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Let P be the total petroleum reservoir on Earth in the year t. (In other words, P represents the total quantity of petroleum, including what's not yet discovered, on Earth at time t.) Assume that no new petroleum is being made and that P is measured in barrels. What are the units of dP/dt? What is the meaning of dP/dt? What is its sign? How would you set about estimating this derivative in practice? What would you need to know to make such an estimate?
When the starter motor on a car is engaged, there is a 330A current in the wires between the battery and the motor, What minimum diameter can the wires have if the voltage drop along the wires is to be less than 0.45V
question1calculates the average velocity in following two cases.a you walk 73.2m at the speed of 1.22ms and then run
A copper rod of cross-sectional area 11.2 cm2 has one end immersed in boiling water and the other in an ice-water mixture, which is thermally well insulated except for its contact with the copper. How many grams of ice melt each second
A simple pendulum is made from a 0.51 mlong string and a small ball attached to its free end. The ball is pulled to one side through a small angle and then released fromrest. After the ball is released, how much time elapses before itattains its grea..
The light emitted by a helium-neon laser has a wavelength of 632.8 nm in air. As the light travels from air into fused quartz, determine the wavelength in fused quartz
A basketball player jumps straight up for a ball. To do this, he lowers his body 0.250 m and then accelerates through this distance by forcefully straightening his legs. This player leaves the floor with a vertical velocity sufficient to carry him..
A sealed chamber, totally submerged is anchored to the ocean floor. If the chamber has a mass of 2.5 x 140^7 kg and a volume of 2.8 x10^4 m³; What is the buoyant force on the chamber? What is the tension in the anchor chain holding the chamber under ..
How much work is done by the horizontal force F_p = 150 N on the 18 kg block of the figure when the force pushes the block 5.5 m up along the 32 degree frictionless incline
In a volcanic eruption, 2 km3 of mountain with a density of 1600 kg/m3 was lifted an average height of 513 m. How much energy in joules was released
if a 1.1x1011 n force is applied on each 100.0 m cylinder of aluminum brass and steel with a radius of 10.0 m figure 8
A bucket of water is whirled in a vertical circle of radius 90cm,What is the least speed that will keep the water from falling out.
A bicycle wheel of mass M (assumed to be concentrated at its rim) and radius R is mounted horizontally so it may turn without friction on a vertical axle. A dart of mass mo is thrown with velocity vo above and sticks in the tire.
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