Questions asked
The density of water is 1.00×103 kg/m3, and the density of mercury is 1.36×104 kg/m3. Calculate the absolute pressure ????b at the bottom of a 0.250-m tall graduated cylinder that is one?third full of mercury and two?thirds full of water.
Mahipal Kumawat
Numerade educator
Assume that the space shuttle orbited Earth at altitudes of around 3.00×105 m. Determine the time T for one orbit of the shuttle about Earth. How many sunrises per day, n, did the astronauts witness?
Very high?speed ultracentrifuges are useful devices to sediment materials quickly or to separate materials. An ultracentrifuge spins a small tube in a circle of radius 12.9 cm at 8.00×104 rev/min. What is the centripetal force ????cent experienced by a sample that has a mass of 2.70 g?
Nishant Kumar
A coin that has a mass of 25.0 g rests on a phonograph turntable that rotates at 61.0 rev/min. The center of the coin is 13.0 cm from the turntable axis. If the coin does not slip, what is the minimum value of the coefficient of static friction ????s between the coin and the turntable surface?
An amusement park ride called the Rotor debuted in 1955 in Germany. Passengers stand in the cylindrical drum of the Rotor as it rotates around its axis. Once the Rotor reaches its operating speed, the floor drops but the riders remain pinned against the wall of the cylinder. Suppose the cylinder makes 27.0 rev/min and has a radius of 4.50 m. What is the minimum coefficient of static friction μs between the wall of the cylinder and the backs of the riders?