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An aluminium sphere with a specific gravity of 2.7 falls through water and reaches a terminal speed of 7 m/s. What is the terminal speed of an air bubble of the same radius rising through the water? The temperature is 20 degrees C.
Review Conceptual Example 2 as an aid in solving this problem. An object is attached to the lower end of a 100-coil spring that is hanging fromthe ceiling. The spring stretches by 0.172 m. The spring is then cut into two identical springs of 50 co..
A 1.50e-14 kg oil drop accelerates downwards at a rate of 1.80 m/s^2 when placed between two horizontal plates that are 9.40 cm apart. Determine the magnitude of the charge on the oil drop
A toaster uses a heating wire. When the toaster is turned on at 13°C, the initial current is 2.13 A. A few seconds later, thetoaster warms up and the current has a value of 1.59 A. The averagetemperature coefficient of resistivity for this wire is..
One mole of a ideal gas initially at temp To=0C undergoes an expansion at a constant pressure of 1atm to four times it original volume
Consider the system described in the example with m1 = 0.51 kg and m2 = 0.40 kg. If F is sufficiently large, it is clear that the block will accelerate to the right. Find the range of F that allows the system to remain at rest
A 1500-kg car moving east at 17 m/s collides with a 1800-kg car moving south at 15 m/s and the two cars stick together. What is the velocity of the cars right after the collision
A person who weighs 680 N is riding a 98-N mountain bike. Suppose the entire weight of the rider and bike is supported equally by the two tires. If the gauge pressure in each tire is 6.45 105 Pa, what is the area of contact between each tire and the ..
A helicopter blade spins at 115 revolutions per minute. Its tip is 7.00 m from the center of rotation. What is its average velocity over one revolution
A solid aluminium cube 20 cm on an edge floats face-down onmercury. How much higher on the cube's sides will the mercury level be
A projectile is fired vertically from Earth's surface with aninitial speed of 4.6 km/s. Neglecting air drag, how far above thesurface of Earth will it go
1300-L rigid tank contains 16 kg of refrigerant-134a vapor at 320 kPa. The refrigerant is cooled until the temperature reached -14oC. Determine the internal energy change for this process
Two examples of chemotherapeutic drugs (drugs used to treat cancer) and their cellular actions are listed below. Describe why each drug could be fatal to a cell.
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