Explain two methods that could be used to find the spring constant of a spring experimentally
(a) Measure the elongation caused by hanging various masses from the spring,
and use Hooke's law to calculate k.
(b) Measure the period of oscillation for a vibrating mass hung on the spring,
and find k from the equation for the period of a simple harmonic oscillator.
You might also like to view...
A brass wire (d 5 2.0 mm, E 5 110 GPa) is pretensioned to T 5 85 N. The coefficient of thermal expan- sion for the wire is 19.5 3 1026/°C. The temperature change at which the wire goes slack is approximately:
(A) 15.7 °C
(B) 212.6 °C
(C) 112.6 °C
(D) 218.2 °C
Based on this graph, if you can measure the mass of a galaxy's central bulge, then you will also know the approximate
A) mass of the galaxy's supermassive black hole. B) mass of the galaxy as a whole. C) diameter of the galaxy. D) diameter of the central bulge.
The H-R diagram can plot
A) apparent magnitude versus spectral classes. B) radius versus luminosity. C) radius versus mass. D) temperature versus luminosity. E) temperature versus mass.
A parallel-plate capacitor stores a charge Q = 4.00 nC when connected to a battery of voltage V = 10.0 V. The energy density is then u = 3.62 × 10-4 J/m3. What is the surface area of the plates?
A) 0.0250 m2 B) 0.0500 m2 C) 0.0923 m2 D) 0.0387 m2 E) 0.0103 m2