Size of the Nucleus: Estimate the mass of a nucleus with radius 2.8 ×10-15 m. (1 u = 1.6605 × 10-27 kg)
A. about 2.1 × 10-26 kg
B. about 7.5 × 10-27 kg
C. about 2.3 × 10-26 kg
D. about 4.7 × 10-26 kg
Answer: A
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The electric field has a magnitude of 3.00 N/m at a distance of 60.0 cm from a point charge. What is the charge?
A. 1.40 nC B. 120 pC C. 36.0 mC D. 12.0 ?C E. 3.00 nC
A mass is suspended vertically from a spring so it is at rest at the equilibrium position. The mass is pulled straight down to an extension x and released so that it oscillates about the equilibrium position. The acceleration is greatest in magnitude and directed upward when the mass is
A. at its maximum upward travel. B. at the equilibrium point. C. at its maximum lower travel. D. somewhere between the equilibrium point and maximum extension.
The heat of fusion of water is cal/g. This means 80 cal of energy are required to:
A. raise the temperature of 1 g of water by 1 K B. turn 1 g of water to steam C. raise the temperature of 1 g of ice by 1 K D. melt 1 g of ice E. increase the internal energy of 80 g of water by 1 cal
Consider the Sun and its largest planet Jupiter. Where on the line joining them is their center mass? Is it within or outside the Sun? (Sun-Jupiter avg distance 778.million km; Solar mass/Jupiter mass = 1.0 × 103; Solar diameter 1.4 million km)
What will be an ideal response?