A stonecutter's chisel has an edge area of 0.7 cm2 . If the chisel is struck with a force of 42 N, what is the pressure exerted on the stone?
a. 600 N/m2
b. 30 000 N/m2
c. 300 000 N/m2
d. 600 000 N/m2
e. 6 000 N/m2
d
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A slender uniform rod 100.00 cm long is used as a meter stick. Two parallel axes that are perpendicular to the rod are considered. The first axis passes through the 50-cm mark and the second axis passes through the 30-cm mark
What is the ratio of the moment of inertia through the second axis to the moment of inertia through the first axis? A) I2/I1 = 1.5 B) I2/I1 = 1.7 C) I2/I1 = 1.9 D) I2/I1 = 2.1 E) I2/I1 = 2.3
A particle (charge = 40 ?C) moves directly toward a second particle (charge = 80 ?C) which is held in a fixed position. At an instant when the distance between the two particles is 2.0 m, the kinetic energy of the moving particle is 16 J. Determine the distance separating the two particles when the moving particle is momentarily stopped
a. 0.75 m b. 0.84 m c. 0.95 m d. 0.68 m e. 0.56 m
A transformer changes the 10,000 V power line to 120 V. If the primary coil contains 750 turns, how many turns are on the secondary?
A) 3 B) 0 C) 9 D) 6.3 × 104 E) 2.1 × 104
Heat is added to a 2.0 kg piece of ice at a rate of 793.0 kW. How long will it take for the ice to melt if it was initially at 0.00°C? (The latent heat of fusion for water is 334 kJ/kg and its latent heat of vaporization is 2260 kJ/kg.)
A) 0.84 s B) 530,000 s C) 4.7 s D) 670 s