Correct answer only ! i cannot retake this and i need all correct answers !
true or fa...
Physics, 19.10.2019 12:30 hollisjune3047
Correct answer only ! i cannot retake this and i need all correct answers !
true or false: doorbells, scrap yards, and rock concerts are all examples of every day uses of electromagnets.
Answers: 1
Physics, 21.06.2019 20:20
Astronomers discover an exoplanet (a planet of a star other than the sun) that has an orbital period of 3.87 earth years in its circular orbit around its sun, which is a star with a measured mass of 3.59 x 1030 kg. find the radius of the exoplanet's orbit.
Answers: 3
Physics, 21.06.2019 22:50
A23 kg log of wood begins from rest, 300 m up a sluice (a water track used to transport logs, think of it as an inclined plane with negligible friction) inclined at 20° to the horizontal. after it reaches the flat waterway at the bottom it collides elastically with a 100 kg block of wood initially at rest near the base of the incline. (a) how long does it take the 23 kg log to travel down the incline? (b) what is the speed of the 23 kg log at the bottom of the incline? (c) what are the velocities of both blocks of wood after the collision? (d) what is the total kinetic energy before the collision? (e) what is the kinetic energy of the 23 kg log after the collision? (f) what is the kinetic energy of the 100 kg block of wood after the collision? (g) what is the total kinetic energy after the collision? (h) compare the total initial and total final kinetic energies. is this consistent with what you would expect for elastic collisions? explain!
Answers: 1
Physics, 22.06.2019 11:30
If we relied solely on the nonrenewable resources found in the u.s., which one would we run out of first at current usage levels? a. natural gas b. oil c. uranium d. coal
Answers: 1
Physics, 22.06.2019 14:20
4r-134a enters the condenser of a residential heat pump at 800 kpa and 50°c at a rate of 0.022 kg/s and leaves at 750 kpa subcooled by 3°c. the refrigerant enters the compressor at 200 kpa superheated by 4°c determine (a) the isentropic efficiency of the compressor, (b) the rate of heat supplied to the heated room, and (c) the cop of the heat pump. also, determine (d) the cop and rate of heat supplied to the heated room if this heat pump operated on the ideal vapor-compression cycle between the pressure limits of 200 and 800 kpa. (0.757, 4.37 kw, 5.12, 6.18, 3.91 kw)
Answers: 3
English, 07.08.2019 22:20
Mathematics, 07.08.2019 22:20
Computers and Technology, 07.08.2019 22:20
Computers and Technology, 07.08.2019 22:20
Computers and Technology, 07.08.2019 22:20
Computers and Technology, 07.08.2019 22:20
Computers and Technology, 07.08.2019 22:20
Computers and Technology, 07.08.2019 22:20
Computers and Technology, 07.08.2019 22:20
Computers and Technology, 07.08.2019 22:20
Computers and Technology, 07.08.2019 22:20
Computers and Technology, 07.08.2019 22:20
Computers and Technology, 07.08.2019 22:20
Computers and Technology, 07.08.2019 22:20