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Several bacteria are propelled by motors that spin hair-like flagella. A characteristic bacterial motor turning at a constant angular velocity has a radius of 1.9x10-8m, and a tangential speed at the rim of 2.9x10-5 m/s. (a) What is the angular speed (the magnitude of the angular velocity) of this bacterial motor? (b) How long does it take the motor to create one revolution?
A mass of 5 kg of saturated liquid-vapor mixture of water is contained in a piston-cylinder device at 125 kPa. Initially, 2 kg of the water is in the liquid phase and the rest is in the vapor phase. Heat is now transferred to the water, and the pisto..
A 4.0x104 kg spaceship located halfway between them. What is the total potential energy of the ship
What is the tension in the string.At one time, television sets used "rabbit-ears" antennas. Such an antenna consists of a pair of metal rods.
An explosion breaks an object into two pieces, one of which has 1.5 times the mass of the other. how much kinetic energy did each piece acquire
Suppose the act of throwing the tool takes the austronaut 0.7 seconds, that is she applied a force to the tool before it leaves her hand. What velocity toward the space shuttle will that have given her? And if she was 12m away from the shuttle to sta..
The cars stick together and move as a unit after the collision, at an angle of 47.0° north of east and at a speed of 6.36 m/s. Find out the speed of the 3000 kg car before the collision.
A particle of charge +13 µC and mass 2.50 10-5 kg is released from rest in a region where there is a constant electric field of +270 N/C. What is the displacement of the particle after a time of 1.30 10-2 s
A gymnast performing a routine on the high bar feels weightless at the highest point of their rotation. Why does the gymnast feel weightless at the highest point of their rotation around the bar? What is the cause of this phenomenon
Imagine that you are riding a bicycle facing due east, and travelling forwards. In what direction is the angular momenta of the bicycle wheels
A 0.335 m string is clamped at both ends. If the lowest standing wave frequency in the string is 326 Hz, Evaluate what is the speed
Suppose the temperature of 4.63 L of ideal gas drops from 353 K to 275 K. (a) If the volume remains constant and the initial pressure is atmospheric pressure, find the final pressure. Pa (b) Find the number of moles of gas. mol
a stores sign with a mass of 20.0 kg and 3.00 m long has its center of gravity at the center of the sign. it is
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