A spring with spring constant k = 800 N/m is compressed 12 cm from its equilibrium position. A spring with spring constant k = 400 N/m has the same elastic potential energy as the first spring when its extension is
a. 0.060 m.
b. 0.085 m.
c. 0.12 m.
d. 0.17 m.
e. 0.24 m.
d
You might also like to view...
When did humans learn that the Earth is not the center of the universe?
A) within the past 500 years B) about 2,500 years ago C) about 1,000 years ago D) We haven't; there is still considerable scientific debate about whether Earth is the center of the universe.
A straight wire of length l is oriented east-west and is in a magnetic field B pointing north. The wire is moving downward at a constant speed v. If the resistance of the rod is R, what is the current through the rod?
a. R/Blv b. Blv/R c. B2l2v2/R2 d. not given
A point on a wheel of radius 40 cm that is rotating at a constant 5.0 revolutions per second is located 0.20 m from the axis of rotation. What is the acceleration of that point due to the spin of the wheel?
A) 0.050 m/s2 B) 1.4 m/s2 C) 48 m/s2 D) 200 m/s2 E) 0.00 m/s2
What is the energy of a photon that has the same wavelength as a 24 eV electron? (h = 6.63 × 10^-34 J×s, me = 9.11 × 10^-31 kg)
a. 24 eV c. 3.5 keV b. 14 × 10^-16 eV d. 5.0 keV