 m/s, What is the speed of the ball 0.8 seconds after it was kicked, What is the maximum height the ball goes above the ground
Explain what is the current in the cell during this period? Assume that the gold ions carry one elementary unit of positive charge.
In a region where there is an electric field, the electric forces do +8.00x 10^-19 J of work on an electron as it moves from point X to point Y.What is the potential difference, VY - VX, between point Y and point X?
An electric eel develops a 460V potential difference between its head and tail. What is the energy delivered by this pulse
When a 4.0 µF capacitor is connected to a generator whose rms output is 34 V, the current in the circuit is observed to be 0.40 A
Kathy tests her new sports car by racing with Stan, an experienced racer. Both start from rest, Find the time at which Kathy overtakes Stan
A box of books weighing 327 N is shoved across the floor by a force of 471 N exerted downward at an angle of 35° below the horizontalIf μk between box and floor is 0.52, how long does it take to move the box 4.80 m starting from rest.
An airplane travels x = 4.50 x 10^2 km due east and then travels an unknown distance y due north. Finally, it returns to its starting point by traveling a distance of r = 525 km. How far did the airplane travel in the northerly direction.
A magnifying glass has a focal length of 8cm. How close to an object do you need to place the magnifying glass, What type of image is this and what is its magnification
The length of a string is 456 cm. It is held ?xed at each end. The string vibrates in three sections; i.e., the string has three antinodes and string vibrates at 180 Hz.
A 50g ball of clay is thrown horizontally at 40m/s toward a 1.5kg block sitting at rest on a frictionless hi surface. The clayts and sticks to the block. What impulse does the clay exert on the block
What is the force on the 1 nC charge at the bottom. how far will it skid if it is traveling at 120 km/h when its brakes lock.
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