Physics, 10.11.2019 14:31, zachzach28280
Amass hangs on the end of a massless rope. the pendulum is held horizontal and released from rest. when the mass reaches the bottom of its path it is moving at a speed v = 2.3 m/s and the tension in the rope is t = 22.5 n.
how long is the rope?
what is the mass?
if the maximum mass that can be used before the rope breaks is mmax = 1.74 kg, what is the maximum tension the rope can withstand? (assuming that the mass is still released from the horizontal.)
now a peg is placed 4/5 of the way down the pendulum’s path so that when the mass falls to its vertical position it hits and wraps around the peg. how fast is the mass moving when it is at the same vertical height as the peg (directly to the right of the peg)?
return to the original mass. what is the tension in the string at the same vertical height as the peg (directly to the right of the peg)?
Answers: 3
Physics, 22.06.2019 08:00, jpsaad00
Tafari worked one summer on a ship that set weather buoys in the ocean. he watched how one of the buoys moved in the water. describe which parts of the wave would cause the buoy to bob up and down. which wave property determined how fast the buoys bobbed in the water? he observed that when the wind blew harder, the ocean waves were larger, and the buoys moved away from the ship. what effect, if any, did the waves have on how far the buoys moved? explain your answer.
Answers: 3
Physics, 22.06.2019 18:00, maren17
Air enters a gas turbine with two stages of compression and two stages of expansion at 100 kpa and 17°c. this system uses a regenerator as well as reheating and intercooling – the intercooler returns the air to the inlet temperature. the pressure ratio across each compressor is 4 ; 300 kj/kg of heat are added to the air in each combustion chamber; and the regenerator operates perfectly while increasing the temperature of the cold air by 20°c. determine the system’s thermal efficiency. assume isentropic operations for all compressor and the turbine stages and use constant specific heats at room temperature. (0.378)
Answers: 3
Physics, 22.06.2019 19:20, gokusupersaiyan12345
The dipole moment of the water molecule (h2o) is 6.17x10^-30 c. m. consider a water molecule located at the origin whose dipole moment p points in the +x-direction. a chlorine ion ( of charge-1.60x10^-19c , is located at x=3.00x10^-9m . assume that is much larger than the separation d between the charges in the dipole, so that the approximate expression for the electric field along the dipole axis can be used. a) find the magnitude of the electric force that the water molecule exerts on the chlorine ion. b) what is the direction of the electric force. -x-direction or +x-direction c) is this force attractive or repulsive?
Answers: 1
Amass hangs on the end of a massless rope. the pendulum is held horizontal and released from rest. w...
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