An unusual spring has a restoring force of magnitude F = (2.0 N/m) x + (1.0 N/m2)x2, where x is the stretch of the spring from its equilibrium length
A 3.00 kg mass is attached to this spring and released from rest after stretching the spring 2.00 m. What is the speed of the mass when the spring returns to its equilibrium length?
A)
3.27 m/s
B)
5.48 m/s
C)
4.33 m/s
D)
7.41 m/s
E)
2.11 m/s
E
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Each of the following describes an "Atom 1" and an "Atom 2." In which case are the two atoms different isotopes of the same element?
A) Atom 1: nucleus with seven protons and eight neutrons, surrounded by seven electrons Atom 2: nucleus with seven protons and seven neutrons, surrounded by seven electrons B) Atom 1: nucleus with six protons and eight neutrons, surrounded by six electrons Atom 2: nucleus with seven protons and eight neutrons, surrounded by seven electrons C) Atom 1: nucleus with eight protons and eight neutrons, surrounded by eight electrons Atom 2: nucleus with eight protons and eight neutrons, surrounded by seven electrons D) Atom 1: nucleus with four protons and five neutrons, surrounded by four electrons Atom 2: nucleus with five protons and five neutrons, surrounded by four electrons
An object weighs 432 N on the surface of the earth. The earth has radius R. If the object is raised to a height of 3R above the earth's surface, what is its weight?
A) 108 N B) 48.0 N C) 27.0 N D) 305 N E) 144 N
Generation of photochemical smog involves the reaction of unburned hydrocarbons with sunlight in a closed basin
What will be an ideal response?
Determine the work done by 5 moles of an ideal gas that is kept at 100°C in an expansion from 1 liter to 5 liters
a. 2.5 × 10^4 J b. 1.1 × 10^4 J c. 6.7 × 10^3 J d. 2.9 × 10^3 J e. 8.4 × 10^3 J