Physics, 01.07.2019 23:00 MoparorNocar061401
As opposed to the concave lenses, which characteristics of convex lenses makes them useful in microscopes?
Answers: 1
Physics, 21.06.2019 19:40
An ideal spring has a spring constant (force constant) of 2500 n/m, is stretched 4.0 cm, how much elastic potential energy does it possess? (a) 3j (b) 0.00j (c) 1j (d) 2j (e) 4j
Answers: 1
Physics, 22.06.2019 00:30
Consider an ordinary, helium-filled party balloon with a volume of 2.2 ft3. the lifting force on the balloon due to the outside air is the net resultant of the pressure distribution exerted on the exterior surface of the balloon. using this fact, we can derive archimedes’ principle, namely that the upward force on the balloon is equal to the weight of the air displaced by the balloon. assuming that the balloon is at sea level, where the air density is 0.002377 slug/ft3, calculate the maximum weight that can be lifted by the balloon. note: the molecular weight of air is 28.8 and that of helium is 4.
Answers: 2
Physics, 22.06.2019 12:00
Asolid round steel rod 6.25 mm in diameter and 375 mm long is rigidly bonded to the end of solid square brass rod 25 mm on a side and 300 mm long. the geometric axes of the bare are along the same line. an axial tensile force of 5.4 kn is applied at the extreme ends of the assembly. for steel e = 200 gpa and for brass e = 90 gpa. determine the total elongation for the assembly.
Answers: 1
Physics, 22.06.2019 14:10
Amachinist turns the power on to a grinding wheel, at rest, at time t = 0 s. the wheel accelerates uniformly for 10 s and reaches the operating angular velocity of 96 rad/s. the wheel is run at that angular velocity for 40 s and then power is shut off. the wheel slows down uniformly at 1.5 rad/s2 until the wheel stops. in this situation, the time interval of deceleration is closest to:
Answers: 3
As opposed to the concave lenses, which characteristics of convex lenses makes them useful in micros...
Physics, 18.10.2021 14:00
Biology, 18.10.2021 14:00
Mathematics, 18.10.2021 14:00
Mathematics, 18.10.2021 14:00
English, 18.10.2021 14:00
Mathematics, 18.10.2021 14:00
English, 18.10.2021 14:00
English, 18.10.2021 14:00
History, 18.10.2021 14:00
History, 18.10.2021 14:00
Mathematics, 18.10.2021 14:00
Biology, 18.10.2021 14:00
Physics, 18.10.2021 14:00
English, 18.10.2021 14:00
Computers and Technology, 18.10.2021 14:00