Select all the correct answers.
in which situations is work being done?
a. hannah leans...
Physics, 26.08.2019 09:50 maxstmichel3868
Select all the correct answers.
in which situations is work being done?
a. hannah leans against her locker, but it doesn’t move.
b. andy’s car rolls down a hill with the engine off.
c. a wind turbine stands still on a sunny, windless day.
d. a balloon expands as it is heated by the sun.
e. james pedals a stationary exercise cycle that doesn’t move.
Answers: 2
Physics, 22.06.2019 11:30
Water is siphoned from a large tank and discharges into the atmosphere through a 50-mm diameter tube. the end of the tube is b = 2.1 m below the tank bottom which is a = 7.4 m deep, and viscous effects are negligible. determine the maximum height h over which the water can be siphoned without cavitation occurring. atmospheric pressure is 101.4 kpa, and the water vapor pressure is 1.79 kpa (absolute)
Answers: 3
Physics, 22.06.2019 14:40
Asolid cylinder and a cylindrical shell have the same mass, same radius, and turn on frictionless, horizontal axles. the cylindrical shell has light-weight spokes connecting the shell to the axle. a rope is wrapped around each cylinder and tied to blocks of equal masses that are held the same height above the ground. both blocks are released simultaneously. the ropes do not slip. which block hits the ground first? or is it a tie?
Answers: 3
Physics, 22.06.2019 17:40
Along wire carrying a 4.2 a current perpendicular to the xy-plane intersects the x-axis at x=−1.7cm. a second, parallel wire carrying a 3.0 a current intersects the x-axis at x=+1.7cm. part a at what point on the x-axis is the magnetic field zero if the two currents are in the same direction? express your answer to two significant figures and include the appropriate units.
Answers: 2
Physics, 22.06.2019 23:30
Avector a⃗ has a length of 8.6 m and points in the negative x direction. find the x component of the vector −3.7a⃗ .
Answers: 1
Mathematics, 29.10.2019 19:31
World Languages, 29.10.2019 19:31
Mathematics, 29.10.2019 19:31
Mathematics, 29.10.2019 19:31
English, 29.10.2019 19:31
Mathematics, 29.10.2019 19:31
History, 29.10.2019 19:31
Biology, 29.10.2019 19:31
Mathematics, 29.10.2019 19:31
History, 29.10.2019 19:31
History, 29.10.2019 19:31
History, 29.10.2019 19:31