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At 20 degrees celsius the surface tensions for water and mercury are 73dyn/cm and 470dyn/cm respectively. Find these values in SI units. A small capillary tube of 1mm diameter is placed into a container of 20 degree celsius water. will the level of the water in the tube move above or below the level of water? by what distance in meters? Next, calculate the volume and then the mass in kg. of the water being moved up or down. Repeat this problem for mercury.
What effect does temperature have upon surface tension? Is it better to wash clothes in hot water or cold water?
The drive propeller of a ship starts from rest and accelerates at 2.50 x 10-3 rad/s2 for 2.15 x 103 s. find the total angular displacement of the propeller
Two dogs fight over a bone. The larger of the two pulls on the bone to the right with a force of 42 Newton. The smaller one pulls to the left with a force of 35 Newton. Find the net force acting on the bone
Air enters an insulated turbine operating at a steady state at 5 bar, 1000K and exits at 1 bar, 500K. Neglecting KE and PE changes and assuming ideal gas behavior, find whether the expansion is internally reversible, irreversible or impossible.
Water flows out of a shower in a typical house at a rate of 20 liters/min. what is the difference between the pressure in the tank and atmospheric pressure
a skier of mass m is standing on a slope with an angle of elevation ø. After being given a tiny nudge, the skier slides down the slope, how much energy is lost while the skier slides down the incline
A stubborn 110 kg pig sits down and refuses to move. Calculate the force which farmer needs to apply to budge the pig
A boat heads directly across a river. Its speed relative to the water is 3 m/s. How fast is the boat going relative to the bank of the river
A battery has fully charged a capacitor. The battery emf is ε= 20 Volt. The resistance R= 60 ohm. The capacitance C = 1.0 μF. Find what is the charge Q on the capacitor at t= 60 μs
A uniform magnetic field , with magnitude 1.2 mT, is directed vertically upward throughout the volume of a laboratory chamber. What magnetic deflecting force acts on the proton as it enters the chamber
The magnitude of the force the sun exerts on Uranus is 1.41X10^21 newtons. Explain how it is possible for the sun to exert a greater forceo n Uranus then Neptune exerts on Uranus. A 2.0 kg object is falling freely near Earth's surface. What is the ..
An object is moving along a straight line and the uncertainty in its position is 1.5 m. Find the minimum uncertainty in the momentum of the object
three particles of mass m = 0.027 kg are fastened to three rods of length d = 0.13 m and negligible mass. determine the rotational inertia of the assembly
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