Answers: 3
Physics, 21.06.2019 17:10
Space-time metric ds2= -dt2+at2dx2+bt2dy2+ct2dz2 (a)how does the area of a rectangle with vertices at ( x=0, y=0, z=0 ), (1,0,0 ), ( 0,1,0 ) and (1,1,0 ) changes with time? (b) if a photon moving in the x direction starts from the origin at t=1, when does it reach x=l? (ds=0 for the trajectory of a photon.) (c) the proper time for a particle is defined by cd=ds. what is the proper time for a particle to move along the trajectory ( x(t)=t, y(t)=0, z(t)=0 ) from t=0 to 1 ? what is the condition on the parameter a so that the velocity of the particle never exceeds the speed of light ?
Answers: 2
Physics, 22.06.2019 01:10
The 10-kg double wheel with radius of gyration of 125mm about o is connected to the spring of stiffness k = 600 n/m by a cord which is wrapped securely around the inner hub. if the wheel is released from rest on the incline with the spring stretched 225 mm, calculate the maximum velocity v of its center o during the ensuing motion. the wheel rolls without slipping
Answers: 1
Physics, 22.06.2019 15:10
Suppose that f : rn β rm and that a β k, where k is a connected subset of rn . suppose further that for each x β k there exists a Ξ΄x > 0 such that f(x) = f(y) for all y β bΞ΄x (x). prove that f is constant on k; that is, f(x) = f(a) for all x β k
Answers: 1
Physics, 22.06.2019 19:30
Refrigerant-134a flows through a carnot heat pump cycle at 0.5 kg/s. it is known that the maximum absolute temperature in the cycle is 1.1 times the minimum absolute temperature, and the net power input to the cycle is 2.5 kw. if the refrigerant changes from a saturated vapor to a saturated liquid during the heat rejection process, determine the maximum magnitude of the enthalpy of vaporization for this process in kj/kg (with 3 significant figures).
Answers: 3
Which does a reference point provide? a position from which to measure future distance a set of stan...
Mathematics, 14.12.2021 22:40
Mathematics, 14.12.2021 22:40
History, 14.12.2021 22:40
English, 14.12.2021 22:40
Mathematics, 14.12.2021 22:40
Spanish, 14.12.2021 22:40
Chemistry, 14.12.2021 22:40
Mathematics, 14.12.2021 22:40
History, 14.12.2021 22:40
English, 14.12.2021 22:40
Physics, 14.12.2021 22:40