When a spring is stretched, its mass decreases
Indicate whether the statement is true or false
FALSE
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A solenoid with a certain number of turns N and carrying a current of 2.000 A has a length of 34.00 cm. If the magnitude of the magnetic field generated at the center of the solenoid is 9.000 mT, what is the value of N?
A) 860.0 B) 1591 C) 2318 D) 3183 E) 1218
What is the wavelength of a photon having the same momentum as an electron that is traveling at 7.5 km/s? (h = 6.626 × 10-34 J ? s, melectron = 9.11 × 10-31 kg)
What will be an ideal response?
Which of the following molecules contains a phenol?
A) a B) b C) c D) b and c E) all of them
A 1 m long rod for an aircraft must carry an axial load of 5×106 N, and the rod design mass is 54 kg. The rod is to be made from a high strength aluminum alloy that has a density of 2.7×103 kg/m3 , and the yield stress must be equal to twice the applied stress in the metal
(a) What is the minimum yield stress for the aluminum alloy? (b) The elastic modulus for aluminum alloys is 70×109 Pa, what is the elongation of the rod?